基于单片机STC11F04E和LM317做的可调稳压电源，利用单片机模拟输出PWM脉冲后经过两级滤波在经过放大后作为LM317的基准电压改变输出电压，改程序已经做出实物，精度还挺高的。内有程序，原理图-Based on SCM STC11F04E and LM317 do adjustable manostat, using single chip computer analog output after two levels of PWM pulse filtering in amplifie

STC11F04E模拟5路PWM。波特率2400，8，N，1串口发送PWM0=000进行控制第一路PWM=0 。PWM0=255为PWM=100 .其他4路PWM1，2，3，4同理-STC11F04E analog 5-way PWM. Baud 2400,8, N, 1 serial port to send PWM0 = 000 control first road PWM = 0 . PWM0 = 255 for the PWM = 100 . Others 4 PWM1, 2,3,4 e