Quantity   Component name
1 × junk bicycle
1 × 1.6mm steel wire (about 10m)
1 × #30 black polyester spun thread (2000m spool)
1 × computer to do image processing
1 × SD card
1 × ATmega328P controller
1 × small DC motor for turning the rim
1 × solenoid for moving the thread carrier
2 × photo interruptor (GP1S56 and ??)
2 × FKI10531 MOSFET 100V 18A
1 × 5V 2.5A power supply
1 × 3.3V regulator
1 × LED Fiber Optics / Emitters
1 × various scraps of wood, plastic, wire for structure (see logs for details)