多功能电子时钟，配合普中科技的开发板，虽说普中很渣，但懒得搭电路了，在板子接线上稍有改动，参考了宋老师的书，可以显示时间，温度，可校时(The multifunctional electronic clock, with the development board of puzhong, though it is very weak, i am too lazy to take the circuit. There is a slight change in the board wiring.