charatt77

Wiegand 26/34转RS485、RS232信号转换模块（原理图+PCB+BOM）,输入韦根信号，转换为串口输出(Wiegand 26/34 to RS485, RS232 signal conversion module (schematic + PCB + BOM), input Wiegand signal, converted to serial output)

实现12864LCD的读写操作Proteus仿真(Read and write operations to achieve 12864LCD Proteus simulation)

此源码为c#编写的pc上位机程序，通过串口实现对3路步进电机的控制，可选择电机使能，正反转，转动角度，细分数等(This source code is written in c# program pc PC through the serial interface on the 3-way stepping motor control, motor option is enabled, rotating, rotation angle, and number of segments)

stm32控制NRF905程序，现场运行验证2年。(stm32 NRF905 control procedures, on-site verification for 2 years running.)

关于电源一个c＋＋程序，里面有详细的英文说明；有需要的看看吧(on a c++ program, which has detailed descriptions in English; Need to see it)

基于stm32，实现4*4按键。文件中.c和.h文件可直接添加到自己的项目中(Based on STM32 development, 4*4 matrix key is realized. The. C and. h keys can be added directly to the kile framework.)

CC2530单片机的flash 的读写，以及无线接收函数，看门狗的使用(CC2530 MCU flash, speaking, reading and writing, and the wireless receiving function, the use of the watch dog)

本系统以直流电流源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电流，设置步进等级可达1mA，并可由数码管显示实际输出电流值和电流设定值。本系统由单片机程控输出数字信号，经过D/A转换器（AD7543）输出模拟量，再经过运算放大器隔离放大，控制输出功率管的基极，随着功率管基极电压的变化而输出不同的电流。单片机系统还兼顾对恒流源进行实时监控，输出电流经过电流/电压转变后，通过A/D转换芯片，实时把模拟量转化为数据量，再经单片机分析处理， 通过数据形式的反馈环节，使电流更加稳定，这样构成稳定的压控电流源。实际测试结果表明，本系统输出电流稳定，不随负载和环境温度变化，并具有很高的精度，输出电流误差范围±5mA，输出电流可在20mA~2000mA范围内任意设定，因而可实际应用于需要高稳定度小功率恒流源的领域。(the system to DC current source to the core, MCU AT89S52 main controller, through the keyboard to set up DC power supply output current, set up to 1mA Stepping grades, digital control can be shown by the actual output current value and current setting. The system consists of programmable microcontroller digital signal output, after the D/A converters (AD7543) analog output. After Operational Amplifiers isolation, amplification and control of the output power base. With the power of the base voltage changes in the output current. SCM system also takes on the constant current source for real-time monitoring, after current output current/voltage changes, the A/D converter chip, real-time conversion from analog to the volume of data and then analyzed by the MCU, through data link in the )

一个用proteus仿真软件温度控制器设计，主要涉及到单片机51芯片，通过硬件设计和软件设计，文档中写的比较清楚。(A design with proteus simulation software temperature controller, mainly related to the microcontroller 51 chip, hardware and software design, documentation, write more clearly.)

the keil software design IIC bus read at24c02 software keil engineering applicable to