用51单片机STC5A60S2做的一个时间表功能简单实用，利于学习-With a timetable 51 MCU STC5A60S2, simple, practical, and conducive to learning

CS550做的感量1毫克电子称，用于库仑力演示，用STC5A60S2单片机。-CS550 make sense of the amount of 1 mg electronics, for Coulomb force demonstration, with STC5A60S2 microcontroller.