2 posts tagged with "PCB"

Last time, I tried soldering the etched PCB.

However, the circuit was wrong, so I remade the board.

I made a printed circuit board for developing a homemade measuring instrument.

Acetone Transfer​

Print on plain paper with a laser printer, then place the printout on a copper board, wet it with water, and press the paper firmly. Next, apply a small amount of acetone and, from above a clear file, rub the toner onto the copper board with your fingernail to transfer it with acetone. The first time, I used too much acetone and failed. It's just right when it's soaked throughout. I used 100% acetone nail polish remover.

Wash and rub with water to remove the paper.

Etching​

Pour the etching solution into a suitable container and warm the solution to body temperature using a freezer bag filled with hot water for etching. Around 40 to 45℃ seems to be good, but I didn't use a thermometer as it would rust, so I just estimated. Visually confirm that the copper in the unmasked areas has dissolved, then stop etching.

Dissolving the Coated Parts​

Dissolve the parts masked with toner or permanent marker using acetone. This leaves only the copper in the masked areas, creating the circuit.

Making a Small Circuit​

I drilled holes and soldered to make a small circuit. It was easier to solder by applying it as if laying it on top of the copper.