精选优质文档-倾情为你奉上Presented in this paper is a design of pulse measuring instrument based on MCU, as the circuit module plays an important role in the system, such as heart rate acquisition circuit, display circuit and STC89C52 microcontroller through the serial port to realize the connection. This design with STC89C52 microcontroller as the central control unit, through ST188 as infrared photoelectric sensor to collect the pulse signal, after the lm358 for op amp; again through before and af
