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# UNIVERSAL-SOLDER Electronics

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## Posts
- [TCP vs UDP Explained: How Data Moves Across Networks](https://www.universal-solder.ca/communication-tcp-udp/): TCP and UDP are two of the most important transport protocols used in computer networks and IoT systems. If your microcontroller communicates over WiFi, Ethernet or the internet, it will often use one of these protocols.
- [RS232 Explained: The Original Serial Communication Standard](https://www.universal-solder.ca/communication-rs232-explained/): RS232 is one of the oldest and most well-known serial communication standards. It was widely used for communication between computers, modems, industrial equipment and embedded systems long before modern interfaces like USB became common.
- [Differential Signaling Explained: Why RS485 and CAN Bus Are So Robust](https://www.universal-solder.ca/communication-differential-signalling/): Differential signaling is one of the most effective methods for transmitting digital data reliably in electrically noisy environments. It is used in communication systems such as RS485, CAN Bus, USB, Ethernet and many other robust interfaces.
- [Logic Analyzers Explained: The Most Useful Tool for Debugging Digital Communication](https://www.universal-solder.ca/communication-logic-analyzer/): A logic analyzer is one of the most useful tools for debugging digital electronics and communication problems. It allows you to see what is actually happening on digital signal lines such as I2C, SPI, UART, One-Wire and other serial interfaces.
- [Noise, Ripple and Clean Power: Why Power Quality Matters in Electronics](https://www.universal-solder.ca/power-noise-ripple/): Not all power supplies are equal. Even if the voltage is correct, poor power quality can cause unstable behavior, communication errors and unreliable operation in electronics systems.
- [Before You Blame the Module: Basic Skills Every Electronics Hobbyist Needs](https://www.universal-solder.ca/troubleshooting-basic-skills-needed-for-electronics/): Arduino, ESP32, sensors, displays and electronic modules make modern electronics much easier than it used to be. A beginner can connect a microcontroller, upload a sketch and make something blink, measure, move or display text within minutes.
- [Serial Monitor Shows Garbage: Wrong Baud Rate, Reset Messages and Boot Logs](https://www.universal-solder.ca/troubleshooting-serial-monitor-garbage/): The Serial Monitor is one of the most useful troubleshooting tools in Arduino, ESP32, ESP8266, RP2040 and CANABLOX projects. It can show sensor readings, debug messages, error codes, boot messages and program status.
- [When to Stop Blaming the Code and Check the Hardware](https://www.universal-solder.ca/troubleshooting-stop-blaming-code/): One of the biggest mistakes in Arduino, ESP32, ESP8266, RP2040 and sensor projects is assuming that every problem is a software problem. The sketch does not work, so the first reaction is to change libraries, rewrite functions, copy another example, reinstall the IDE or ask why the code is wrong.
- [LCD Shows Strange Characters After Running for a While](https://www.universal-solder.ca/troubleshooting-lcd-strange-characters/): Character LCD displays such as 1602, 2004 and 1604 modules are often used in Arduino, ESP32, ESP8266, RP2040 and CANABLOX projects. They are simple, readable and inexpensive. But one frustrating problem appears again and again: the LCD works at first, then later shows strange characters, random symbols, missing letters or corrupted text.
- [millis() Problems: Timers That Work for a While and Then Fail](https://www.universal-solder.ca/troubleshooting-problems-millis-command/): Using millis() instead of delay() is one of the most important steps in writing better Arduino, ESP32, ESP8266, RP2040 and CANABLOX projects. It allows the sketch to keep running while it waits for a timed event.
- [Breadboard and Jumper Wire Problems Nobody Wants to Believe](https://www.universal-solder.ca/troubleshooting-breadboard-problems/): Breadboards and jumper wires are useful for quick Arduino, ESP32, ESP8266, RP2040 and sensor experiments. They make it easy to build a circuit without soldering, change parts quickly and test ideas before designing a PCB.
- [It Works on USB but Not on External Power](https://www.universal-solder.ca/troubleshooting-only-works-on-usb-power/): A very common Arduino, ESP32, ESP8266 and RP2040 troubleshooting problem is a project that works perfectly while connected to USB, but fails as soon as it is powered from an external supply, battery, wall adapter, VIN pin, barrel jack or breadboard power module.
- [Using delay() Breaks Buttons, Sensors, Displays and Communication](https://www.universal-solder.ca/troubleshooting-problem-using-delay-command/): Many Arduino projects start with delay(). It is simple, easy to understand, and useful for a first blinking LED sketch. But as soon as a project grows beyond one simple task, delay() becomes one of the most common reasons why buttons do not respond, displays update slowly, sensors are missed, and communication feels unreliable.
- [SPI Displays Not Working: Wrong Pins, Wrong Driver or Wrong Speed](https://www.universal-solder.ca/troubleshooting-spi-display-problem/): SPI displays are widely used in Arduino, ESP32, ESP8266, RP2040 and embedded projects. They include small OLED displays, TFT displays, ST7567 graphic LCDs, ST7920 graphic LCDs, ILI9341 TFTs, ST7735 / ST7789 displays and many other modules.
- [ESP32 ADC Is Not Like Arduino ADC](https://www.universal-solder.ca/troubleshooting-adc-inputs/): Many users move from Arduino Uno or Nano to ESP32 and expect analogRead() to behave the same way. The code looks familiar, the function name is the same, and the ESP32 has many analog-capable pins. But the results can be surprising.
- [Analog Sensor Values Jump Around or Never Reach Zero](https://www.universal-solder.ca/troubleshooting-sensor-value-jumping/): Analog sensors are often used with Arduino, ESP32, ESP8266, RP2040 and other microcontroller boards to measure light, temperature, voltage, position, pressure, moisture or sound level. The idea seems simple: connect the sensor output to an analog input and read a number.
- [I2C Works on Arduino Uno but Not on ESP32](https://www.universal-solder.ca/troubleshooting-i2c-not-working-esp32/): A very common troubleshooting situation is this: an I2C display, sensor, RTC, ADC or I/O expander works perfectly with an Arduino Uno, but the same module does not work with an ESP32. The I2C scanner may find nothing, the display may stay blank, or the sensor library may report that the device is missing.
- [I2C Pull-Up Resistors: Too Weak, Too Strong or Too Many](https://www.universal-solder.ca/troubleshooting-i2c-pull-up-resistors/): I2C is one of the most useful communication interfaces for Arduino, ESP32, ESP8266, RP2040, Raspberry Pi Pico and CANABLOX projects. It allows many sensors, displays, real-time clocks, ADCs, DACs and I/O expanders to share only two signal wires: SDA and SCL.
- [I2C Address Conflicts: Two Modules with the Same Address](https://www.universal-solder.ca/troubleshooting-i2c-address-conflict/): I2C is popular because many sensors, displays, real-time clocks, ADCs, DACs and I/O expanders can share the same two signal wires: SDA and SCL. This makes wiring much cleaner than using a separate set of pins for every module.
- [ESP32 Keeps Rebooting After Uploading a Sketch](https://www.universal-solder.ca/troubleshooting-esp32-rebooting/): An ESP32 that keeps rebooting after uploading a sketch can be very confusing. The upload may finish successfully, but the board immediately restarts again and again. The serial monitor may show repeated boot messages, watchdog errors, brownout warnings, stack traces, or the same setup message printed over and over.
- [Failed Uploading on Arduino: avrdude, Port and Bootloader Problems](https://www.universal-solder.ca/troubleshooting-arduino-failed-upload/): One of the most common Arduino problems is a sketch that compiles correctly but does not upload. The Arduino IDE may show an error from avrdude, the progress bar may stop, or the board may simply fail to respond.
- [Arduino or ESP32 Not Detected by the Computer](https://www.universal-solder.ca/troubleshooting-esp32-not-recognized/): One of the first problems many users run into is also one of the most annoying: the Arduino, ESP32, ESP8266, RP2040 or other microcontroller board is plugged into USB, but the computer does not show a serial port.
- [ESP32 Brownout Detector Errors and Random Resets](https://www.universal-solder.ca/troubleshooting-esp32-brownout/): ESP32 boards are powerful, inexpensive and extremely useful for WiFi, Bluetooth, IoT, sensor and display projects. But they are also more demanding than simple 8-bit Arduino boards when it comes to power supply quality.
- [Relay Module Does Not Work with ESP32](https://www.universal-solder.ca/troubleshooting-esp32-relay-problems/): Relay modules are commonly used to switch lamps, pumps, fans, solenoids, motors and other external loads from Arduino, ESP32, ESP8266, RP2040 and similar microcontroller boards.
- [WS2812B / NeoPixel LEDs Flicker or Show Wrong Colors](https://www.universal-solder.ca/troubleshooting-ws2812b-neopixel/): WS2812B, NeoPixel and similar addressable RGB LEDs are extremely popular in Arduino, ESP32, ESP8266, RP2040 and decorative electronics projects. With only one data pin, a microcontroller can control many LEDs individually.
- [Common Ground Problems in Arduino and ESP32 Projects](https://www.universal-solder.ca/troubleshooting-common-ground-problems/): Common ground problems are among the most confusing issues in Arduino, ESP32, ESP8266, RP2040 and sensor projects. A circuit may look correct, the code may compile, and every module may have power, but the project still behaves randomly.
- [Arduino Resets When a Servo, Motor or Relay Turns On](https://www.universal-solder.ca/troubleshooting-arduino-resets-randomly/): One of the most common real-world Arduino problems is a project that works perfectly until a servo moves, a motor starts, a relay clicks, or an LED strip turns on. Then the Arduino resets, the display flickers, the serial monitor restarts, or the whole project behaves randomly.
- [DHT11 / DHT22 Reads NaN, 0 or Random Values](https://www.universal-solder.ca/troubleshooting-dht11-dht22-problems/): DHT11 and DHT22 temperature/humidity sensors are very common in Arduino, ESP8266, ESP32, RP2040 and beginner electronics projects. They are inexpensive, easy to connect, and supported by many Arduino libraries.
- [1602 / 2004 I2C LCD Backlight Works but No Text Appears](https://www.universal-solder.ca/troubleshooting-lcd-no-text/): Character LCD modules such as 1602, 2004 and 1604 displays are still very useful in Arduino, ESP32, ESP8266, RP2040 and CANABLOX projects. They are inexpensive, easy to read, and available with I2C backpack modules that reduce the wiring to only four connections.
- [OLED Shows Random Pixels: SSD1306 vs SH1106 and Other Causes](https://www.universal-solder.ca/troubleshooting-oled-random-pixel/): Small OLED displays are very popular in Arduino, ESP32, ESP8266, RP2040 and CANABLOX projects. They are bright, compact, inexpensive and easy to connect with only a few wires.
- [I2C Device Found, but the Display or Sensor Still Does Not Work](https://www.universal-solder.ca/troubleshooting-i2c-not-working/): Finding an I2C address with a scanner feels like a big success. It proves that the microcontroller can see something on the bus. But it does not always mean the project will work immediately.
- [I2C Scanner Finds Nothing: Wiring, Pull-Ups and Address Problems](https://www.universal-solder.ca/troubleshooting-i2c-scanner-not-working/): An I2C scanner is one of the most useful troubleshooting tools for Arduino, ESP32, ESP8266, RP2040 and similar microcontroller projects. It sends test messages to all possible I2C addresses and reports which devices answer.
- [ESP32 Upload Failed: Timed Out Waiting for Packet Header](https://www.universal-solder.ca/troubleshooting-esp32-upload-failed/): One of the most common ESP32 problems is an upload error that says something like “Timed out waiting for packet header”, “Failed to connect to ESP32”, or “No serial data received.”
- [Comparing XIAO Controllers for CANABLOX: RP2040, RP2350, ESP32, nRF52840 and More](https://www.universal-solder.ca/comparison-xiao-for-canablox/): One of the strongest advantages of CANABLOX is that it is not locked to one microcontroller. The system is built around modular hardware, and the controller can be selected based on the project. Instead of forcing every user into one specific board, CANABLOX can work with many XIAO-format controller modules.
- [CANABLOX vs Individual Modules: Which Is the Better Way to Start?](https://www.universal-solder.ca/comparison-canablox-vs-generic-modules/): CANABLOX is designed as a modular development system. Instead of building projects with loose jumper wires and breadboards, CANABLOX uses standardized modules, clean I2C connections, baseboards and practical connectors. A project can be assembled from functional blocks such as a controller, RTC, display, ADC, DAC, keypad and I/O expansion modules.
- [CANADUINO PLC Modules Compared: Choosing the Right Controller for Automation Projects](https://www.universal-solder.ca/comparison-canaduino-arduino-plc/): CANADUINO PLC modules are designed for users who want Arduino-compatible (Arduino IDE programmable) control hardware in a more practical automation format. Instead of wiring every input and output through loose jumper wires, a PLC-style module provides screw terminals, protected I/O options, power connections and a cleaner layout for real-world control projects.
- [Arduino UNO Shield vs Modular CANABLOX System: Two Ways to Build Projects](https://www.universal-solder.ca/comparison-shields-vs-canablox/): Arduino shields made the original Arduino ecosystem very successful. A shield plugs on top of an Arduino UNO-style board and adds a function such as motor control, Ethernet, relays, prototyping space or a display. This approach is simple and familiar, but it also has limits.
- [Breadboard Wiring vs CANABLOX: From Loose Jumper Wires to a Modular Development System](https://www.universal-solder.ca/comparison-breadboards-vs-canablox/): Breadboards are useful. They are cheap, flexible and perfect for learning how simple circuits work. But every maker knows what happens when a breadboard project grows: jumper wires everywhere, loose contacts, unclear wiring and hours of troubleshooting problems that are not caused by the code at all.
- [Screw Terminals vs Pin Headers vs STEMMA QT / Qwiic Connectors: Choosing Module Connections](https://www.universal-solder.ca/comparison-connector-types/): Electronic modules can connect to a project in many different ways. Three common connector styles are screw terminals, pin headers and STEMMA QT / Qwiic 4-pin I2C connectors. They all move signals and power from one board to another, but they are designed for different situations.
- [3.3V vs 5V Logic: Connecting Modern Modules to Classic Arduino Boards](https://www.universal-solder.ca/comparison-3-3v-vs-5v-logic/): Many Arduino-compatible projects mix older 5V boards with newer 3.3V modules. A classic Arduino UNO or Nano usually uses 5V logic. Many modern boards, sensors and wireless modules use 3.3V logic. This difference matters because signal voltage is not only a power supply detail. It can decide whether a circuit works reliably or whether a module gets damaged.
- [BSS138 Level Shifter vs TXS0108E: Choosing the Right Logic Level Converter](https://www.universal-solder.ca/comparison-level-shifter/): Logic level converters are used when one part of a project uses 5V logic and another part uses 3.3V logic. This is common when connecting older Arduino UNO-style boards to modern sensors, displays, ESP32 modules, RP2040 boards or XIAO modules.
- [I2C Multiplexer vs GPIO Expander: Solving Different Expansion Problems](https://www.universal-solder.ca/comparison-i2c-multiplexer-vs-expander/): I2C modules make it easy to connect sensors, displays, RTCs, ADCs, DACs and other devices with only two signal wires. But as projects grow, two common problems appear: too many I2C devices with the same address, or not enough digital input/output pins.
- [MCP23017 vs PCF8574: I2C GPIO Expanders Compared](https://www.universal-solder.ca/comparison-mcp23017-vs-pcf8574/): Microcontrollers often run out of input and output pins. This is especially common when a project uses buttons, relays, LEDs, keypads, displays or several modules at the same time. I2C GPIO expanders solve this problem by adding extra digital pins through the I2C bus.
- [PWM vs DAC Output: Creating Analog Voltages With Microcontrollers](https://www.universal-solder.ca/comparison-pwm-vs-dac/): Microcontrollers usually produce digital outputs: a pin is either LOW or HIGH. But many projects need something that behaves like an analog voltage. Two common ways to do this are PWM and DAC output.
- [MCP4725 vs MCP4728: Single-Channel and Four-Channel DAC Modules Compared](https://www.universal-solder.ca/comparison-mcp4725-vs-mcp4728/): Digital-to-analog converters, or DACs, are used when a microcontroller needs to output a real analog voltage instead of only digital HIGH/LOW signals or PWM. Two common I2C DAC options are the MCP4725 and MCP4728.
- [Built-In ADC vs ADS1115: When to Use an External Analog-to-Digital Converter](https://www.universal-solder.ca/comparison-ads1115-vs-internal-adc/): Many microcontrollers include analog inputs, so it is tempting to connect every analog sensor directly to the board. For simple projects, that often works well. But when accuracy, resolution, stable readings or small voltage changes matter, an external analog-to-digital converter such as the ADS1115 can be a much better choice.
- [WS2812B Strip vs Matrix vs Ring: Addressable RGB LED Formats Compared](https://www.universal-solder.ca/comparison-ws2812b/): WS2812B-style addressable RGB LEDs are popular because many LEDs can be controlled with only one data signal. Each LED contains red, green and blue LED chips plus a tiny controller. The LEDs are connected in a chain, and the microcontroller sends color data through the chain.
- [MAX7219 vs TM1637 vs TM1638 vs CH423S: LED Display Driver Modules Compared](https://www.universal-solder.ca/comparison-max7219-tn1637-tm1638-ch423s/): LED displays can use many microcontroller pins if they are wired directly. This is why LED display driver chips are so useful. A display driver handles multiplexing, segment control and brightness control, while the microcontroller only sends the data that should appear on the display.
- [7-Segment Display vs LED Matrix vs Character LCD: Best Display for Numbers and Status](https://www.universal-solder.ca/comparison-7-segment-matrix-character/): 7-Segment Display vs LED Matrix vs Character LCD: Best Display for Numbers and Status
- [OLED vs LCD: Readability, Power Consumption and Project Fit](https://www.universal-solder.ca/comparison-display-technologies/): OLED and LCD displays are both common choices for Arduino-compatible projects, but they behave very differently. OLED displays are self-emitting, high-contrast and often very compact. LCD displays use liquid crystal segments or pixels and usually depend on ambient light or a backlight.

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- [Backorder Policy](https://www.universal-solder.ca/backorder/): Last updated: 2025-06-10
- [Sitemap](https://www.universal-solder.ca/product-sitemap/): PostsCANABLOX vs Individual Modules: Which Is the Better Way to Start? (April 26, 2026)I2C Explained: Addressing, Speed, Pull-Ups and Practical Limits (April 26, 2026)Breadboard and Jumper Wire Problems Nobody Wants to Believe (April 26, 2026)When to Stop Blaming the Code and Check the Hardware (April 26, 2026)Analog Sensor Values Jump Around or Never Reach Zero (April 26, 2026)Combining Multiple Time Sources: RTC, GPS, NTP and Atomic Clock (April 26, 2026)DS1307 vs DS3231: Which RTC Should You Use? (April 26, 2026)DS3231 RTC: High-Accuracy Timekeeping with Temperature Compensation (April 26, 2026)Choosing the Best Time Source for Your Project (April 26, 2026)Building Clocks with Arduino, ESP32 and RTC Modules (April 26, 2026)Sensor Placement: Why Location Matters More Than the Sensor (April 26, 2026)Sensor Types Overview: A Quick Comparison of Common Sensors (April 26, 2026)Choosing the Right Sensor for Your Project: A Practical Decision Guide (April 26, 2026)Sensor Accuracy, Resolution, Calibration and Repeatability (April 26, 2026)Common Sensor Problems and Troubleshooting Tips (April 26, 2026)Rechargeable Batteries: Li-Ion, NiMH, Lead-Acid and More (April 26, 2026)Fuses, Protection and Safety in Low-Voltage Electronics (April 26, 2026)Understanding Voltage Drop, Efficiency and Power Loss in Circuits (April 26, 2026)Power Supplies in Electronics: Types, Uses and Selection Guide (April 26, 2026)Choosing the Right Power Supply for Your Electronics Project (April 26, 2026)AC to DC Power Supplies: From Mains to Safe Low Voltage (April 26, 2026)DC-DC Converters Explained: Buck, Boost and Buck-Boost (April 26, 2026)Measuring Voltage, Current and Power: A Practical Guide (April 26, 2026)Atmega Microcontrollers (AVR): Architecture, Peripherals and Practical Use (April 26, 2026)STM32 Microcontrollers: Architecture, Series Overview and Practical Use (April 26, 2026)ESP8266 and ESP32 Microcontrollers: Architecture, Variants and Practical Comparison (April 26, 2026)Choosing the Right Display for Your Project: LCD, OLED, ePaper and LED Compared (April 26, 2026)SPFD5408 Parallel TFT Displays: When Speed Matters (April 26, 2026)TFT LCD Displays with ST7735 and ST7789: Small Color Displays Explained (April 26, 2026)Using Character LCDs with I2C Adapters (PCF8574) (April 26, 2026)ESP8266 vs ESP32 vs ESP32-C3 vs ESP32-C6: Which WiFi Microcontroller Should You Use? (April 26, 2026)nRF52840 vs ESP32-C6: Bluetooth, Thread, Zigbee and WiFi Tradeoffs (April 26, 2026)Breadboard Wiring vs CANABLOX: From Loose Jumper Wires to a Modular Development System (April 26, 2026)Arduino UNO vs Nano vs Pro Mini: Choosing the Right ATmega328P Board (April 26, 2026)Seeed Studio XIAO Modules Compared: RA4M1, RP2040, RP2350, ESP32 and nRF52840 (April 26, 2026)Arduino UNO R3 vs UNO R4 Minima vs UNO R4 WiFi (April 26, 2026)Infrared (IR) Communication Explained: Remote Control Protocols and IR Kits (April 26, 2026)RF Modules Explained: 315, 433, 868 and 915 MHz Wireless Communication for Embedded Projects (April 26, 2026)LoRa Explained: Long-Range Low-Power Communication for IoT (April 26, 2026)Bluetooth Low Energy (BLE) Explained: Efficient Wireless for IoT (April 26, 2026)Bluetooth Explained: Short-Range Wireless for Embedded Devices (April 26, 2026)WiFi Explained: High-Speed Networking for IoT Devices (April 26, 2026)MQTT Explained: Lightweight Messaging for IoT Systems (April 26, 2026)TCP vs UDP Explained: How Data Moves Across Networks (April 26, 2026)Differential Signaling Explained: Why RS485 and CAN Bus Are So Robust (April 26, 2026)0-10V Control Signals Explained: Simple Analog Control in Automation Systems (April 26, 2026)4-20mA Current Loop Explained: Noise-Resistant Industrial Signaling (April 26, 2026)One-Wire Communication Explained: Minimal Wiring for Sensors and Devices (April 26, 2026)CAN Bus Explained: Reliable Communication for Automotive and Industrial Systems (April 26, 2026)Modbus Explained: Industrial Communication Protocol over RS485 and TCP (April 26, 2026)RS485 Explained: Long-Distance and Multi-Device Communication (April 26, 2026)UART Explained: RX/TX Communication Between Microcontrollers (April 26, 2026)SPI Explained: Full-Duplex Communication for High-Speed Peripherals (April 26, 2026)RS232 Explained: The Original Serial Communication Standard (April 26, 2026)Logic Analyzers Explained: The Most Useful Tool for Debugging Digital Communication (April 26, 2026)I2S Explained: Digital Audio Communication for Microcontrollers (April 26, 2026)Using delay() Breaks Buttons, Sensors, Displays and Communication (April 26, 2026)SPI Displays Not Working: Wrong Pins, Wrong Driver or Wrong Speed (April 26, 2026)OLED Shows Random Pixels: SSD1306 vs SH1106 and Other Causes (April 26, 2026)ESP32 ADC Is Not Like Arduino ADC (April 26, 2026)I2C Device Found, but the Display or Sensor Still Does Not Work (April 26, 2026)I2C Scanner Finds Nothing: Wiring, Pull-Ups and Address Problems (April 26, 2026)I2C Works on Arduino Uno but Not on ESP32 (April 26, 2026)ESP32 Upload Failed: Timed Out Waiting for Packet Header (April 26, 2026)I2C Pull-Up Resistors: Too Weak, Too Strong or Too Many (April 26, 2026)I2C Address Conflicts: Two Modules with the Same Address (April 26, 2026)ESP32 Keeps Rebooting After Uploading a Sketch (April 26, 2026)Failed Uploading on Arduino: avrdude, Port and Bootloader Problems (April 26, 2026)Before You Blame the Module: Basic Skills Every Electronics Hobbyist Needs (April 26, 2026)Arduino or ESP32 Not Detected by the Computer (April 26, 2026)Serial Monitor Shows Garbage: Wrong Baud Rate, Reset Messages and Boot Logs (April 26, 2026)ESP32 Brownout Detector Errors and Random Resets (April 26, 2026)Relay Module Does Not Work with ESP32 (April 26, 2026)LCD Shows Strange Characters After Running for a While (April 26, 2026)WS2812B / NeoPixel LEDs Flicker or Show Wrong Colors (April 26, 2026)millis() Problems: Timers That Work for a While and Then Fail (April 26, 2026)Common Ground Problems in Arduino and ESP32 Projects (April 26, 2026)Arduino Resets When a Servo, Motor or Relay Turns On (April 26, 2026)It Works on USB but Not on External Power (April 26, 2026)DHT11 / DHT22 Reads NaN, 0 or Random Values (April 26, 2026)Handling Power Loss and Time Recovery in Embedded Systems (April 26, 2026)GPS Time Reception: Accurate Time Without Internet (April 26, 2026)DS3231 Alarm and Interrupt Functions Explained (April 26, 2026)WWVB-BPSK and the EverSet ES100: Modern Atomic Clock Reception (April 26, 2026)Testing and Measuring Clock Accuracy: ppm, Drift and Logging Methods (April 26, 2026)MAS6180C Atomic Clock Receiver: Reliable AM Time Signal Reception (April 26, 2026)Antenna Design for 60 kHz and 77.5 kHz Atomic Clock Receivers (April 26, 2026)77.5 kHz DCF77 Atomic Clock Reception in Europe (April 26, 2026)Power Consumption of RTC Circuits: Designing Ultra-Low Power Clocks (April 26, 2026)60 kHz Atomic Clock Receivers: WWVB, MSF and JJY Time Signals (April 26, 2026)RTC Calibration and Software Drift Compensation (April 26, 2026)I2C RTC Modules: Wiring, Pull-Ups, Addresses and Common Problems (April 26, 2026)RTC Backup Batteries, Supercapacitors and Long-Term Timekeeping (April 26, 2026)Unix Time, Epoch and Time Formats in Embedded Systems (April 26, 2026)Time Zones, DST and UTC Handling in Embedded Systems (April 26, 2026)Clock Displays: 7-Segment, LCD, OLED and ePaper Options (April 26, 2026)DS1307 RTC: The Classic Low-Cost Real-Time Clock (April 26, 2026)WWVB vs DCF77 vs MSF vs JJY: Comparing Long-Wave Time Signals (April 26, 2026)Timekeeping in Electronics: RTC, Atomic Clock, GPS and Internet Time (April 26, 2026)Crystal Accuracy, Drift and Temperature Effects in Clock Circuits (April 26, 2026)Why Atomic Clock Reception Fails Indoors and How to Improve It (April 26, 2026)Atomic Clock Receiver Output Signals: Pulse Timing, Decoding and Microcontroller Input (April 26, 2026)I2C Address Conflicts and Using Multiple RTCs on One Bus (April 26, 2026)Internet Time with NTP: Using WiFi and Ethernet for Time Synchronization (April 26, 2026)Sensor Interfaces: Analog, Digital, I2C, SPI, One-Wire and Modbus Explained (April 26, 2026)Industrial Sensors: NPN, PNP, 0-10V, 4-20mA and Modbus Sensor Basics (April 26, 2026)Gas and Air Quality Sensors: What Low-Cost Modules Can and Cannot Tell You (April 26, 2026)Sensor Fusion Explained: Combining Data for Better Results (April 26, 2026)Noise and Sound Detection Sensors: Microphones, Sound Level and Audio Modules (April 26, 2026)Combining Multiple Sensors in One Project: Design and Integration Best Practices (April 26, 2026)Light and Color Sensors: Ambient Light, RGB and RGBC Sensors Explained (April 26, 2026)Current and Voltage Sensors: INA219, INA226 and INA3221 Explained (April 26, 2026)Sensor Sampling Rate and Response Time Explained (April 26, 2026)PIR and Radar Motion Sensors: Detecting People and Movement (April 26, 2026)Digital vs Analog Sensors: Which One Should You Use? (April 26, 2026)Distance Sensors: Ultrasonic, Time-of-Flight and Proximity Sensors (April 26, 2026)Long Cable Runs with Sensors: Noise, Shielding and Signal Integrity (April 26, 2026)Motion and Orientation Sensors: Accelerometers, Gyroscopes and Magnetometers (April 26, 2026)Sensor Calibration Techniques: Practical Methods for Better Accuracy (April 26, 2026)Pressure and Environmental Sensors: BMP180, BMP280, BME280 and BME680 (April 26, 2026)Using Multiple I2C Sensors: Address Conflicts, Bus Limits and Multiplexers (April 26, 2026)Humidity Sensors: DHT, AHT, SHT and HDC1080 Compared (April 26, 2026)Level Shifting for Sensors: When and How to Use It (April 26, 2026)Temperature Sensors: DS18B20, DHT11, DHT22, AHT20, AHT21, AHT25, SHT30 and SHT40 (April 26, 2026)Sensor Overview: Choosing the Right Sensor for Arduino and Electronics Projects (April 26, 2026)Powering Sensors Correctly: 3.3V, 5V, Pull-Ups and Level Shifting (April 26, 2026)Choosing the Right Battery for Your Electronics Project (April 26, 2026)Power Connectors Explained: Barrel Plugs, USB and Common Pitfalls (April 26, 2026)Battery Protection, Monitoring and Balancing Basics (April 26, 2026)Powering Electronics from a 12V Car System: What You Need to Know (April 26, 2026)Charging Methods Explained: CC, CV and CC/CV Charging (April 26, 2026)Powering Arduino and ESP32 Safely: Common Mistakes and Best Practices (April 26, 2026)Solar Power for Electronics: Small Panels, Charging and Practical Use (April 26, 2026)Lithium Batteries Explained: 18650 Cells, Protection, Charging and Safe Use (April 26, 2026)Using 5V Solar Cells to Power Microcontrollers and Sensors (April 26, 2026)Generating 9V and 12V from USB: How Converter Cables Work (April 26, 2026)Battery Capacity, Internal Resistance and Real-World Performance (April 26, 2026)Choosing the Right Power Supply for Mixed Voltage Systems (April 26, 2026)USB Power Basics: Voltage, Current and Limitations (April 26, 2026)AA, AAA, Coin Cells and 9V Batteries: Differences and Applications (April 26, 2026)Using USB Power for Arduino and DIY Electronics Projects (April 26, 2026)Driving LEDs with Constant Current Power Supplies (April 26, 2026)Primary Batteries: Types, Characteristics and When to Use Them (April 26, 2026)Choosing the Right AC-DC Power Supply for Your Project (April 26, 2026)Using CC/CV Converters for Battery Charging (Non-Lithium) (April 26, 2026)Open Frame vs Enclosed Power Supplies: Pros and Cons (April 26, 2026)Constant Current (CC) vs Constant Voltage (CV): What’s the Difference? (April 26, 2026)Linear vs Switching Regulators: Efficiency, Heat and Practical Tradeoffs (April 26, 2026)Encapsulated Power Supply Modules: Compact and Safe Solutions (April 26, 2026)Buck-Boost Converters: Stable Voltage from Varying Input (April 26, 2026)Overheating Power Modules: Causes and Solutions (April 26, 2026)Step-Up (Boost) Converters: Generating Higher Voltages (April 26, 2026)DC vs AC: Understanding the Two Worlds of Electrical Power (April 26, 2026)Voltage Instability, Brownouts and Reset Issues in Microcontrollers (April 26, 2026)Noise, Ripple and Clean Power: Why Power Quality Matters in Electronics (April 26, 2026)Step-Down (Buck) Converters: Efficient Voltage Reduction (April 26, 2026)Voltage, Current and Power Explained for Electronics Projects (April 26, 2026)Why Your Circuit Doesn’t Work: Power Supply Problems Explained (April 26, 2026)Efficiency, Heat and Current Limits in DC-DC Converters (April 26, 2026)Microcontroller Overview: Atmega, ESP32, STM32, RP2040, nRF (April 26, 2026)nRF Microcontrollers and RF Modules: BLE, Low Power and Wireless Design (April 26, 2026)RP2040 and RP2350 Microcontrollers: Architecture, PIO and Practical Use (April 26, 2026)Display Interfaces Explained: I2C vs SPI vs Parallel (April 26, 2026)Common Display Problems and Troubleshooting (April 26, 2026)Level Shifting for Displays: 3.3V vs 5V Systems Explained (April 26, 2026)WS2812B Addressable LEDs: Strips, 4x4 and 8x8 Matrices Explained (April 26, 2026)LED Dot Matrix Displays: MAX7219, TM1640 and IS31FL3731 Compared (April 26, 2026)Driving 7-Segment Displays with I2C and Driver Chips (CH423, TM1637, MAX7219) (April 26, 2026)7-Segment Displays Explained: From Single Digits to Multi-Digit Modules (April 26, 2026)HD44780 Character LCDs: 16x2 and 20x4 Displays Explained (April 26, 2026)OLED Displays with SSD1306, SH1106 and SSD1309: Differences and Use Cases (April 26, 2026)GC9A01 Round TFT Displays: Design and Use Cases (April 26, 2026)ST7567 and ST7920 Graphic LCDs: Monochrome Displays for Embedded Systems (April 26, 2026)Built-In ADC vs ADS1115: When to Use an External Analog-to-Digital Converter (April 26, 2026)ESP32-CAM vs Regular ESP32 Boards: When the Camera Module Makes Sense (April 26, 2026)ESP32 DevKit vs D1 Mini ESP32 vs XIAO ESP32: Board Formats Compared (April 26, 2026)WS2812B Strip vs Matrix vs Ring: Addressable RGB LED Formats Compared (April 26, 2026)ESP32-C3 vs ESP32-C5 vs ESP32-C6: Modern RISC-V ESP32 Modules Compared (April 26, 2026)MAX7219 vs TM1637 vs TM1638 vs CH423S: LED Display Driver Modules Compared (April 26, 2026)7-Segment Display vs LED Matrix vs Character LCD: Best Display for Numbers and Status (April 26, 2026)STM32 Black Pill vs RP2040 vs ESP32: Choosing a More Powerful Arduino-Compatible Board (April 26, 2026)Character LCD vs OLED vs TFT vs ePaper: Choosing a Display for Arduino Projects (April 26, 2026)RP2040 vs RP2350 vs ATmega328P: Modern Replacement or Classic Simplicity? (April 26, 2026)CANADUINO PLC Modules Compared: Choosing the Right Controller for Automation Projects (April 26, 2026)Atomic Clock Receiver vs NTP vs GPS Time: Choosing the Right Time Source (April 26, 2026)ATtiny85 vs ATtiny88 vs ATmega328P: Small Arduino-Compatible Controllers Compared (April 26, 2026)60kHz vs 77.5kHz Atomic Clock Receivers: WWVB, MSF, JJY and DCF77 Applications (April 26, 2026)CH340 vs ATmega16U2 vs CP2102: USB-to-Serial Chips on Arduino-Compatible Boards (April 26, 2026)MAS6180C vs ES100: AM Atomic Clock Receiver Technologies Compared (April 26, 2026)ATmega328P vs ATmega2560 vs ATmega32U4: Which Classic Arduino Chip Makes Sense? (April 26, 2026)3.3V vs 5V Logic: Connecting Modern Modules to Classic Arduino Boards (April 26, 2026)433MHz Simple RF Modules vs nRF24L01 vs LoRa: Low-Cost Wireless Options Compared (April 26, 2026)BSS138 Level Shifter vs TXS0108E: Choosing the Right Logic Level Converter (April 26, 2026)nRF24L01 Mini vs nRF24L01+PA+LNA: Range, Power and Practical Use (April 26, 2026)I2C Multiplexer vs GPIO Expander: Solving Different Expansion Problems (April 26, 2026)HC-05 Bluetooth Classic vs JDY-16 BLE: Serial Bluetooth Modules Compared (April 26, 2026)MCP23017 vs PCF8574: I2C GPIO Expanders Compared (April 26, 2026)nRF24L01 vs HC-05 vs JDY-16 vs LoRa: Wireless Modules for Arduino Projects Compared (April 26, 2026)PWM vs DAC Output: Creating Analog Voltages With Microcontrollers (April 26, 2026)ESP-01S vs ESP-01M vs D1 Mini: Small ESP8266/ESP8285 Modules Compared (April 26, 2026)Power Requirements of Displays: Backlight, OLED and LED Current Considerations (April 26, 2026)ePaper Displays Explained: Low-Power Screens for Static Information (April 26, 2026)Display Technologies Explained: LCD vs OLED vs ePaper vs LED (April 26, 2026)Screw Terminals vs Pin Headers vs STEMMA QT / Qwiic Connectors: Choosing Module Connections (April 26, 2026)OLED vs LCD: Readability, Power Consumption and Project Fit (April 26, 2026)MCP4725 vs MCP4728: Single-Channel and Four-Channel DAC Modules Compared (April 26, 2026)Comparing XIAO Controllers for CANABLOX: RP2040, RP2350, ESP32, nRF52840 and More (April 26, 2026)Arduino UNO Shield vs Modular CANABLOX System: Two Ways to Build Projects (April 26, 2026)1602 / 2004 I2C LCD Backlight Works but No Text Appears (April 26, 2026)Pages10. Anniversary Newsletter (June 8, 2026)Electronics Knowledge Base (April 25, 2026)3D Secure Explained (March 5, 2026)Bonus Wheel (February 5, 2026)Audio amplifiers and DIY kits (January 30, 2026)Checkout (August 10, 2025)Shop (August 10, 2025)Newsletter (May 9, 2025)Return Policy (January 26, 2025)Backorder Policy (December 31, 2024)ELECTRONIC SUPPLY STORE NEAR ME (December 31, 2024)Sale (December 31, 2024)Sitemap (December 31, 2024)New Arrivals (December 31, 2024)Support (December 31, 2024)About Us (December 31, 2024)Home (December 31, 2024)Shipping Policy (December 30, 2024)Privacy Policy (December 30, 2024)Terms And Conditions (December 30, 2024)Downloads and Documentation (December 30, 2024)ProductsSeeed Studio XIAO MG24 (June 29, 2026)Seeed Studio XIAO SAMD21 (June 29, 2026)MQ-135 Air Quality Sensor (June 8, 2026)MQ-7 Carbon Monoxide Sensor (June 8, 2026)MQ-3 Alcohol Sensor (June 8, 2026)MQ-2 Sensor for Combustible Gases and Smoke (June 8, 2026)0.96 inch IPS TFT Display with ST7735S - 80x160 pixel - SPI (June 8, 2026)PCM5102 pHAT I2S Sound Card for Raspberry Pi (June 8, 2026)MAX98357 Class-D Amplifier 3W - I2S interface (June 8, 2026)OLED 0.96 inch with 4 buttons and I2C interface - blue (June 8, 2026)Universal DIN Rail Mounting Kit for 50x75mm Electronic Modules (May 28, 2026)Universal Screw Terminal Adapter DIY Soldering Kit for Development Modules (May 28, 2026)Seeed Studio XIAO ESP32C5 Dual-Band (April 23, 2026)NodeMCU V3 ESP8266 with OLED display USB-C (March 1, 2026)Bluetooth 4.2 BLE Serial Module I2C UART SPI (March 1, 2026)2.13 inch 3-color ePaper Module SPI, Black White Red (March 1, 2026)1.54 inch ePaper display 200x200, SPI, black/white (March 1, 2026)INMP441 digital MEMS microphone omnidirectional I2S (March 1, 2026)9V Battery Holder for 6F22 and compatible batteries - open wire ends (March 1, 2026)CANADUINO® EverSet ES100 ADK V2 Atomic Clock DIY kit for WWVB-BPSK (January 14, 2026)CANADUINO Arduino Pocket Calculator DIY Kit (December 18, 2025)10 pcs Stackable Long-Lead Female Headers (8-pin) for D1 Mini Shields (October 16, 2025)CANADUINO D1 Mini Keypad / JoyPad I2C (October 14, 2025)CANADUINO D1 Mini ADS1115 ADC (4 Channel, 16Bit, I2C) (October 14, 2025)CANADUINO D1 Mini GPIO Expander I2C 8-Channel (October 14, 2025)Seeed Studio XIAO nRF52840 (September 23, 2025)Seeed Studio XIAO RP2040 (September 23, 2025)Seeed Studio XIAO RP2350 (September 23, 2025)Seeed Studio XIAO RA4M1 (September 23, 2025)Seeed Studio XIAO ESP32S3 (September 23, 2025)3x AA Battery Holder, open wire ends (July 29, 2025)Osram SCD55100A intelligent 10-digit Dot-Matrix Display (red) and socket DIP-28 (July 17, 2025)WEMOS D1 Mini ESP8266 V4.0.0 with USB Type-C (June 18, 2025)Temperature Monitoring with Alarm DIY Soldering Kit (June 10, 2025)50 pcs. M3 PCB Mounting Hardware Kit Black Plastic (June 10, 2025)5 x I2C cable 10cm for STEMMA QT / Qwiic / CANABLOX (June 10, 2025)5 x I2C cable 5cm for STEMMA QT / Qwiic / CANABLOX (June 10, 2025)CANADUINO PLC-100 DIN Rail Mounting Kit (June 3, 2025)10 pcs. M3 Nut - Plastic Mounting Hardware (June 1, 2025)10 pcs. M3 Standoff 12+6mm - Plastic Black (June 1, 2025)10 pcs. M3 Spacer 12mm - Plastic Mounting Hardware (June 1, 2025)10 pcs. M3 Spacer 8mm - Plastic Mounting Hardware (June 1, 2025)10 pcs. M3 Screw 6mm - Plastic Mounting Hardware (June 1, 2025)FM Stereo Radio DIY Kit with LED Display and Headphone Jack (May 13, 2025)1.77 inch Display TFT IPS with ST7735 - 128x160 pixel - SPI (May 11, 2025)DC-DC Buck-Boost Converter Module 0.5-30V, 4A - Panel Mount (May 11, 2025)Stand-Alone MP3 Player Solution with Amplifier and Audio-Out (May 11, 2025)Square Wave Frequency PWM Generator 1Hz-150kHz (May 11, 2025)200pcs M3 Brass Spacer - Standoff - Nut - Screw Kit (May 10, 2025)High Accuracy (0.1°C) Temperature Controller 110-220V 10A/20A (May 10, 2025)120s Audio Recording and Playback Module Chipcorder (May 10, 2025)2 x 50W Class-D Audio Amplifier with Tone Control 12-24V (May 10, 2025)Wi-Fi Temperature Controller, app control, cloud logging (May 10, 2025)FM Radio Receiver DIY Kit with Display and RDS (May 10, 2025)Battery Holder 6 x AA (9V) with 2.1/5.5mm DC Barrel Plug (May 10, 2025)MAX30100 Heart Rate and SpO2 Sensor Module I2C 1.8-5.5V (May 10, 2025)Temperature Controller - Thermostat (heating or cooling) 110-220V 10A (May 10, 2025)1.54 inch OLED 128x64 I2C (white) SSD1309 (May 10, 2025)8 Channel Level Converter 1.8V-3.3V-5V-12V better than TXS0108E (February 20, 2025)USBasp ISP programmer for AVR Microcontrollers (February 18, 2025)RP2350-Plus 16MB development board (January 25, 2025)WeAct ESP32-C6-MINI WiFi Bluetooth Mesh Board - 4MB (January 25, 2025)Si4703 FM Stereo Receiver Module with RDS (January 25, 2025)RP2350-Tiny-Kit 4MB Dev Module + USB Interface (January 25, 2025)ISD1820 Voice Recorder / Playback Module 20s with Speaker (January 25, 2025)Sound Module for HK66T Melody Chips (January 25, 2025)Graphic LCD GM12864 Black/White - SPI - ST7567 - 128x64 Pixel (January 25, 2025)CANADUINO MEGA2560 PLC-300 V2 DIY soldering kit (January 25, 2025)Seeed Studio XIAO ESP32C3 (January 1, 2025)Seeed Studio XIAO ESP32C6 Wi-Fi Bluetooth Module (January 1, 2025)FM Radio Receiver DIY Kit (wood) (January 1, 2025)Propeller Car DIY Kit (wood) - Easy Beginner Project (January 1, 2025)CANADUINO RP2040 PLC-100 V1 (for RP2040 Zero) (January 1, 2025)Bluetooth Speaker DIY Kit (wood) (January 1, 2025)CANADUINO ESP32 PLC-100 V1 (for ESP32-C6-DevKitC) (January 1, 2025)CANADUINO MEGA328 PLC-100 V2 SMD for Arduino Nano (Arduino PLC) (January 1, 2025)350 x pre-formed breadboard jumper wires in box (January 1, 2025)DHT20 Temperature Humidity Sensor I2C (January 1, 2025)USB 3.0 PD2.0 PD3.0 Type-C - USB PD Decoy Module - 5-20V output (January 1, 2025)4-20mA to Voltage Converter (0-3.3...10V) (January 1, 2025)Mini DC-DC Buck Converter 16W 4.5-16V to 3...9V (January 1, 2025)Arduino UNO R4 Minima (compatible) (January 1, 2025)3.7V Lithium Charger Booster 4.2-27V Output, 5W (January 1, 2025)Arduino UNO R4 Wi-Fi (compatible) (January 1, 2025)ESP32-C6-DevKitC-1 V1.2 with 8MB SPI Flash Wi-Fi 6 + BT BLE (January 1, 2025)Programmable PWM DC Motor Speed Controller 5-30V, 5A (January 1, 2025)2 x Desoldering Wick - Braid (2mm and 3.5mm) 1.5m each (January 1, 2025)Dual L293D Motor Control Shield for Arduino (January 1, 2025)Dual BTS7960 H-Bridge DC Motor Driver max. 43A (January 1, 2025)60W BTL Amplifier TPA3118 (Bridge-To-Load) (January 1, 2025)CC2530 Zigbee UART Module (January 1, 2025)DC Voltmeter Panel Mount 0.56 inch LED 4.5-30V (January 1, 2025)RS485 Modbus Temperature Humidity Sensor High-Accuracy SHT40 (January 1, 2025)NANO V3 USB-C (USB 2.0) Atmega328, CH340 (for Arduino) (January 1, 2025)WEMOS D1 Mini DS1307 RTC Shield (January 1, 2025)High Precision 1Hz Clock Generator / Time Base 3.8ppm 1024Hz output 3-5V (January 1, 2025)RP2040 Tiny 2MB Dev Module + USB Interface (January 1, 2025)LED Clock DIY Kit with Melody Alarm (option) (January 1, 2025)ESP32-C3 Super Mini Plus (V2) Development Module 4MB (January 1, 2025)HK66T-19 Melody Chip 'Für Elise' TO-92 (January 1, 2025)HK66T-OA Melody Chip 'Jingle Bells' TO-92 (January 1, 2025)2 pcs. 10-bit Breadboard Logic Level Indicator 3.3-5V - cascadable (January 1, 2025)HK66T-11 Melody Chip 'Love Me Tender' TO-92 (January 1, 2025)Permanent Breadboard XL - 1904 Tie Points (January 1, 2025)HK66T-08 Melody Chip 'Happy Birthday' TO-92 (January 1, 2025)CANADUINO® Permanent Breadboard S - 224 Tie Points - Set of 3 (January 1, 2025)Power Supply USB UART Module for CANADUINO® Permanent Breadboards (January 1, 2025)CANADUINO® Permanent Breadboard M - 464 Tie Points - Set of 3 (January 1, 2025)CANADUINO® Permanent Breadboard L - 1008 Tie Points - Set of 2 (January 1, 2025)USB Power Supply Cable 12V with DC Barrel Plug 2.1/5.5mm (January 1, 2025)Standard Test Leads for multimeter and power supplies (January 1, 2025)USB Power Supply Cable 5V with DC Barrel Plug 2.1/5.5mm (January 1, 2025)USB to 9V Power Supply Cable DC Barrel Plug 2.1/5.5mm (January 1, 2025)DDS Function Generator DIY Soldering Kit with LCD (January 1, 2025)Si4713 FM Stereo Transmitter Module with RDS (January 1, 2025)ESP8266 MicroPython Development Module (January 1, 2025)VS1053 Audio Codec MP3 Shield for Arduino UNO (January 1, 2025)SMD Tweezers Test Leads 50cm (January 1, 2025)Electronic Education DIY Kit "The broken code lock" (Troubleshooting Project) (January 1, 2025)Adjustable Clock Generator DIY Kit with NE555, 1Hz-1.5MHz (January 1, 2025)Burglar Alarm with Time Delay NE555 DIY soldering kit (January 1, 2025)Joystick Shield and Game Pad for Arduino UNO, MEGA (January 1, 2025)Superheterodyne 433MHz Transmitter Receiver Kit (January 1, 2025)Touch Sensor Light Switch with Off-Delay 0-60s DIY kit (January 1, 2025)Metal Detector DIY soldering kit - 60mm range (January 1, 2025)Police Emergency Flasher DIY Soldering Kit (January 1, 2025)IPS TFT display round 1.28 inch - 240x240 GC9A01 controller (January 1, 2025)INA3221 Module Triple Bus Current Voltage Monitor (January 1, 2025)400W LED Driver CC-CV and DC-DC Boost Converter (January 1, 2025)Battery Tester with LCD (January 1, 2025)ATGM336H GPS Module for Arduino Raspberry Pi etc. (January 1, 2025)PWM Motor Speed Controller DIY Learning Kit (January 1, 2025)Nordic nRF51822 Bluetooth BLE Microcontroller Module (January 1, 2025)Electronic Piano DIY Soldering Kit with Demo Songs (January 1, 2025)HDC1080 Sensor Module - High Precision Temperatu (January 1, 2025)In-Line DC Power Switch with Barrel Connector 2.1/5.5mm (January 1, 2025)2.42 inch OLED Graphic Display SSD1309 128x64 SPI (January 1, 2025)ICL8038 Signal Generator DIY Soldering Kit (January 1, 2025)Stereo TDA2030 Audio Amplifier DIY Kit, Tone control (January 1, 2025)Advanced SMD Soldering Practice Kit with NE555 (January 1, 2025)NANO V3 wireless Atmega328P + nRF24L01 - Arduino compatible (January 1, 2025)Audio Level Meter LM3915 with 10 LEDs DIY kit (January 1, 2025)Boost-Buck DC-DC Converter USB Input - 1.2-24V O (January 1, 2025)64Mbit SPI Flash Memory Module with W25Q64 (January 1, 2025)4 Port USB Hub Module Genesys Logic GL850G (January 1, 2025)FM Spy Microphone and FM Transmitter DIY Soldering Kit (January 1, 2025)2-Tone Door Bell DIY Soldering Kit with NE555 (January 1, 2025)Lithium Charger Booster Indicator - 5V - 2.1A (January 1, 2025)DC-DC Converter 200W - Output 1.25-36V adjustable, max. 8A (January 1, 2025)Programmable DC-DC Converter, Display 3A (January 1, 2025)USB 5V Power Supply DC-DC Converter 5A (January 1, 2025)AC-DC Power Supply 5V 3A DC - input 110/220VAC (January 1, 2025)320 pcs. Shrinking Tube Set, 1-14mm by 40-80mm (January 1, 2025)AC-DC Power Supply 12V 3A - input 110-240VAC (January 1, 2025)3 Sets of Stackable MEGA2560 Headers With Signal Print (January 1, 2025)AC-DC Power Supply 12V 2A DC - input 110/220VAC (January 1, 2025)LED Flasher with NE555 DIY Soldering Beginner Kit (January 1, 2025)8-Channel USB Logic Analyzer 24Msps (January 1, 2025)Audio Level LED VU Meter DIY Soldering Kit (January 1, 2025)12 LED Ring WS2812B RGB (January 1, 2025)Dual Axis Analog Joystick Module with push button function (January 1, 2025)LED Breathing Light STAR - SMD DIY soldering kit (January 1, 2025)24 LED Ring WS2812B RGB addressable, 86mm (January 1, 2025)LED Digital Hourglass DIY soldering beginner kit (January 1, 2025)Mini DC-DC Buck/Boost SEPIC Converter 3-15V, 600mA (January 1, 2025)MP3 player with 3W amplifier and micro-SD slot GPD2846A (January 1, 2025)Sound activated light effect - DIY kit with CD4017 (January 1, 2025)STM32 Black Pill STM32F411CEU6 100MHz - 512kB Flash (January 1, 2025)WEMOS D1 Mini Battery Shield V1.1.0 with 5V booster (January 1, 2025)RS232 to TTL adapter MAX232, provides RS232 port for MCU or Arduino (January 1, 2025)DAPLINK USB Programmer and Debugger for ARM, STM32 (January 1, 2025)4 Relay Module 10A / 250V Opto-Isolated Inputs 3-24V (January 1, 2025)IR Remote Control for Arduino and other platforms (January 1, 2025)32x8 Dot Matrix MAX7219 LED Red (January 1, 2025)3x4 Matrix Keypad, hard keys, black (January 1, 2025)LED and KEY Module for Arduino with TM1638 (January 1, 2025)5 pcs 50x70 mm Prototyping Perfboards (January 1, 2025)Waterproofing Cap for Toggle Switch MTS (January 1, 2025)16 LED Ring WS2812B RGB addressable, 68mm (January 1, 2025)Stackable 8-Ch. I2C Relay Shield DIY Kit for Arduino (January 1, 2025)Stackable 4-Ch. I2C Relay Shield DIY Kit for Arduino (January 1, 2025)40W+40W Bluetooth Amplifier - Enclosure - Remote (January 1, 2025)WEMOS D1 Mini DHT11 Temperature Humidity sensor (January 1, 2025)RP2040 Zero - Compatible with Raspberry Pi Pico (January 1, 2025)WEMOS D1 Mini DC Power Shield V1.1.0 (January 1, 2025)Digital Caliper 150mm - Carbon Fiber reinforced (January 1, 2025)10 x Crystal 77.503kHz for DCF77 (January 1, 2025)NTP Wi-Fi Clock with Alarm and App control (January 1, 2025)QMC5883L Triple Axis Magnetometer (compass) Sensor (January 1, 2025)Si5351A Clock Generator Module (January 1, 2025)256kbit FRAM Memory Module for Arduino (January 1, 2025)Attiny88 USB Development Module (January 1, 2025)OV2640 Wide Angle Camera Module 120° for ESP32-CAM (January 1, 2025)160 degrees OV2640 Fisheye Camera Module V1 (H) for ESP32 (January 1, 2025)3W+3W DIY Bluetooth Speaker Kit with acrylic enclosure (January 1, 2025)AHT20 + BMP280 sensor module replaces BME280 (January 1, 2025)USB 3.0 Tester for Voltage Capacity Current KCX-017 4-30V max. 3A (January 1, 2025)ESD Antistatic wrist strap for electronic repair (January 1, 2025)MCP2515 Can Bus Shield for Arduino UNO (January 1, 2025)MP3 Player Module SV17F with 4MB Flash and 5W Amplifier (January 1, 2025)AC LED Voltmeter Panel Mount 70-500 VAC (January 1, 2025)InvenSense MPU-6500 Module 6-Axis Gyro Accelerometer (January 1, 2025)FNIRSI 1014D Digital Oscilloscope with Function Generator (January 1, 2025)Adjustable Voltage Regulator DIY Kit LM317 1.25V to 12V - 1.5A (January 1, 2025)9V Battery Clip for Arduino Power Supply (January 1, 2025)Mini Toggle Switch MTS-103 - 3 Positions ON-OFF-ON (January 1, 2025)Exar XR-2206 Digital Function Generator DIY Kit (January 1, 2025)AOSONG AHT25 Sensor for Temperature and Humidity (January 1, 2025)3+3 Watt Class-D Audio Amplifier PAM8403 (January 1, 2025)Waterproof Push Button WHITE with M12 thread (January 1, 2025)Waterproof Push Button BLUE with M12 thread (January 1, 2025)Waterproof Push Button RED with M12 thread (January 1, 2025)Waterproof Push Button YELLOW with M12 thread (January 1, 2025)Waterproof Push Button BLACK with M12 thread (January 1, 2025)Waterproof Push Button GREEN with M12 thread (January 1, 2025)mini MP3 player module with microSD slot for Arduino etc. (January 1, 2025)3.7V Lithium Charger 1A - cell protection - Mini-USB (January 1, 2025)AOSONG AHT21 Precision Temperature and Humidity Sensor I2C (January 1, 2025)2-Channel Logic Level Converter 3.3V-5V with 3.3V LDO (January 1, 2025)ESP32-CAM with ESP32-CAM-MB USB Programming Adapter (January 1, 2025)EverSet ES100 WWVB BPSK Atomic Clock Starter Kit (January 1, 2025)4 x Solderless Mini Breadboard 170 tie points (January 1, 2025)Ai-Thinker ESP-01S Module ESP8266 1MB (January 1, 2025)Ai-Thinker ESP-01M ESP8285 with Adapter (January 1, 2025)NXP TEA5767HN FM Stereo Mini Radio Module (January 1, 2025)Pocket FM Stereo Radio DIY Soldering Kit 76-108MHz (January 1, 2025)FT232 USB UART Serial Adapter 3.3V / 5V (January 1, 2025)30W+30W Class-D Amplifier Module - Stereo - 8-26V (January 1, 2025)Automatic DC-DC Buck-Boost SEPIC Converter 10A, 1-30V (January 1, 2025)I2C to 16 Bit GPIO Expander PCF8575 (January 1, 2025)AM FM Radio DIY Kit CF210SP (January 1, 2025)USB-C Cable USB Type-C 2.0 90cm - 3ft (January 1, 2025)40 x DuPont Breadboard Wires 20cm F-F (January 1, 2025)40 x DuPont Breadboard Wires 20cm F-M (January 1, 2025)USB-C Breakout Board 24 Positions / Contacts (January 1, 2025)Cascadable I2C to GPIO Expander 8-64 Ports with PCF8574 (January 1, 2025)2.4GHz Antenna for Wi-Fi - Bluetooth - ZigBee (January 1, 2025)Battery Box 3xAA with Lid and Power Switch (January 1, 2025)40 x DuPont Breadboard Wires 20cm M-M (January 1, 2025)Mini-USB Cable 90cm - 3ft (January 1, 2025)DS18B20 Cable Sensor for Temperature (length: 3m) (January 1, 2025)AC-DC Converter 3.3V 1A - PCB Module 100-240V (January 1, 2025)Dual 18650 Battery Holder SMD PCB Mount (January 1, 2025)EverSet ES100-MOD WWVB BPSK Phase Modulation Receiver (January 1, 2025)PIR Mini Motion Sensor - 12mm Diameter - AM312 Chip (January 1, 2025)Carrier Board for EverSet ES100 Module - Breakout Board (January 1, 2025)20 x open Jumper Cap Shunt with Test Point (January 1, 2025)Arduino UNO Enclosure (Plastic, black) (January 1, 2025)10 x Jumper Cap Shunt with Handle - black (January 1, 2025)Lithium Battery Holder 2 x 18650, Open Wire Ends (January 1, 2025)18650 Charger Booster with 12V Output (January 1, 2025)Arduino UNO Acrylic Enclosure (January 1, 2025)Thru-Hole Lead Bender for Resistors Diodes Capacitors (January 1, 2025)Dual 18650 Lithium Charger Booster 3V 5V for 2 x 18650 (January 1, 2025)ESP-01 Programmer ESP-Link CP2104 V1.0 (January 1, 2025)Lithium Battery Holder 18650 with Open Wire Ends (January 1, 2025)Barrel DC Connector and Plug 2.1mm Panel Mount (January 1, 2025)SMD Holder 18650 Lithium Cell - PCB Mount (January 1, 2025)Lithium Battery Holder 4 x 18650 with Open Wire (January 1, 2025)STM32 Blue Pill - Black Pill Screw Terminal Adapter (January 1, 2025)DC-DC Boost Converter 6W 2.5-5V to 5V 8V 9V 12V - 6W (January 1, 2025)WeAct STM32F411CEU6 Black Pill V3.1 "Pro" 128M QSPI Flash (January 1, 2025)CP2102 USB UART Serial Interface 3.3V-5V (January 1, 2025)1.3 inch Display TFT IPS with ST7789 - 240x240 pixel - SPI (January 1, 2025)Arduino Nano Screw Terminal Adapter (January 1, 2025)AHT10 Sensor High-Precision Temperature Humidity - I2C (January 1, 2025)VL53L0X Time Of Flight Sensor - I2C (January 1, 2025)TCA9548A I2C Multiplexer for 8 I2C Channels - 1.65 to 5.5V (January 1, 2025)INA226 Current Sensor Module - High Precision (January 1, 2025)SI4432 LoRa Module 240-930MHz - up to 15km range (January 1, 2025)Digital LED Voltmeter 100V DC (red) 3-Digit 7mm (January 1, 2025)H-Bridge DC Motor Driver Module MX1616 (January 1, 2025)AD9833 Waveform Generator Module (January 1, 2025)Atomic Clock Antenna DCF77 (77.5kHz for Europe) (January 1, 2025)Mini DC-DC Converter 3A 2-20V (10W) (January 1, 2025)LED Battery Gauge for 1-8 Lithium Cells (January 1, 2025)LED Panel Meter 100V DC 10A Voltmeter Ammeter (January 1, 2025)20 Watt Stereo Bluetooth Amplifier Module with Acrylic Shell (January 1, 2025)Battery Box 4xAA with Switch (January 1, 2025)10 x Laser Diode 5mW 650nm for 5V DC with integrated resistor (January 1, 2025)9V Battery Snap Clip with Open Ends (January 1, 2025)10 x Tactile Push Button 6x6 mm short THD (January 1, 2025)PCB Buzzer Passive 12x9mm 42 Ohm (January 1, 2025)LED Clock Soldering Kit - Alarm, Temperature, Date, Light Effects (January 1, 2025)CANADUINO MEGA328 PLC-100 DIY Kit V2 (Arduino Nano PLC) (January 1, 2025)Double Sided Perforated Prototyping PCB 90 x 150 mm (January 1, 2025)3W AC-DC Converter 5V HLK-PM01 - 100-240VAC (January 1, 2025)4 x Double Sided Perforated Prototyping PCB 50 x 70 mm (January 1, 2025)10 x Breakaway Male Pin Header 1x40 pins - 2.54mm pitch (January 1, 2025)20 x Jumper Caps Black (January 1, 2025)BME280 Sensor Pressure - Temperature - Humidity - I2C, SPI - 3.3V (January 1, 2025)Arduino NANO to UNO Converter Module (January 1, 2025)LCD 2004 Acrylic Stand for 4x20 Dot-Matrix Displays (January 1, 2025)2 pcs. Relay Module 5V - max. load 10A / 250V - 5V logic level (January 1, 2025)DIY Electronic Piano Soldering Kit with NE555 (January 1, 2025)SX1278 LoRa Long Range Data Modem (January 1, 2025)2 x Rotary Encoder EC11B - Push Button - 7mm Thread (January 1, 2025)DIN Rail Mounting Kit for PLC-300 (January 1, 2025)SPI CAN Bus Interface with MCP2515 and TJA1050 (January 1, 2025)Chaser Light DIY Solder Learning Kit NE555 CD4017 (January 1, 2025)ESP32-CAM - WiFi Bluetooth BLE Module with 2MP Camera (January 1, 2025)LCD 1602 Blue, White Backlight - 2x16 Characters (January 1, 2025)16-Channel 12-bit PWM Servo Driver PCA9685 (January 1, 2025)SPI OLED 0.96 inch 128x64 - 3 to 5V (January 1, 2025)3.7V Lithium Charger USB-C - 1A Charge - 3A Output - Protection (January 1, 2025)Bluetooth 5.0 Audio Receiver with 3.5mm stereo output (January 1, 2025)4x4 Matrix Keyboard for Arduino Raspberry etc, Tactile Buttons (January 1, 2025)32x8 Dot Matrix MAX7219 LED Blue (January 1, 2025)ESP-01 Relay Module for ESP8266 10A 250V max. (January 1, 2025)Soil Moisture Sensor analog and digital out (January 1, 2025)PNP Output Proximity Sensor LJ12A3-4-Z-BY, 4mm Range (January 1, 2025)HiFi microphone module with MAX9814 amplifier (January 1, 2025)USB to RS485 4-Wire Interface (RS422 compatible) (January 1, 2025)RCWL-0516 Microwave Radar Occupancy Sensor Modul (January 1, 2025)MCP4725 DAC module 12 Bit with I2C interface (January 1, 2025)8x8 RGB LED Matrix with 64 x WS2812B - addressable (January 1, 2025)DC-DC Buck Converter 3.3V 1A - 78033 Replacement (January 1, 2025)3.5W AC-DC Converter 5V 700mA - 85-265VAC input (January 1, 2025)4 Channel L293D Motor Driver 4.5-25V DC - 600mA (January 1, 2025)4x4 Matrix Keypad - Plastic Black (January 1, 2025)WEMOS D1 R32 ESPDuino-32 Wi-Fi Bluetooth BLE Module (January 1, 2025)LOLIN32 Lite ESP32 MicroPython, Battery Charger (January 1, 2025)Atomic Clock Antenna 60kHz (WWVB, MSF, JJY60) (January 1, 2025)Square Wave Signal Generator 1Hz-150kHz / 0-100% Duty Cycle (January 1, 2025)Micro-SD Memory Card Adapter for Arduino with 3.3V-5V converter (January 1, 2025)DC-DC 5V Boost Converter from Single Battery, 0.9-5V input (January 1, 2025)4x4 RGB LED Matrix with 16 x WS2812B RGB - addressable (January 1, 2025)128x64 Graphic LCD LCM12864 (Green) SPI - ST7920 (January 1, 2025)8 RGB LED Strip WS2812B - addressable (January 1, 2025)D1 Mini ESP32 Minikit Dual Core 240MHz WiFi Bluetooth BLE (January 1, 2025)2x Wemos D1 Mini Prototyping Board – Double-Sided (January 1, 2025)DHT22 Temperature Humidity Sensor (January 1, 2025)Digital LED Voltmeter 100V DC (green) 3-Digit 7mm (January 1, 2025)4 x AA Battery Box, 25cm wires, open ends - 6V (January 1, 2025)Arduino Pro Mini 3.3V 8MHz Atmega328P (for Arduino IDE) (January 1, 2025)1.3 inch OLED I2C 128x64 3-5V (January 1, 2025)Allegro A3967 Motor Driver (stepper) Module Max (January 1, 2025)Wemos D1 Mini 8x8 LED Matrix Shield TM1640 (January 1, 2025)32x8 LED MAX7219 Dot Matrix Green (January 1, 2025)Arduino Pro Mini 5V - 16MHz Atmega328P (January 1, 2025)ADXL345 3-Axis Digital Accelerometer Module, I2C (January 1, 2025)Solar Panel 5V 500mW for DIY and Electronics Projects (January 1, 2025)5V Solar Panel 1W for DIY and Electronics Projects (January 1, 2025)LCD 2004A Green-Yellow, 4x20, Backlight, I2C optional (January 1, 2025)3 x Logic Level Converter 4-Channel 3.3V-5V (January 1, 2025)LCD 2004 Blue-White, 4x20, Backlight, I2C optional (January 1, 2025)MPR121 Capacitive Touch Sensor 12-Keys I2C 3.3V (January 1, 2025)8-digit serial LED 7-segment display MAX7219 - 9.5mm (January 1, 2025)NPN Output Proximity Sensor LJ12A3-4-Z-BX - 4mm Range (January 1, 2025)NodeMCU V3 Lua ESP8266 WiFi 4MB, USB, IoT (January 1, 2025)DC-DC Converter 5V 5A common GND, 9-35V input (January 1, 2025)D1 Mini Data Logger Shield with DS1307 RTC and micro-SD slot (January 1, 2025)CD74HC4067 Analog Multiplexer / Demultiplexer 16-Channel (January 1, 2025)HC-05 Bluetooth Module - Master-Slave (January 1, 2025)2 x nRF24L01 Mini Module 2.4GHz - 1.9-3.6V (January 1, 2025)ESP32 Devkit ESP-WROOM-32 - 4MB - CP2101 USB UART (January 1, 2025)4 digit 7-segment LED display, serial interface, TM1637 (January 1, 2025)Digital LED Clock Kit 6 digits with AT89C2051 soldering kit (January 1, 2025)Digital Temperature Cable Sensor DS18B20 watertight, 1m (January 1, 2025)SMD Soldering Practice Kit, LED Light Effects with NE555 (January 1, 2025)WEMOS D1 Mini Pressure Sensor with BMP180 (January 1, 2025)10+10 Watt Stereo Class-D Amplifier PAM8610 (January 1, 2025)Wemos D1 Mini Temperature Humidity Sensor SHT30 (January 1, 2025)Wemos D1 Mini OLED Display 0.66 inch with 64 x 48 pixel (January 1, 2025)SMD Soldering Practice Kit 0603 0805 1206 SOT-23 SOP16 (January 1, 2025)2.4 TFT Touch Display for Arduino UNO, MEGA (January 1, 2025)7805 Switching Regulator DC-DC Converter 5V 1A (January 1, 2025)LCD 1602 Acrylic Enclosure for 2x16 Character Display (January 1, 2025)Character LCD 1602 Green with Backlight 2x16 (January 1, 2025)WEMOS D1 Mini Tripler Base (January 1, 2025)I2C interface for LCD module - PCF8574 (A) (January 1, 2025)ADS1115 ADC Module 4-Channel 16-Bit I2C (January 1, 2025)WEMOS D1 Mini Relay Shield 250VAC 10A (January 1, 2025)Arduino MEGA 2560 R3 (compatible) with ATmega16u2 USB UART (January 1, 2025)CANADUINO MEGA 2560 R3 Enclosure (acrylic) (January 1, 2025)WEMOS D1 Mini Dual Base - takes 2 Stacks of D1 Mini Modules (January 1, 2025)WEMOS D1 Mini Motor Shield (January 1, 2025)120 pcs Ultimate Electrolytic Capacitor Kit (January 1, 2025)128x64 Graphic LCD (Blue) LCM12864 - SPI - ST7920 (January 1, 2025)Data Logger Module with DS1307 + Micro-SD, Battery Backup, I2C/SPI (January 1, 2025)Adjustable DC-DC Switching Converter 5A 75W, LED Display (January 1, 2025)ESP8266 NodeMCU DEVKIT, 4MB, CP2102 USB, IoT, Lua (January 1, 2025)2 Pcs. Super Tiny DC-DC Converter 1-17V 3A, 11 x 17mm (January 1, 2025)DC-DC Converter 5V 5A Output from 9-36V Input (January 1, 2025)NodeMCU ESP8266 WiFi 4MB + 32Mb, Lua + Arduino (January 1, 2025)RFID Starter Kit 13.56MHz, Keyfob, Code Card, RC522 (January 1, 2025)WEMOS D1 Mini ESP8266 WiFi IoT Module 4MB (January 1, 2025)ST-LINK V2 USB Programmer - Debugger (January 1, 2025)6 pcs. ESD SMD Electronics Tweezers, Anti-Static (January 1, 2025)DS3231 RTC Module with 32kB Memory, I2C, Battery Backup (January 1, 2025)InvenSense MPU-6050 6-Axis Gyro Accelerometer (January 1, 2025)OLED I2C 0.96 inch, 128x64 Pixel, SSD1306 SH1106, 3-5V (January 1, 2025)Digital LED Clock DIY Kit 4-Digits, Alarm Counter Countdown (January 1, 2025)Rain Drop Sensor analog and digital out for Arduino etc. (January 1, 2025)BMP280 Digital Pressure Sensor 1.8-3.6V, Barometer, Altimeter (January 1, 2025)HC-SR04 Ultrasonic Distance Sensor, 2cm-400cm Range (January 1, 2025)3.7V Lithium Charger 1A Charge - Protection - micro-USB (January 1, 2025)DHT11 Temperature Humidity Sensor 16bit (January 1, 2025)Solderless breadboard 400 - Adhesive Back - Detachable Power Lanes (January 1, 2025)USBtinyISP, ISP AVR programmer for Atmega Attiny (January 1, 2025)Arduino Nano V3 (compatible) Atmega328P + CH340 (January 1, 2025)600 pcs Through Hole Resistor Kit 1% - 250mW - 30 Values (January 1, 2025)100 x LED Yellow 3mm Round (January 1, 2025)100 x LED Blue 3mm Round - Tinted - Clear - Standard Package T-1 (January 1, 2025)100 x Red LED 3mm Round - Tinted - Clear - Standard Package T-1 (January 1, 2025)100 x LED Green 3mm Round - Tinted - Clear - Standard Package T-1 (January 1, 2025)Large Solderless Breadboard 830 - Adhesive Back - Detachable Power Lanes (January 1, 2025)Arduino MEGA 2560 (compatible) CH340 USB UART (January 1, 2025)WEMOS D1 ESP8266 WiFi Development Board (January 1, 2025)CANADUINO Breadboard Power Supply 3.3V, 5V, 12V with USB TTL UART (January 1, 2025)Noise Sensor adjustable trigger output for Arduino (January 1, 2025)Automatic Arduino Bootloader Programmer for Atmega328P (January 1, 2025)100 x LED White 3mm Round - Water Clear - Standard Package T-1 (January 1, 2025)Arduino Pro Micro 5V 16MHz (compatible). Atmega32u4 (January 1, 2025)60kHz Atomic Clock Receiver V4 (WWVB, MSF, JJY60) (January 1, 2025)Attiny85 Kickstarter Dev Board (January 1, 2025)DCF77 Atomic Clock Receiver V4 77.5kHz for Europe (January 1, 2025)nRF24L01+PA+LNA 2.4GHz wireless data modem 1100 m (January 1, 2025)2 Relay Module 10A / 250V - Opto-Insulated Input (January 1, 2025)8 Relay Module Shield 10A with Optocoupler Input (January 1, 2025)10 x Atmega328P with bootloader DIP-28 for Arduino UNO R3 (January 1, 2025)Atmega328 Programmer Shield for Arduino UNO - DIY Kit (January 1, 2025)Arduino UNO R3 (compatible) Atmega328P with CH340 USB (January 1, 2025)Arduino UNO R3 Atmega16u2 (compatible) (January 1, 2025)CH340 USB UART Interface for Communication (January 1, 2025)Enclosure for Arduino Pocket Calculator DIY Kit - 3D printed (December 18, 2024)Atmega328P-PU Arduino bootloader installed DIP-28 (January 1, 2024)RFID Tag 13.56MHz Keyfob - NFC / ISO14443 compatible - Set of 5 (September 24, 2023)Mini Toggle Switch MTS-202 - 2 Phase - 2 Positions ON-OFF (February 3, 2023)Mini Toggle Switch MTS-102 - 1 Phase - 2 Positions ON-OFF (February 3, 2023)CANABLOX® Permanent Breadboard size 'L' (CX-PBB-L) Set of 2 (September 22, 2020)CANABLOX® Permanent Breadboard size 'MV' (CX-PBB-MV) Set of 2 (September 22, 2020)CANABLOX® Permanent Breadboard size 'MH' (CX-PBB-MH) Set of 2 (September 22, 2020)CANABLOX® Permanent Breadboard size 'S' (CX-PBB-S) Set of 2 (September 22, 2020)CANABLOX® Mounting Hardware Kit for 5 modules (CX-HARD5) (September 22, 2020)CANABLOX® Unused Slot Cover (CX-FILL-S) Set of 5 (September 21, 2020)CANABLOX® Base 'L' with 4x4 Module Slots (CX-BASE-L) (September 20, 2020)CANABLOX® Base 'M' with 3x3 Module Slots (CX-BASE-M) (September 20, 2020)CANABLOX® Base 'S' with 2x2 Module Slots (CX-BASE-S) (September 20, 2020)CANABLOX® Base 'V' with 2x4 Module Slots (CX-BASE-V) (September 20, 2020)CANABLOX® Base 'H' with 4x2 Module Slots (CX-BASE-H) (September 20, 2020)CANABLOX® XIAO MCU Module Carrier I2C (CX-XIAO-S) (September 20, 2020)CANABLOX® XIAO Screw Terminal Module (CX-XIAO-MH) (September 20, 2020)CANABLOX® RGBCIR Color Sensor I2C (CX-VEML3328-S) (September 20, 2020)CANABLOX® Stemma - Qwiic - Grove - Converter I2C (CX-SQG-S) (September 20, 2020)CANABLOX® I2C Pull-Up Resistor Module 2.2k (CX-PULLUP-S) (September 20, 2020)CANABLOX® 2:1 Channel I2C Bus Multiplexer (CX-MUX-S) (September 20, 2020)CANABLOX® 16-Channel GPIO Expander I2C (CX-MCP23017-MH) (September 20, 2020)CANABLOX® 4-Channel 12-Bit DAC I2C (CX-MCP4728-S) (September 20, 2020)CANABLOX® Single-Channel 12-Bit DAC I2C (CX-MCP4725-S) (September 20, 2020)CANABLOX® 9x16 / 144 LED Matrix Display I2C Red (CX-LEDMX-MH) (September 20, 2020)CANABLOX® 4 x 16 Characters LCD Module I2C (CX-LCD164-L) (September 20, 2020)CANABLOX® 16-Key 0-9, A-F Hexadecimal Keypad I2C (CX-KEYPAD-S) (September 20, 2020)CANABLOX® I2C External Power Injector (CX-INJECT-S) (September 20, 2020)CANABLOX® 10-Channel GPIO Status Indicator Module (CX-INDICA-MV) (September 20, 2020)CANABLOX® Current Sensor Module I2C 0.0003mA to 1000mA (CX-INA219-S) (September 20, 2020)CANABLOX® WWVB-BPSK Atomic Clock Receiver ES100 I2C (CX-ES100-MH) (September 20, 2020)CANABLOX® 1Mbit EEPROM Module I2C (CX-EEPROM-S) (September 20, 2020)CANABLOX® High-Precision Real-Time-Clock Module I2C (CX-DS3231-S) (September 20, 2020)CANABLOX® Temperature-Humidity-Pressure-Gas Sensor Module I2C (CX-BME680-S) (September 20, 2020)CANABLOX® DC-DC Converter Module 6-15V to 3.3V/5V (CX-DCDC-S) (September 20, 2020)CANABLOX® Temperature-Humidity-Pressure Sensor Module I2C (CX-BME280-S) (September 20, 2020)CANABLOX® ATmega328 MCU Module for Arduino (CX-AT328-MH) (September 20, 2020)CANABLOX® 3-Axis Accelerometer I2C (CX-ADXL345-S) (September 20, 2020)CANABLOX® 4-Channel 16-Bit ADC I2C (CX-ADS1115-S) (September 20, 2020)CANABLOX® 6-Digit 7-Segment Display I2C (CX-6X7SEG-MH) (September 20, 2020)CANABLOX® Dual UART Serial Interface Module I2C (CX-2UART-S) (September 20, 2020)CategoriesComparisonsDisplaysMicrocontrollersPower & VoltageSensorsTime, RTC & ClocksTroubleshootingWired CommunicationWireless CommunicationProduct categoriesAmazon BundlesAtomic Clock Receiver77.5kHz, 60kHz AM Receiver60kHz WWVB BPSKCANABLOX®Clear OutData CommunicationBluetooth / BLERFID, IRRF Data Comm, GPSWired ConnectionDev BoardsESP32, ESP8266 etc.D1 Mini AccessoriesRaspberry PiSTM32 ModulesArduino DevelopmentShields for ArduinoElectronic DIY KitsLevel: TinkererLevel: GuruLevel: NewbieElectronic ModulesMemoryTimer, Clock, GeneratorSound - 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## Products
- [Seeed Studio XIAO MG24](https://www.universal-solder.ca/product/seeed-studio-xiao-mg24/): XIAO MG24 low-power wireless development board based on the Silicon Labs EFR32MG24 SoC. It combines a modern 32-bit Arm Cortex-M33 processor with 2.4 GHz wireless connectivity.
- [Seeed Studio XIAO SAMD21](https://www.universal-solder.ca/product/seeed-studio-xiao-samd21/): XIAO SAMD21 module is a 32-bit Arm Cortex-M0+ processor running at up to 48 MHz. It includes 256 KB Flash memory and 32 KB SRAM.
- [MQ-135 Air Quality Sensor](https://www.universal-solder.ca/product/mq-135-air-quality-sensor/): The MQ-135 Air Quality Sensor is a low-cost semiconductor gas sensor for general air-quality and pollution-gas detection. It is suitable for hobby electronics, Arduino projects, ESP32 projects, air-quality experiments, gas alarm prototypes, and educational sensor demonstrations.
- [MQ-7 Carbon Monoxide Sensor](https://www.universal-solder.ca/product/mq-7-carbon-monoxide-sensor/): The MQ-7 Carbon Monoxide Sensor is a low-cost semiconductor gas sensor designed for detecting carbon monoxide (CO) in air. It is suitable for hobby electronics, Arduino projects, ESP32 projects, educational experiments, CO detector prototypes, and general gas-sensing demonstrations.
- [MQ-3 Alcohol Sensor](https://www.universal-solder.ca/product/mq-3-alcohol-sensor/): The MQ-3 Alcohol Sensor is a low-cost semiconductor gas sensor designed for detecting alcohol vapour in air. It is suitable for hobby electronics, Arduino projects, ESP32 projects, educational experiments, alcohol detector prototypes, and general gas-sensing demonstrations.
- [MQ-2 Sensor for Combustible Gases and Smoke](https://www.universal-solder.ca/product/mq-2-sensor-for-combustible-gases-and-smoke/): MQ-2 Sensor is a gas sensor for detecting combustible gases and smoke. It is commonly used in gas leakage alarms, smoke detection experiments and air monitoring projects.
- [0.96 inch IPS TFT Display with ST7735S - 80x160 pixel - SPI](https://www.universal-solder.ca/product/0-96-inch-ips-tft-display-with-st7735s-80x160-pixel-spi/): 0.96 inch IPS TFT display for microcontroller and embedded projects. It provides an 80 x 160 pixel RGB display area and uses the ST7735S display driver IC with an SPI interface.
- [PCM5102 pHAT I2S Sound Card for Raspberry Pi](https://www.universal-solder.ca/product/pcm5102-phat-i2s-sound-card-for-raspberry-pi/): PCM5102A I2S stereo Sound Card for Raspberry Pi also works with other 3.3V development module with I2S output, like ESP32, RP2040 or STM32.
- [MAX98357 Class-D Amplifier 3W - I2S interface](https://www.universal-solder.ca/product/max98357-class-d-amplifier-3w-i2s-interface/): MAX98357 Class-D Amplifier module for microcontroller and single-board computer audio projects with I2S input.
- [OLED 0.96 inch with 4 buttons and I2C interface - blue](https://www.universal-solder.ca/product/oled-0-96-inch-with-4-buttons-and-i2c-interface-blue/): 0.96-inch OLED display module combines a compact 128 x 64 pixel PMOLED screen with four integrated push buttons on one PCB.
- [Universal DIN Rail Mounting Kit for 50x75mm Electronic Modules](https://www.universal-solder.ca/product/universal-din-rail-mounting-kit-for-electronic-modules/): 35mm DIN rail mounting kit for 50x75mm electronic modules and PCBs. Black plastic holder with screw tabs for flat-surface mounting.
- [Universal Screw Terminal Adapter DIY Soldering Kit for Development Modules](https://www.universal-solder.ca/product/universal-screw-terminal-adapter-diy/): For modules with up to 2x20 pins and row spacing 15.24 mm, 17.78 mm, 20.32 mm, 22.86 mm, 25.4 mm, and 27.94 mm (600-1100 mil).
- [Seeed Studio XIAO ESP32C5 Dual-Band](https://www.universal-solder.ca/product/seeed-studio-xiao-esp32c5-dual-band/): Seeed Studio XIAO ESP32C6 is powered by the highly-integrated ESP32-C6 SoC, built on two 32-bit RISC-V processors, with a high-performance processor with running up to 160 MHz, and a low-power 32-bit RISC-V processor, which can be clocked up to 20 MHz.
- [NodeMCU V3 ESP8266 with OLED display USB-C](https://www.universal-solder.ca/product/nodemcu-v3-esp8266-with-oled-display-usb-c/): ESP8266 development board combines WiFi, 0.96 inch OLED display, and USB-C interface in one compact module.
- [Bluetooth 4.2 BLE Serial Module I2C UART SPI](https://www.universal-solder.ca/product/bluetooth-4-2-ble-serial-module-i2c-uart-spi/): BLE Serial Module I2C is a compact Bluetooth Low Energy (BLE) wireless communication module designed to add low-power 2.4 GHz connectivity to embedded systems.
- [2.13 inch 3-color ePaper Module SPI, Black White Red](https://www.universal-solder.ca/product/2-13-inch-3-color-epaper-module-spi-black-white-red/): 2.13 inch 3-color ePaper display module features a 212x104 pixel resolution and supports black and red output on white background.
- [1.54 inch ePaper display 200x200, SPI, black/white](https://www.universal-solder.ca/product/1-54-inch-epaper-display-200x200-spi-black-white/): 1.54 inch ePaper display 200x200 SPI black white e-ink module Arduino ESP32 Raspberry Pi low power electronic ink screen
- [INMP441 digital MEMS microphone omnidirectional I2S](https://www.universal-solder.ca/product/inmp441-digital-mems-microphone-omnidirectional-i2s/): Compact INMP441 digital MEMS microphone module on a 14mm round PCB, designed for clean audio capture with microcontrollers and SBCs using an I2S interface.
- [9V Battery Holder for 6F22 and compatible batteries - open wire ends](https://www.universal-solder.ca/product/9v-battery-holder-for-6f22-and-compatible-batteries-open-wire-ends/): Battery holder for 1 x 9V block battery 6F22 (and similar). Open wire ends for soldering.
- [CANADUINO® EverSet ES100 ADK V2 Atomic Clock DIY kit for WWVB-BPSK](https://www.universal-solder.ca/product/everset-es100-atomic-clock-receiver-adk-diy-soldering-kit/): The ES100 ADK V2 is an exclusive tool for engineers to create WWVB BPSK "atomic clock" applications. Pre-programmed Arduino compatible Atmega328P-PU included.
- [CANADUINO Arduino Pocket Calculator DIY Kit](https://www.universal-solder.ca/product/canaduino-arduino-pocket-calculator-diy-kit/): The CANADUINO DIY Pocket Calculator Kit combines 10-digit 5×5 LED matrix with an ATmega328P microcontroller. The kit includes pre-assembled surface-mount components and requires through-hole component assembly by the customer.
- [10 pcs Stackable Long-Lead Female Headers (8-pin) for D1 Mini Shields](https://www.universal-solder.ca/product/10-pcs-stackable-long-lead-female-headers-8-pin-for-d1-mini-shields/): The D1 Mini system allows for easy stacking of multiple modules, if the right female headers are used.
- [CANADUINO D1 Mini Keypad / JoyPad I2C](https://www.universal-solder.ca/product/canaduino-d1-mini-keypad-joypad-i2c/): D1 Mini Keypad / JoyPad module adds six tactile buttons to your D1 Mini. Ideal user interface for menus, games, or control applications.
- [CANADUINO D1 Mini ADS1115 ADC (4 Channel, 16Bit, I2C)](https://www.universal-solder.ca/product/canaduino-d1-mini-ads1115-adc-4-channel-16bit-i2c/): The CANADUINO® D1 Mini ADS1115 module adds four 16‑bit precision analog inputs to your D1 Mini setup.
- [CANADUINO D1 Mini GPIO Expander I2C 8-Channel](https://www.universal-solder.ca/product/canaduino-d1-mini-gpio-expander-i2c-8-channel/): The CANADUINO® D1 Mini 8-Channel GPIO Expander adds 8 extra digital input/output pins to your D1 Mini setup.
- [Seeed Studio XIAO nRF52840](https://www.universal-solder.ca/product/seeed-studio-xiao-nrf52840/): The XIAO nRF52840 packs Bluetooth 5.0, NFC, and powerful processing into a compact, low-power module. The Nordic nRF52840 MCU uses a 32-bit ARM Cortex-M4 running at up to 64 MHz with hardware floating point unit.
- [Seeed Studio XIAO RP2040](https://www.universal-solder.ca/product/seeed-studio-xiao-rp2040/): The Seeed Studio XIAO RP2040 is powered by a dual-core ARM Cortex-M0+ processor running up to 133 MHz, with 264 KB of SRAM and 2 MB of onboard flash memory for storage of firmware and data. GPIO pins include 4 analog inputs and interfaces for I²C, SPI, UART.
- [Seeed Studio XIAO RP2350](https://www.universal-solder.ca/product/seeed-studio-xiao-rp2350/): The Seeed Studio XIAO RP2350 is built for developers who want more power, more I/O, secure operation, and very low power draw. The heart of the module is the RP2350 chip, which features dual Arm Cortex-M33 cores running at up to 150 MHz with floating point support.
- [Seeed Studio XIAO RA4M1](https://www.universal-solder.ca/product/seeed-studio-xiao-ra4m1/): The Seeed Studio XIAO RA4M1 is a capable MCU module around the Renesas RA4M1 microcontroller. It packs powerful features into a thumb-sized design.
- [Seeed Studio XIAO ESP32S3](https://www.universal-solder.ca/product/seeed-studio-xiao-esp32s3/): The Seeed Studio XIAO ESP32S3 is a powerful MCU module designed for wireless and AI-driven applications. It integrates dual-core processing power, abundant memory, and versatile connectivity.
- [3x AA Battery Holder, open wire ends](https://www.universal-solder.ca/product/3x-aa-battery-holder-open-wire-ends/): The 3 cells are connected in series for a total of 4.5V. Dimensions: 58 x 47 x 14 mm
- [Osram SCD55100A intelligent 10-digit Dot-Matrix Display (red) and socket DIP-28](https://www.universal-solder.ca/product/osram-scd55100a-intelligent-10-digit/): The SCD55100A Intelligent LED Display is a 10-digit, 5×5 dot matrix display with serial interface, integrated controller and DIP-28 form factor.
- [WEMOS D1 Mini ESP8266 V4.0.0 with USB Type-C](https://www.universal-solder.ca/product/wemos-d1-mini-esp8266-v4-0-0-with-usb-type-c/): New version of the popular D1 Mini IoT module with USB-C port and I2C bus connection for accessories. Operates as access point, webserver or client.
- [Temperature Monitoring with Alarm DIY Soldering Kit](https://www.universal-solder.ca/product/temperature-monitoring-with-alarm-diy-soldering-kit/): Adjustable temperature monitoring with acoustic alarm. This DIY soldering kit for beginners requires 5V power supply.
- [50 pcs. M3 PCB Mounting Hardware Kit Black Plastic](https://www.universal-solder.ca/product/m3-pcb-mounting-hardware-kit-black-plastic/): 50 pieces M3 Mounting Hardware for PCB, black plastic
- [5 x I2C cable 10cm for STEMMA QT / Qwiic / CANABLOX](https://www.universal-solder.ca/product/5-x-canaduino-i2c-cable-10cm-compatible-with-stemma-qt-qwiic-canablox/): 5 x CANADUINO I2C cable 10cm compatible with STEMMA QT / Qwiic / CANABLOX
- [5 x I2C cable 5cm for STEMMA QT / Qwiic / CANABLOX](https://www.universal-solder.ca/product/5-x-canaduino-i2c-cable-5cm-compatible-with-stemma-qt-qwiic/): 5 x CANADUINO I2C cable 5cm compatible with STEMMA QT / Qwiic / CANABLOX
- [CANADUINO PLC-100 DIN Rail Mounting Kit](https://www.universal-solder.ca/product/din-rail-mounting-kit-for-plc-100-series/): For professional installation of a CANADUINO PLC-100 Series logic controller module. Snaps right onto a standard 35mm DIN Rail.
- [10 pcs. M3 Nut - Plastic Mounting Hardware](https://www.universal-solder.ca/product/10-pcs-m3-nut-plastic-mounting-hardware/): 10 pcs. M3 Nut - Plastic Mounting Hardware
- [10 pcs. M3 Standoff 12+6mm - Plastic Black](https://www.universal-solder.ca/product/10-pcs-m3-standoff-126mm-plastic-mounting-hardware/): 10 pcs. M3 Standoff 12+6mm - Plastic Mounting Hardware
- [10 pcs. M3 Spacer 12mm - Plastic Mounting Hardware](https://www.universal-solder.ca/product/10-pcs-m3-spacer-12mm-plastic-mounting-hardware/): 10 pcs. M3 Spacer 12mm - Plastic Mounting Hardware
- [10 pcs. M3 Spacer 8mm - Plastic Mounting Hardware](https://www.universal-solder.ca/product/10-pcs-m3-spacer-8mm-plastic-mounting-hardware/): 10 pcs. M3 Spacer 8mm - Plastic Mounting Hardware
- [10 pcs. M3 Screw 6mm - Plastic Mounting Hardware](https://www.universal-solder.ca/product/10-pcs-m3-screw-6mm-plastic-mounting-hardware/): 10 pcs. M3 Screw 6mm - Plastic Mounting Hardware
- [FM Stereo Radio DIY Kit with LED Display and Headphone Jack](https://www.universal-solder.ca/product/fm-stereo-radio-receiver-diy-soldering-kit-with-led-display-and-headphone-jack/): DIY FM radio soldering kit with LED and Stereo Headphone Jack and speaker output. Tune from 87 to 108 MHz. A few SMD components require soldering.
- [1.77 inch Display TFT IPS with ST7735 - 128x160 pixel - SPI](https://www.universal-solder.ca/product/1-77-inch-display-tft-ips-with-st7735-128x160-pixel-spi/): 1.77 inch Display with 128x160 resolution, ST7735S controller, SPI interface, and 3.3V operation—ideal for compact embedded displays.
- [DC-DC Buck-Boost Converter Module 0.5-30V, 4A - Panel Mount](https://www.universal-solder.ca/product/dc-dc-buck-boost-converter-module-0-5-30v-4a-panel-mount/): Panel-mount DC-DC Buck-Boost Converter Module with 5–30V input, 0.5–30V output, up to 4A current, and comprehensive protection features.
- [Stand-Alone MP3 Player Solution with Amplifier and Audio-Out](https://www.universal-solder.ca/product/stand-alone-mp3-player-solution-with-amplifier-and-audio-out/): Standalone MP3 player with USB, microSD, onboard amp, speaker output, and playback buttons. Powered by 3.7–5.5V DC, ideal for embedded audio.
- [Square Wave Frequency PWM Generator 1Hz-150kHz](https://www.universal-solder.ca/product/square-wave-frequency-pwm-generator-1hz-150khz/): Panel-mounted PWM signal generator with adjustable frequency (1Hz–150kHz) and duty cycle (0%–100%), operating on 3.3V–30V DC with LCD display and TTL interface.
- [200pcs M3 Brass Spacer - Standoff - Nut - Screw Kit](https://www.universal-solder.ca/product/200pcs-m3-spacer-standoff-nut-screw-kit/): 200 pcs M3 mounting hardware for CANADUINO modules and DIY kits with 3.2mm mounting holes. Spacers, standoffs, nuts and screws.
- [High Accuracy (0.1°C) Temperature Controller 110-220V 10A/20A](https://www.universal-solder.ca/product/high-accuracy-0-1c-temperature-controller-110-220v-10a-20a/): Digital temperature controller with dual LED display, supporting AC 110–220V input, 10A relay output, and both heating and cooling modes for precise temperature management.

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