Quantity   Component name
1 × ATMega32u4 The brains!
1 × 200 oz in Stepper The brawn!
1 × Tempco Band heater The heater
2 × TI Stepper Drivers Used to power both main motor and puller motor
1 × TSL1401CL For diameter feedback - linear optical array
1 × Servo For spreading the filament over a spool
1 × 40 MM fan For cooling the filament
1 × Meanwell RS-75-12 PSU for low voltage DC (everything other than heater)
1 × Solarbotics baby gear motor For spooling
1 × 20X4 LCD screen For the GUI built into ProtoCycler
1 × Puller stepper Used for the puller - any small, low power stepper will do.
1 × Way, way too much custom stuff :) Grinder, whole extrusion section, chassis, misc elec components, etc...there's a lot of custom parts!