Work-in-progress project to use a CD as an optical encoder for experiments. I'm writing some code for an AVR-based project to count up and down, depending on which way one spins the CD. All parts designed in SketchUp. These parts are fine-tuned for my Kossel printer, so they might not fit exactly. To do: Test assemble Make a base Make an LED/Photo transistor holder Make pattern for CD Kudos to HomoFaciens for inspiration https://www.youtube.com/channel/UCDq5T5K8dd9qL6fKBtBMXoQ