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  1. I've spent a lot of today experimenting with PCB etching as it's not something I've done before. To be honest the day has been pretty much a waste of time. I've CNC milled PCBs in the past without a problem but etching has been winding me up. I'm using pre-sensitised UV resist board and I've had some success. It turns out that sticking the board on top of my van under some fluorescents works better than UV exposure though. However, it's the etching that killing me. I tried a Ferric Chloride and sponge technique and it hardly etched at all. I tried some Sodium Persulfate that came with
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