14-RTC

IR decoding digital display

基于AD8402的数字电位器，可以拟补模拟电位器进度不够的缺陷，从而提高系统的精度(AD8402 based on the digital potentiometer, can fill to simulate the defects, schedule enough potential to improve precision of the system)

此程序为毕业设计之防火防盗报警器具有MQ2烟雾报警，DS18B20温度报警，红外传感器感应人体红外，超声波感应人得进入，加上1602液晶显示等功能，同时具有蜂鸣器及LED报警(This procedure for the graduation of the fire alarm system design has MQ2 smoke alarm, DS18B20 temperature alarm, human infrared sensor infrared sensor, ultrasonic sensor people allowed to enter, plus 1602 LCD function, but also has a buzzer and LED alarm)

通过RS485端口不停地发送数据0xaa用示波器观察RS485端口A、B信号线上的波形或者用RS485接收器接收发送的字符。(Through the RS485 port to send data continuously 0xaa observed with an oscilloscope RS485 ports A, B signal waveforms or use the RS485 line receiver sends characters.)

51单片机数码管静态显示，计数器功能，学习如何对数据管进行操作(51 MCU digital static display, the counter function, learning how to operate the data management)

用keilC 开发的基于nRF24LE1的wifi收发程序，已经用于实际数据传输系统(keil C wifi nRF24LE1)

配电网零序电流故障定位方法在PSCAD中的模型搭建，可以调整故障类型和短路电阻等进行故障模拟(The fault location method of zero sequence current in distribution network is built in PSCAD, which can adjust the fault type and short circuit resistance. )

利用ULN2003A进行驱动，产生PWM波，里边有照片，可供参考，通过本例程了解PWM 的基本原理和使用 (#include <reg52.h> unsigned char timer1 sbit PWM=P1^2 void system_Ini() { TMOD|= 0x11 //PWM TH1 = 0xfe //11.0592 TL1 = 0x33 TR1 = 1 IE =0x8A } main() { system_Ini() while(1) { if(timer1>100) timer1=0 if(timer1<30) PWM=0 else PWM=1 } )

这是一份控制方法的C语言实现文档，写的非常好，分享给大家，特别是PID算法，说的还蛮好的(This is a method of controlling the C language document, written in a very good, for everyone to share, particularly in the PID algorithm, that s quite good)

说明：  51单片机控制GSM模块发短信和打电话的C源码(GSM single-chip control module 51 send text messages and phone calls the C source)