DDS

采用NXP出品的高集成度PN532读写芯片， 符合ISO/IEC18092（NFC）标准，兼容ISO14443（Type A、Type B）标准。采用USB接口与电脑进行通讯及供电，不但可以读取符合Mifare标准的Classics（M1、M4、MUL）和DESFire卡，还支持FeliCa卡等符合NFC规范的非接触式IC卡。(IC card and entrance guard card reading and writing)

说明：  buck、boost、cuk、正激、反激等电路的matlab仿真和文字介绍，均运行正常(Matlab simulation and text introduction of buck, boost, Cuk, forward and flyback circuits are all running normally)

键盘控制，keypad_test,Arduino(Keyboard control,keypad_test,Arduino)

此代码是基于51单片机的交通灯设计。这是我所购买的51单片机的开发板例程。(This code is 51 microcontroller-based design of traffic lights. This is what I bought 51 MCU development board routines.)

12864test液晶测试程序，51单片机专用的(12864test)

说明：  ATK-ESP8266 WIFI用户手册_V1.3(Atk-esp8266 WiFi user manual)

STM8S103_的独立看门狗的超时复位(the STM8S103 s watchdog operation)

实现数字时钟功能，包括基本的时钟计数，倒计时，时间显示。(digital clock)

doccument for engineer of electronics

Wireless Engineering and Technology vol.6, num.3, 2015, 37pages ISSN : 21522294