This datasheet and guide will cover the specifications, pinouts, and practical usage of the HW-130. 1. Technical Specifications
74HC595 (Used to expand pins for motor control) Input Voltage (Motor Power): 4.5V to 25V DC hw 130 motor control shield for arduino datasheet
This happens when motors draw too much current from the Arduino's 5V rail. Always use external power for the shield. This datasheet and guide will cover the specifications,