USB

pic18f452 TMR1的RTC功能——秒信号发生器(pic18f452 TMR1 the RTC function- second signal generator)

DataScope 串口虚拟示波器 一款非常不错 串口调试软件 具有多个串口通道 同时传送多个数据

这是基于STC89C52编程开发的脉搏检测器，里面包含PCB原理图，程序代码和一篇参考论文。(This is based programming development STC89C52 pulse detector, which contains PCB schematics, program code and a reference papers.)

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.

西南交通大学图形学实验的第二个，响应键盘的系统键和非系统键(Second, the system in response to keyboard keys and key non-system experiments Southwest Jiaotong University Graphics)

说明：  嵌入式之使用STM32F429完成锁相环放大器的设计，包含C语言源码。(PLL Amplifier completed by STM32F429.)

说明：  可以研究基于RSSI的TDOA声音定位算法(Sound source location algorithm of the 15th beacon car of Feisi)

电力线载波模块资料，适用于电力线载波开发，(Power Line Carrier Module)

纯数字电路实现4位密码锁，15秒倒计时功能，简易原器件，课程设计，proteus仿真(Pure digital circuit to achieve 4-bit password lock, 15 seconds countdown function, simple components, Proteus simulation, curriculum design)

STM32外扩4*4矩阵键盘，包含原理图及源码。(STM32 extends 4*4 matrix keyboard, including schematic diagram and source code.)