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I love etching my own PCBs. It’s a great way to incorporate some of art-school skills with my love for DIY electronics. Up until now, I’d always used traditional ferric chloride to etch my boards, though I’d heard many sing the praises of an alternative etchant easily made from common ingredients. Tired of mail-ordering ferric and dealing with proper disposal, I decided to give cupric chloride a try.
Following Open Circuits’ recipe, I picked up some muriatic acid from the local hardware store and a bottle of hydrogen peroxide 3% from the pharmacy. After setting up next to my big window fan, I
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