User Manual

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.
Logic power at the same level as your controlling device should be supplied to the VDD pin. This will
typically be between 2.5 and 5 V, but the VNH5019 motor drivers are guaranteed to treat any logic
input voltage over 2.1 V as high. The only purpose of the VDD pin is to power the pull-up resistors on
the EN/DIAG lines.
Motor Considerations
The motor considerations are the same as those detailed in Section 3.c.
Pololu Dual VNH5019 Motor Driver Shield User’s Guide © 2001–2017 Pololu Corporation
4. Using as a General-Purpose Motor Driver Page 23 of 35