Sometimes you have a finished circuit and you want to know how it works. If you can get the schematic of the circuit, it’s much easier to see how it works.

This is especially useful when repairing electronics as it easier to find faults when you know how it’s supposed to work. But also useful if you see an interesting circuit that you want to copy and maybe modify a bit for your specific use.

But how do you go from finished circuit to schematic? This process is called reverse engineering, and in this short video lesson, I’ll show you an example of how I do this.

The finished circuit that I’ll convert is this one from Youtube: