Quantity   Component name
8 × Diodes 4 Flyback diodes to protect from inductive kickback.
1 × Arduino Arduino running Guy Carpenter's gaugette software
1 × Pointer The all important pointer for the gauge itself. Mine is 3D printed.
1 × Gauge face A face for your gauge! I created mine in word for windows, but any word processing or art program will do the trick here.
1 × Switec X27.168 Stepper motor / Analog gauge stepper breakout This is a tiny stepper motor used in in many automotive gauge applications. The motor draws so little current that it can be driven directly from the pins of most 5V capable PIC or AVR microcontrollers.
1 × A PC The host which will have it's CPU utilization measured.