[i=s]This post was last edited by Fengxiaren on 2021-1-16 22:05[/i]The specific circuit diagram is this, Add a chip pin diagramNowRemove D2 and D3 at the back end, do not solder the inductor, and sold
The circuit principle is as follows: 6N137 isolates a PWM signal, the frequency is 2-10K, and now there is a very annoying "step", about 2 microseconds, the voltage is around 5V. I don't know why this
[align=left][color=rgb(25, 25, 25)][font="]Crystal oscillators are made by grinding crystal into chips. Among them, the selection of chip raw materials is particularly important, which directly affect
Today I finally took some time to post a message. Because I have a lot of things to do, mainly preparing for the postgraduate entrance examination, it is really impossible to live in this society with