Table of contents
1. Schematic diagram and introduction of knowledge points
foreword
The first experiment: 51 single-chip microcomputer (Puzhong HC6800-EM3 V3.0) experimental routine software analysis experiment one point lights up the first LED_ManGo CHEN's Blog-CSDN Blog
The second experiment: 51 single-chip microcomputer (Puzhong HC6800-EM3 V3.0) experimental routine software analysis experiment 2 LED flicker_ManGo CHEN's Blog-CSDN Blog
The third experiment: 51 single-chip microcomputer (Puzhong HC6800-EM3 V3.0) experimental routine software analysis experiment three LED water lights_ManGo CHEN's Blog-CSDN Blog
The fourth experiment: 51 single-chip microcomputer (Puzhong HC6800-EM3 V3.0) experimental routine software analysis experiment four buzzers_ManGo CHEN's Blog-CSDN Blog
Experiment 5: Relay
1. Schematic diagram and introduction of knowledge points
1.1. Relay schematic diagram:
The relay circuit is as follows:
The principle of the relay refers to the following blog post: SCM_CT107D training platform circuit schematic diagram\Blue Bridge Cup training board\input and output module\matrix button\buzzer circuit\relay circuit\LM386 power amplifier circuit, drive speaker_ct107d MCU_ ManGo CHEN's Blog - CSDN Blog
2. Code Analysis
Let me introduce the project first:
Let's go directly to the code:
/**************************************************************************************
* 继电器实验 *
实现现象：下载程序后继电器模块指示灯DK亮，会听到继电器吸合的声音
注意事项：无
***************************************************************************************/
#include "reg52.h" //此文件中定义了单片机的一些特殊功能寄存器
typedef unsigned int u16; //对数据类型进行声明定义
typedef unsigned char u8;
sbit relay=P1^4;
/*******************************************************************************
* 函 数 名 : main
* 函数功能 : 主函数
* 输 入 : 无
* 输 出 : 无
*******************************************************************************/
void main()
{
relay=0;
while(1);
}
The program here is very simple. This section is mainly the understanding of the relay circuit: it can be seen that when the relay is 0, the J2 port in the schematic diagram is at a low level, so that the Q1 transistor is turned on, and the relay coil is turned on and closed. , so that the normal opening is closed to achieve the effect of the switch being closed.