Introduction - If you have any usage issues, please Google them yourself
51 single-chip timer to design a digital clock with full clock function (automatically updated and displayed, minutes, seconds, month, day), using the 1602 LCD, using matrix keyboard and a separate keyboard is divided into the corresponding button, the available timeregulation. With alarm clock function, set the alarm time from time from the downtown. Has since the alarm time set, change, alarm clock, open, close functions