This product is a 4-digit electronic clock kit that requires welding and assembly by yourself. It is suitable for installation and study by electronic enthusiasts and major electronic vocational schools.
The program for the microcontroller has passed the exam, and no electronic version of the program be provided.
Power supply: DC3.7V-5.5V
Special reminder: If you use it for a long time, it is recommended to use a DC power supply, because if you use ordinary 3 AA batteries, it consume power quickly and is not suitable for long-term use.
Function introduction: 1. Normal running time, hours and minutes display. 2. Hours and minutes are independently adjustable.

3. Time second correction function.
4. You can fine-tune the speed of the clock, 0--9 levels are adjustable, the default is level 5.
5. Two-way alarm clock, and the alarm switch can be set independently.
6. The hourly reminder function can be turned off and on.
7. Equipped with a battery interface, which can run time when the power is turned off. The battery only needs to be 3V to running time after power failure. You can use two AA batteries, three AA batteries, or mobile phone batteries.
8. The function can be realized within 99 minutes and the alarm end.
9. Stopwatch function, which can realize the stopwatch function, pause the stopwatch, and clear the stopwatch.
10. It can realize the counter function and record the number of key presses. The number of external pulses can also be recorded.
Material: plastic
colour: As Shown
size: about 53 x 40mm

Package Contents:
1 x Electronic Clock DIY Kit