ADC0809简易数字电压表数码管显示c程序-ADC0809 digital voltage meter.

单片机的c语言教程：定时报警器，交通灯，密码锁，出租车计价器，频率可调的方波信号发生器，简易数字直流电压表。-Microcontroller c language tutorial: Timing alarm, traffic lights, locks, taxi meter, adjustable frequency square-wave generator, a simple digital DC voltmeter.