Dual MC33926 motor driver shield power buses when connected to an
Arduino.
In the shield’s default state, the motor driver shield and Arduino are powered separately. When used
this way, the Arduino must be powered via USB, its power jack, or its VIN pin, and the shield must be
supplied with 5 to 28 V through the large
VIN
and
GND
pads on the right side of the board. Attempting
to power the shield through other means, such as from the Arduino or through the small VOUT pin, can
permanently damage both the Arduino and the shield (only the large power traces on the right side of
the shield are designed to handle the high currents involved in powering motors). A high-side reverse-
voltage protection MOSFET prevents the shield from being damaged if motor power is inadvertently
connected backwards. Logic power, VDD, is automatically supplied by the Arduino.
Pololu Dual MC33926 Motor Driver Shield User’s Guide
© 2001–2017 Pololu Corporation
3. Getting Started with an Arduino
Page 12 of 30
