Manual

The motors are powered by external power supply
The motors are powered by Arduino power supply
Control Mode Selection Jumpers
Motor Terminal: Two DC motors are connected to blue motor terminals. The male header behide the terminals are the same as the
motor terminals.
Motor terminal
PWRIN
：
The motors can be powered by external power supply when the motor current exceeds the limits provided from the
Arduino. The swith between external and Arduino power is implemented by two jumpers.
PWRIN: External Power
VIN: Arduino Power
NOTE: When the motor shield is powered by external
power source, make sure the external power source and Arduino have the same GND.
Control Signal Truth Table
：