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Chipamp IC amp kits & PC boards from ChipAmp

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Old 20th October 2012, 06:16 PM   #11
Mooly is offline Mooly  United Kingdom
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noob: blue LED polarity
Originally Posted by Burnincoils View Post
the board is not in a condition to be powered up still

no the boards still not wired to ac.

i just saw briefly a blue flash reflected off the worktable

the iron is 2 wire so maybe its not earth? strangest thing... anyhow yeah i will check if it is cosmetic then i dont need this.

maybe the tip is somehow carrying voltage? (no idea about this making sense or no)
Leakage from an iron can happen but it would need the PCB to have a return path somewhere. Might be worth measuring the AC voltage on the working iron to a known mains ground point. If you do read any voltage then I have a hazy recollection that the leakage current should be under 5 micro amps for a good iron.
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