This very easy to build beginners kit resembles a hour glass, with sand running through. The program is stored in a 8051 compatible micro controller. A button controls the speed of the “sand” running through.
This kit needs 5V power supply.
Size of the PCB: 40 x 84mm
The kit is a “no-brainer” and shipped without any additional instructions, since the silk screen on the PCB clearly shows where to place the components. Just make sure the LEDs are in the right polarity: It is shown on the silkscreen, where the flat spot of the LED lens goes.