此文件是用于智能小车的自动调速，通过PWM波形来改变脉冲占空比，从而该变电机两边的电压，又P=UI的，电机的功率改变，从而达到电机的调速。-This file is automatically used for the smart s speed through the PWM duty cycle waveform to change the pulse so that the variable voltage motor on both sides, and P = UI of, elec

基于atmeaga16的数字电压表，avr单片机-Based on atmeaga16 the digital voltmeter, avr microcontroller