- Rpi b/b+
- resistance ~750omh x2 (for diods KTIR0411S)
- resistance ~200omh x2 (for receiver KTIR0411S)
- a4988
- connectors (for power, a4988, wires, etc)
- stepper motor (12v / 10-15W is better)
modify pcb (require horizontal flip the a4988 component)
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