Design, Build, Test, Iterate

Archive for July, 2011

DIY PCB Etching: Colors of Compounds and Helpful Links

UPDATE 11/10/11: Although most of these colors are accurate when dealing with concentrated solutions of salt, some are not (e.g., descriptions of copper (I) and (II) chlorides are mixed up). Take it with a pinch of… salt. Yellow? Copper hydroxide is supposed to be green! If you have already been at this for hours and […]

DIY PCB Etching: Electrolyzing Salt to Produce Cuprous Chloride

tl;dr: You cannot produce an effective cupric chloride etchant using only salt, copper, and electricity. Yet I spent a week trying to do just that. Essentially, I wanted an effective etchant-producing method that didn’t require buying anything out of the ordinary. I mean, all the right elements were there (i.e., chlorine and copper). Unfortunately, other […]