#define IN1_PIN 8 // ULN2003 IN1 → Arduino pin 8 #define IN2_PIN 9 // ULN2003 IN2 → Arduino pin 9 #define IN3_PIN 10 // ULN2003 IN3 → Arduino pin 10 #define IN4_PIN 11 // ULN2003 IN4 → Arduino pin 11 ...
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