nRF24LE1_cn

说明：  基于51单片机的译码器实验，常见问题： 1. 按下按键无效果 确保连线正确 换根杜邦线试试 将单片机拆下来重新安装下，重启开发板(Decoder Experiment Based on 51 Single Chip Microcomputer, Common Problems: 1. Pressing the key has no effect Make sure the connection is correct Try changing the dobang line Remove the microcontroller and reinstall it. Restart the development board.)

控制四相步进电机。。。。。。。。 可使电机正转和反转(Four-phase stepper motor control)

应用51单片机写的蜂鸣器的祝福歌,里面有详细的代码(51 microcontroller blessing song written by buzzer)

记分式多智力数字抢答器,可以实现抢答，倒计时报警，记分功能(Points Answer multi-intelligence figures, you can achieve the Answer, countdown alarm, scorecards function)

智能小车使用遥控控制的源代码，本代码可以作为进一步研究的参考(Smart car using the remote control of the source code, the code can be used as reference for further research)

说明：  msp430单片机的电压表程序。用430的ad转换在用数码管显示电压值(msp430 microcontroller voltmeter program. The ad with the 430 conversion voltage value with a digital LED display)

说明：  51单片机控制的超声波测距程序，内含一个步进电机驱动，可以驱动步进电机改变方向，画好了pcb板(The ultrasonic ranging program controlled by single chip microcomputer contains a stepping motor driver, which can drive the stepping motor to change direction and draw the PCB board)

单片机DS18B20测温功能模块　DS18B20数字温度传感器接线方便，封装成后可应用于多种场合，如管道式，螺纹式，磁铁吸附式，不锈钢封装式，型号多种多样，有LTM8877，LTM8874等等。主要根据应用场合的不同而改变其外观。封装后的DS18B20可用于电缆沟测温，高炉水循环测温，锅炉测温，机房测温，农业大棚测温，洁净室测温，弹药库测温等各种非极限温度场合。耐磨耐碰，体积小，使用方便，封装形式多样，适用于各种狭小空间设备数字测温和控制领域。.(DS18B20 digital temperature sensor MCU DS18B20 temperature measurement function module wiring convenience, packaged as can be applied to a variety of occasions, such as pipes, threaded, magnets, stainless steel package, a variety of models, LTM8877, LTM8874 and so on. Main changes its appearance depending on the applications. Package after the DS18B20 temperature measurement, can be used in the cable trench blast furnace water cycle temperature measurement, boiler temperature measurement, room temperature measurement, the agriculture greenhouse temperature measurement, temperature measurement of a clean room, the temperature measurement of the ammunition depot various temperature extremes occasions. Resistant to wear and touch, small size, easy to use package forms, suitable for a variety of the narrow space equipment digital temperature measurement and control field. .)

A basic string with different escapable characters for testing.

SIM900A的EAT开发，文档中的源码实现功能比较多。Adc，audio play,csd,customerATCommand,DTMF,fcm,flash,gpio,gpio interrupt,http,i2c,keypad,pwm,serialPortStatus,SIM_MUX,sms,socket,spi,spienhance,system,TCP,timer,update,urc(SIM900A EAT development, in the document source more functionality.Adc, audio play, CSD, customerATCommand, DTMF, FCM, flash, gpio, gpio interrupt, HTTP, i2c, keypad, PWM, serialPortStatus, SIM_MUX, SMS, socket, spi, spienhance, system, TCP, timer, update, the urc)