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介绍如何简单可靠而方便测量 4～20mA 信号的文章。许多仪器仪表在远距离传送信号时，都有可能采取 4～20mA 的方式进行传送。本文对使用运算放大器或者不用运算放大器的场合都有介绍。给出了接口电阻的计算方法以及调整4mA＝零点，20mA＝满度的详细说明。并附有局部连接的原理图。(How simple, reliable and convenient measurement of 4 ~ 20mA signal article. Many instruments in the long-distance signal transmission, may take 4 ~ 20mA way transmission. In this paper, an operational amplifier or op amp do not have a description occasions. Shows the calculation of the interface resistance and adjust the 4mA = zero, 20mA = full scale details. Local connections together with the schematic.)

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闻亭TDS2407EA开发板的程序，采用通用定时器产生两路同频的PWM波形，重点调试的两路的相位差，也可以分别调整周期和占空比(Wintech TDS2407EA development board' s procedures, the use of two general purpose timers have the same frequency of the PWM waveform, the focus of debugging phase two, you can adjust the cycle and duty cycle, respectively,)

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说明：  基于KEIL平台开发的红外循迹，超声波避障智能小车程序(Infrared Track and Ultrasound Barrier Avoidance Intelligent Car Program Based on KEIL Platform)

双两程电压表，用TLC1543做的，精准测电压(Double two-way voltmeter)

单片机模拟UART,实现软件模拟串口，C语言编写(Single-chip analog UART, software simulation serial, C language)

stm8l15x软件模拟I2C,使用模拟I2C读写AT24C512(stm8l15x software simulation I2C, analog I2C write AT24C512)

You can use LSM6DS3 (3D accelerometer and 3D gyroscope) in NRF52832 (PCA10040 Dev Board). you can Check your current angle (degree) through your smartphone BLE monitor (nRF Toolbox for BLE application in playstore)(You can use LSM6DS3 (3D accelerometer and 3D gyroscope) in NRF52832 (PCA10040 Dev Board). you can Check your current angle (degree) through your smartphone BLE monitor (nRF Toolbox for BLE application in playstore) please open readme.txt in zip)

AVR单片机ATmega16L基于状态机的独立按键Proteus仿真( )