Circuit board etching: acid vs. vinegar

Last week we etched circuit boards in Circuit Design class. We had the choice of etching with acid or vinegar. My partner, Danara, chose acid while I tried with vinegar. Here’s what happened.¬†The star design is Danara’s.

Printed our designs onto blue paper to be transferred onto the copper.

Printed our designs onto blue paper to be transferred onto the copper.

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Soaking in water.

 

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Danara’s board in acid. Mine in vinegar, with a dash of salt.

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Danara’s board looked great, especially after it was tinted. Mine didn’t come out so well. womp womp

Vinegar took a lot longer. Because we had a couple of boards using the same container of vinegar, the residue from one board would float onto another board. Danara had her own container of acid, which did a super clean job. I may try again with vinegar, one day. For now, I’ll do over¬†with acid.

 

Seeing the beauty of tiny

For Circuit Design and Prototype, everything we make will be tiny. These components and designs are what we usually don’t see when things are working well. We only get a glimpse of them when we get a device repaired. Our first assignment was to appreciate the beauty of these tiny parts that makes much of the world around us function.

I have a few Shanzhai iPhones laying around from my research in Shenzhen. Below are photos and videos of the parts seen under the microscope.

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