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说明：  Esp8266（基于FreeRtos 1.5.0版本）的 hello world 串口打印工程模板(Hello World Serial Port Printing Engineering Template Based on FreeRtos Version 1.5.0)

AVR 单片机学习总结，以问答方式出现。希望能给朋友们一点帮助(some question answer for avr study.I hope it is helpful for your learning. )

erads最新破解软件2016版,亲测有用(very good)

最近非常流行的STC增强型单片机PDF应用资料(Recently very popular STC-enhanced single-chip application information PDF)

DH4YHL frequency counter (VHF version) with 74hc04 and 74hc132 as prescaler

单片机驱动加速度传感器LIS3DH，获取运动轨迹数据。(Single-chip drive acceleration sensor LIS3DH)

management system requirements are as follows: 1. can be in various ways, such as title, number, the author) of the query library. 2. To be able to easily borrow books, renewal of library books, return to books. 3. To be able to query their basic information and to borrow books. 4. To be able to become familiar with Library Management System.

说明：  内有电路图和对应的程序，已经调试成功，能实现定时功能。(There are circuit diagrams and the corresponding procedures are debugging success, to achieve timing.)

将工程从stm32f1平台移植到stm32l4平台的方法。(Porting projects from the stm32f1 platform to the stm32l4 platform.)

spi接口的ad芯片ads8332驱动代码，主芯片为c8051f3xx系列，更改IO口配置即可使用，包含AD数字滤波部分。(spi interface ad chip ads8332 driver code, the main chip for c8051f3xx series, change IO port configuration can be used, including AD digital filter section.)