// Motor 2 reverse at 50% speed digitalWrite(in3, LOW); analogWrite(in4, 127);

void loop() // Motor 1 forward at 70% speed analogWrite(in1, 180); digitalWrite(in2, LOW);

Motor 1 ─────────────> M1A, M1B Motor 2 ─────────────> M2A, M2B

// Stop both motors (brake) digitalWrite(in1, LOW); digitalWrite(in2, LOW); digitalWrite(in3, LOW); digitalWrite(in4, LOW); delay(1000);

External 6V battery (+) ───────> VM External 6V battery (-) ───────> GND

delay(2000);