I’m relatively sure that I managed to fry a car key transponder (RFID tag) with a wirefeed welder.
A friend of mine was welding with his harborfreight titanium 125 about 3ft from where my car keys sat and the next day I ended up stranded at a kwik trip station. my ford fusion 2007 was rejecting the only key I had at the time.
I set out to build a Resistive Spot welder that could possibly even weld copper. not sure if it will or not as this capacitive discharge welder is back burnnnered at the moment. I wish i had got to test the jig.
this MOSFET switched capacitive discharge resistive spot welder project was intended for my use to allow assembly of quality lithium-ion packs from well-matched cells with reliable cell to cell welds.