| Symptom | Likely Cause | Solution | |-----------------------------|----------------------------------|-------------------------------------------| | Motors not moving | No external battery | Connect VM to 6V–12V | | Motors move only one way | One H-bridge dead | Check pins IN1/IN2 or replace shield | | Servo twitches but no motion| Brownout from motor start | Separate 5V supply for servo | | Arduino resets when motors start | Battery voltage dips below 5V | Use higher voltage (9V) or bigger battery | | Shield gets very hot | Over current or stall | Reduce load, add heatsink fan | | PWM speed control has no effect | EN A/B jumpers missing? | No jumpers – these are direct pins. Check code pin numbers. |
Which deliverable would you like?
Fifth, it would feature a addressing the most common forum questions: hw 130 motor control shield for arduino datasheet better
The HW-130 uses two L293D dual H-bridge chips and one 74HC595 shift register to expand the available control pins. L293D Based Arduino Motor Shield | Symptom | Likely Cause | Solution |
D5 and D10 are unused on most HW-130 boards – they are remnants of other shield designs. Stick to D6 and D9 for PWM. | Which deliverable would you like