这是本人去年学习所用的新华龙F020开发板的PCB Layout板.因为只用了两天时间画完,没有做走线优化.希望对大家有所帮助.-This is the last year I used to learn new hualong F020 development board PCB Layout of the board. Because only two days画完, there is no alignment to do optimization. Want to be helpful t

f020单片机，输出占空比可通过按键调整的PWM波形，-f020 single chip, the output duty cycle can be adjusted via buttons PWM waveform