ARM7开发板的USB源程序，好东西咯。

一种基于PWM调制的高效率的变换电路的研究。-A high-efficiency PWM modulation circuit of the transform.

This document provides information that supplements the Silicon Labs Interrupt Driver, which includes instructions for installing the driver and information for building the driver.

用C来实现实时时钟。对比与上个汇编语言。-Using C to achieve real-time clock.

日历时钟12887源程序，很简单但很实用，是一个很好的参考例子。-12,887 calendar clock source, which is very simple but very useful, is a good example.

U2270B，对U2270B芯片进行了详细介绍。-U2270B, on U2270B chip described in detail.

用于手持时钟受时，时钟芯片的工作稳定性，以D18B20温度传感器的采集，微调时钟芯片的内置电容，改变震荡频率-For hand-held by the clock, the clock chip of job stability to temperature sensor D18B20 collection, fine-tuning of the built-in clock chip capacitors to change the vibration frequency

一个单片机心电图数据采集带通滤波的算法。-ECG data acquisition of a single-chip band-pass filtering algorithms.

使用DS18B20温度传感器设计的温控系统，在数码管上显示当前温度并且温度高于或低于预设值时发出报警声。-DS18B20 temperature sensor designed for the use of temperature control systems, digital tube displays the current temperature and the temperature is above or below the preset value, an alarm sound.

基于8051的高精度的秒表汇编程序，从0到60秒，有复位，暂停，累计功能。附加protues连接图-Based on the 8051 compilation of high-precision stopwatch program, from 0 to 60 seconds, a reset, pause, the cumulative function. Additional protues connection diagram