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基于51单片机的简易计算器，能够实现简单的的加减乘除操作(A simple calculator based on 51 single chip computer can realize simple operation of addition, subtraction, multiplication and division.)

对讲机单芯片IC ：RDA1846S 详细开发资料(RDA1846S datasheet and register table)

说明：  仿照唱吧的UI项目，仅仅是实现了布局方面的一些东西，没有实现实际的功能。(Modeled on the UI project, just to achieve some aspects of the layout, did not achieve the actual function. )

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)

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)

MSP430F147 FLASH功能例程

红外遥控解码，基于51单片机的例程，简单实用，我在学习单片机的时候用到的(Infrared remote control decoding, based on 51 MCU routine, simple and practical, I used the time to learn microcontroller)

说明：  51单片机红外解码（1）采用脉宽调制串行码，以脉宽为0.565ms，间隔0.56ms，周期为1.125ms的组合表示二进制的“0” （2）一脉宽为0.565ms，间隔1.685ms，周期为2.25ms的组合表示二进制的“1”(51 MCU infrared decoder (1) uses pulse width modulation serial code. The combination of pulse width 0.565 ms, interval 0.56 MS and period 1.125 MS represents the binary "0" (2) pulse width 0.565 ms, interval 1.685 MS and period 2.25 MS represents the binary "1".)

AT89S51单片机与ADC0809模数转换器的三种典型连接(Three typical microcontroller AT89S51 with ADC0809 ADC connection)

J1939 protocol description