How to use C51 4 Bits Digital Electronic Clock DIY Kit

This is a very popular digital click for beginners. It is a DIY Kit. It is now available at BuildCircuit Store. It is based on AT89C2051-24PU.

Basic Functions:

1. Hour and minute display & minute and second display

2. Two alarms set up

There is a buzzer that works as an alarm. When the clock reaches hours…like 1:00, 12:00, etc., it will beep for 3 times. The alarm beep is optional, you can disable it.

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