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DRV8421A Dual H-Bridge Stepper Driver

About DRV8421A

Note

There are two types DRV8421A(4 line input) and DRV8421B (2 line input).
We use DRV8421A

Pin out

It will be compatible with Moduler Things (simple stepper board)
see

#define AIN1_PIN 6 // on D4
#define AIN2_PIN 7 // on D5
#define BIN1_PIN 28 // on D2
#define BIN2_PIN 4 // on D9
#define PIN_LIMIT 26 // on D0
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