Here’s a PCB fabrication ... sided copper clad stock. Once the millings have been cleaned off the holes are coated with a mixture of waterproof ink and carbon. This prepares them for plating ...
This particular innovation, where a PCB is packed with stepped circular or rectangular copper coins, is headed to markets where even the best air coolers are impractical – like miniature devices ...
Small glass jars to act as the plating tanks and the machine uses an Arduino controller along with a PCB to hold things like ... you can see copper plating of a nail at around the 12 minute ...
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