User Manual

It is important that you use a power source that is capable of delivering the current your
motors will require. For example, alkaline cells are typically poor choices for high-current
applications, and you should almost never use a 9V battery (the rectangular type with both
terminals on the same side) as your motor power supply.
Dual VNH5019 motor driver shield with an Arduino (Arduino powered by the shield).
It is also possible to power your Arduino directly from the motor shield, as shown in the diagram above,
which eliminates the need for a separate Arduino power supply. When the ARDVIN=VOUT shorting
block is in place, the shield’s reverse-protected input power, VOUT, is connected to the Arduino’s
VIN pin. (When power is connected properly, VOUT is essentially the same as the shield’s VIN.) The
Arduino’s power jack must remain disconnected at all times in this configuration.
Pololu Dual VNH5019 Motor Driver Shield User’s Guide © 2001–2017 Pololu Corporation
3. Getting Started with an Arduino Page 13 of 35