Mar 282011
 

The instructable that I learned this from was pretty useful, but it left out a few things that I wanted to elaborate on.

Supplies:

  • A blank PCB (“copper clad”) to etch your circuit from (here’s what I got but any copper clad will work. Note: avoid the 0.127″, it’s too thick to put some leads all the way through)
  • Sharpie (for etch resist)
  • Muriatic acid – 20 Baume 31.45% (the 14.5% junk doesn’t work). Also take care not to murder yourself with this stuff.
  • Hydrogen peroxide – 3%
  • A glass container with a lid. Make sure that the lid is not airtight. If it is airtight, it can explode… acid everywhere… bad news.
  • Nerd goggles (safety first)
  • Particle respirator mask
  • Automotive rubbing compound (from the auto parts store)

Read more…

 Posted by at 10:39 PM

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