How does a stepper motor turn into an encoder ... but the final was on a prototyping board. Of course, an Arduino reads the pulses. We love using things for unintended purposes.

That’s the idea behind [BetaChecker’s] two-axis stepper motor, which looks like it has ... a large number of L293 H-bridge chips and an Arduino Mega. A variety of sleds, each with neodymium ...