A maker named Elliot Andal has developed a method for hand-drawing and etching custom printed circuit boards (PCBs) at home. Andal experimented with various markers and etching solutions, ultimately finding that a Pentel N850 permanent marker worked best as a photoresist and ferric chloride was the most effective etching agent. The resulting artistic PCB, featuring curves and the ALTco logo, was used to control a 3D-printed fume extractor fan for his soldering workshop. AI
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RANK_REASON This is a hobbyist project focused on a niche craft, not a significant industry development.
