: An onboard jumper connects or disconnects the Arduino's power from the motor power. Users must remove this jumper
| Problem | Likely Cause | Fix (From HW 130 Schematic) | | :--- | :--- | :--- | | Motors twitch, don't spin | Insufficient motor power supply | VS terminal must provide >5V. For 3.7V toy motors, bypass VS and use Arduino 5V (not recommended). | | Arduino resets when motor starts | Inrush current | Add 470uF–1000uF capacitor across VS and GND on the terminal block. | | Servos jitter | 5V jumper closed, drawing too much current | Open 5V jumper and power servos from external 5V BEC. | | Motor runs only one direction | Broken internal L293D H-bridge | Replace shield. This IC has no short-circuit protection. | hw 130 motor control shield for arduino datasheet free
Electrical characteristics (typical, varying by exact HW-130 model) : An onboard jumper connects or disconnects the
2 dedicated 3-pin headers connected to Arduino’s high-resolution timers (Pins 9 and 10). | | Arduino resets when motor starts |
Uses two L293D quadruple H-bridge drivers and one 74HC595 shift register for serial-to-parallel pin expansion.