I'm working on making a swappable pen-plotter head for my laser cutter. For the past few hours I've been working on the electronics and I've got something that should work but currently doesn't.

I'm too sleepy and sore to get the o-scope back on the floor to diagnose the problem, but I suspect it's either the diode or the resistor I used. Will have a look tomorrow.

#hobby #electronics #projects #tech #penplotting #maker