Thingiverse
ToM Transistor based Extruder “Relay Fixâ€
by merlinjim
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I took the schematic from the parent object and made some PCB layouts out of it. I applied a fix to add resisters to every transistor, otherwise parts are the same (4x TIP transistors, 4x resistors, 4x 1N400x diodes, 3x 2-pin connectors)
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