Introduction - If you have any usage issues, please Google them yourself
Combined with keyboard, digital control and other peripherals, the use of 51 single-chip microcomputer to achieve some of the identified, practical function.
Procedures can be implemented as follows:
clock display and adjustment:
date display and regulation:
alarm clock display and settings:
The clock is the same as the alarm clock, and the buzzer rings
stopwatch start stop and cleared: