使用51单片机，模拟PWM，可实现电机转动停止·调速·正反转，并用1602显示状态。-Using 51 single-chip microcomputer, the simulation of PWM, can realize the motor rotation stop- speed and positive and reverse, and use 1602 display state.

灯板串联PCB图纸.用51单片机进行PWM调光控制-Lamp plate series PCB drawing，With 51 MCU PWM dimming control