After
finished the etching process, the next part is about soldering the components
on the PCB according the design. Solder needs a clean surface on which to adhere.
Buff the copper foil of a PC board with steel wool before soldering. Remove any
oil, paint, wax, etc. with a solvent, steel wool, or fine sandpaper. To solder,
heat the connection with the tip of the soldering iron for a few seconds, then
apply the solder. Open circuit can be troubleshoot by using jumper wire to make
the connection between two traces. After all tracks are repaired properly.
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