Time, RTC & Clocks

Helpful information about timekeeping components including RTC modules such as DS1307 and DS3231, as well as atomic clock technology and synchronization methods.

MAS6180C Atomic Clock Receiver: Reliable AM Time Signal Reception

The MAS6180C is one of the most widely used integrated circuits for receiving long-wave atomic clock signals such as WWVB, MSF, JJY and DCF77. It is specifically designed for low-frequency time signal reception and offers excellent sensitivity and stability when used with a proper antenna. This chip is at the heart of many reliable radio-controlled […]

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Testing and Measuring Clock Accuracy: ppm, Drift and Logging Methods

Designing a clock system is only half the job. To ensure reliable performance, it is important to measure and verify its accuracy over time. This involves understanding drift, calculating ppm (parts per million) and using proper logging methods. This article explains how to evaluate the accuracy of your clock system in a practical and meaningful

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WWVB-BPSK and the EverSet ES100: Modern Atomic Clock Reception

Traditional atomic clock receivers rely on amplitude modulation (AM) to decode time signals such as WWVB. While this method works well under good conditions, it is often unreliable indoors or in electrically noisy environments. Modern receivers based on WWVB-BPSK (Binary Phase Shift Keying), such as the EverSet ES100, represent a major improvement in reliability and

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GPS Time Reception: Accurate Time Without Internet

GPS (Global Positioning System) is not only used for location tracking but also provides extremely accurate time information. Every GPS satellite carries atomic clocks, allowing receivers to derive precise time anywhere in the world. This makes GPS one of the most powerful and globally available time synchronization methods for electronic systems. How GPS Provides Time

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Handling Power Loss and Time Recovery in Embedded Systems

Many embedded systems must continue operating correctly after a power failure, battery change or unexpected reset. If the system depends on accurate time, losing power can create serious problems unless time recovery is handled properly. This article explains how to design systems that recover time reliably after power loss using RTCs, backup batteries and external

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Internet Time with NTP: Using WiFi and Ethernet for Time Synchronization

For connected devices, one of the easiest and most flexible ways to obtain accurate time is through the internet using the Network Time Protocol (NTP). This method is widely used in IoT devices, servers and embedded systems with network connectivity. NTP allows devices to synchronize their internal clocks with highly accurate time servers distributed around

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Atomic Clock Receiver Output Signals: Pulse Timing, Decoding and Microcontroller Input

Atomic clock receiver modules make it possible to synchronize a microcontroller project with national time signals such as WWVB, DCF77, MSF or JJY. While the radio technology behind these signals can be complex, many receiver modules provide a simple digital output that can be read by a microcontroller. This article explains what comes out of

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