Create a smartphone-controlled robot using an HC-05 Bluetooth module and the HW-130.
The is a capable, inexpensive workhorse—but only if you know its real limits. The original datasheet fails to warn about dead zones, thermal throttling, and proper power sequencing. By following this guide, you can:
The datasheet never mentions this, but the shield works fine for light stepper loads (NEMA 17 size max). hw 130 motor control shield for arduino datasheet better
// HW-130 Motor Shield Pin Definitions #define ENA 9 // Speed Motor A #define IN1 4 // Direction Motor A #define IN2 5 // Direction Motor A
// --- Move Reverse (Full Speed) --- digitalWrite(IN1, LOW); digitalWrite(IN2, HIGH); analogWrite(ENA, 255); By following this guide, you can: The datasheet
Do not ignore the . The HW-130 includes 1N4007 diodes on board, but those are too slow for PWM. Better upgrade: solder 1N5819 Schottky diodes across OUT1-2 and OUT3-4 (cathode to positive supply, anode to output).
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If you hold the HW-130, you are likely holding a blue PCB stacked with chips. To understand it, we must ignore the "HW-130" label and look at the actual components:
The outputs are labeled M1, M2, M3, M4.
The shield is easy to use, but users consistently report that it draws its logic power directly from the Arduino's 5V pin. This can cause instability if you try to power two servos and heavy motors from the same battery. The most stable setups involve separate power sources for the Arduino's logic and the motors.