homemade pcb board
Here's an important post for you to make electronics. You know, in the past, when you drag a PCB, you take the painkiller, take a permanent marker and drag it down, and when you put it in the foreign chloride, some parts are erased .Then the stars appear .There is a solution to it.
It is better to download the PDF file below and memorize how to do it .PCB and leave a comment ..
