I remixed this model from https://www.thingiverse.com/thing:5255244 .
I made it credit card size while adding polarized capacitor, MOSFET and controlled source symbols. Also made a 0.4mm version for using fineliners. I'll later add options for 0.5 and 0.75 ballpoint pens (probably, hopefully).

Round Croners Card size Circuit Symbols 0.4 mm fineliner.stl

Card size Circuit Symbols 0.4 mm fineliner.stl

I remixed this model from https://www.thingiverse.com/thing:5255244 .
I made it credit card size while adding polarized capacitor, MOSFET and controlled source symbols. Also made a 0.4mm version for using fineliners. I'll later add options for 0.5 and 0.75 ballpoint pens (probably, hopefully)

Card Size Circuit Symbols.stl

Round Corners Card Size Circuit Symbols.stl

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Round Croners Card size Circuit Symbols 0.4 mm fineliner.stl

Card size Circuit Symbols 0.4 mm fineliner.stl

Card Size Circuit Symbols.stl

Round Corners Card Size Circuit Symbols.stl