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stepper motor controller chip, Dc 5v 2-phase 4-wire Micro Stepper Motor Driver Mini Stepping Motor Controller Chip Module Board For Mcu Arduino C51 Arm Motor Driver AliExpress, 4CH 4 Channel HG7881 H-bridge DC 2.5-12V Stepper Motor Driver Controller PCB Board 4 Way 2 Phase Geekcreit for Arduino