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DS1990A的C51读写程序(DS1990A read and write procedures for the C51)

模拟电表软件，主要模拟电表数据、遥测数据、参数修改、报文显示、可以模拟2个电表（可以自行修改增加），最终通过RS232转485输出。。。(Analog meter software, the main analog meter data, telemetry data, parameter modification, message displays, you can simulate two meters (which can be modified to increase its own), the final output through the RS232 switch 485. . .)

说明：   超声波测距基于8051的源程序设计(8051 Ultrasonic Ranging based on the source code design)

用于单片机键盘扩展,由于单片机的扩展接口少,而采用这种方法 的,8155用于扩展,(SCM keyboard for expansion, the expansion of microcontroller interface small, and the use of this method. 8155 for the expansion,)

说明：  用于全桥逆变电路的移相软启控制程序，周期和启动时间均可调节。(Phase-shifting soft-start control program for full-bridge inverters has adjustable cycle and start-up time.)

说明：  msp430单片机的比较器功能简易代码，仅供参考，使用端口P1驱动LED，P1.1作为比较端口(MSp430 MCU comparator function simple code, for reference only, using port P1 to drive LED, P1.1 as the comparison port)

AD0809+LCD1602+STC89C52+无源蜂鸣器报警，可显示酒精浓度，并且可以设置浓度值（加、减） 基于MQ-3酒精浓度传感器的酒精浓度测试仪(AD0809+ LCD1602+ STC89C52+ passive buzzer alarm can be displayed alcohol concentration, and can be set concentration value (addition, subtraction) MQ-3 alcohol concentration sensor-based alcohol concentration tester)

Adafruit GFX Library master or avr microcontrollers

说明：  通过STM32的FSMC接口来控制TFTLCD的显示(The display of TFTLCD is controlled by FSMC interface of STM32)

一个完整的基于ST单片机的恒压频比变频控制程序，很有参考价值，附带的文档有详细的软件结构说明(A complete ST-based single-chip constant voltage frequency VF control program with a detailed description.)