RINGCOUNTER

用51单片机读取AD芯片7135，并显示在1602上，7135是一个高精度低速的AD芯片(With 51 MCU read AD chip 7135, and displayed in 1602, 7135 is a high-precision low-speed AD chip)

电源（电子变压器）美规的电子变压器，用在120V电压(Power supply (electronic transformers) U.S. regulatory electronic transformer with a 120V voltage)

单片机AD功能实例，使用1602显示电压(SCM AD function example, the use of 1602 shows the voltage)

crc32 calculation code

说明：  适用于stm32平台，已经过实际测试，测试模块为GY-906(It is applicable to STM32 platform and has been tested in practice)

RC522 SPI接口的51单片机程序例程(RC522 SPI)

The LED clock consists of 60 LEDs which are placed circular around a common analog clock. The LEDs are used to display the seconds. Essential part of this circuit is the LED driver MAX7219 from Maxim. A datasheet is available on Maxim s homepage. The clock is controlled by the microcontroller AT89C2051 from Atmel. This microcontroller is clocked at a frequency of 12 MHz from which results a time base of 1 microsecond. Via software dividers one clock impulse per second is generated which is used for updating the LED display.

可以用的飞思卡尔智能车测试程序，非常不错的(Freescale smart car test procedures can be used, very good)

在单片机上实现ds18b20温度检测并通过1602液晶显示，可通过温度自动调节或手动调节直流电机转速(Achieve ds18b20 temperature detection on the microcontroller and by 1602 LCD can be adjusted manually or automatically adjust the speed of a DC motor through temperature)

集成CAN总线的单片机连接图，包括ad转换，电源处理，通过232与主机的通讯(-An SCM connection graph of integrated CAN bus, including ad conversion , power treatment and the communication with main machine by 232.)