基于555和单片机的RC测量系统设计

Design of RC Measurement System Based on 555 Chip and SCM

介绍了一种基于555定时器和单片机的数显式电阻和电容测量系统设计。系统利用555和待测电阻或电容组成多谐振荡器,通过单片机测量555输出信号的周期,根据周期与待测电阻或电容的数学关系计算出电阻或电容值,再将之在LCD1602上显示出来。

It introduces the design of a digital resistance and capacitance measurement system based on SCM and 555 chip.The system uses the 555 chip and the unknown resistance or capacitance to build a muhivibrator.The resistance（or capacitance）can be calculated according to the relationship between resistance（or capacitance）and the output signal cycle of the 555 chip which is measured by SCM timer, and then the value is displayed on LCDI602.