Filament Sensor

Having failed a few times at catching my printer before it runs out of filament, I finally decided to do something about it. I found the "Filament Sensor"-plugin for octoprint, and decided to use a microswitch to do the detection for me.

This is the result; It is attached right before my extruder, so I can use almost every last scrap of filament I have laying around.

Edit: Previous problems with rpi not booting was due to me brainfarting and connecting 3v3 and gnd with the 1k resistor between them. Somehow it still worked, but rpi did not boot. After wiring as described, it works as intended