So, I’ve been busy stockpiling a massive collection of stepper motors. These have mostly been dug out of old dot matrix printers and laboratory equipment (dumpster diving, LOL). I’ve been able to test the small and medium motors with just a ULN2003A chip but the bigger ones need heavier duty circuitry. My collection is nearly complete. What will I do with these motors? ….. some kind of 3d printer :).