Introduction - If you have any usage issues, please Google them yourself
602 liquid crystal display calendar
The use of single-chip microcomputer timer, through software programming to achieve the year, month, day, week, hours, minutes, seconds, 7 parameters of the operation.
According to the end date, Xiaoyue display.
According to the 24 hour system shows hours, minutes, seconds.
Through the 2 external independent keyboard implementation date and time adjustment of calendar .