Cuttable traces on the dual MC33926 motor
driver shield for changing default Arduino
connections.
The yellow boxes mark the locations where traces can be cut on the underside of the PCB to remap
the default Arduino pin assignments. The top through-hole of each vertical pair connects to the Arduino
pin and the bottom through-hole connects to the motor driver pin. For the A0 and A1 pairs, which are
oriented horizontally, the right pins connect to the Arduino and the left pins connect to the motor drivers
(when the shield is viewed from the top side). In the figure above, the pin number label is next to the
pin that connects directly to the Arduino.
To change one of the default mappings, simply use a knife to cut the trace between the appropriate
pair of holes on the underside of the PCB (there is no connection to cut on the topside of the PCB)
and run a wire from a different Arduino pin to the bottom (or left) hole of the pair to create a new
connection. You can later use
shorting blocks
[https://www.pololu.com/product/968]
to restore the default
pin mapping if you populate the severed hole pairs with 2×1 pieces of the included 0.1″ male header
strip.
The pins highlighted in blue in the above diagram are the Arduino header pins and their secondary
breakout rows. These pins are also connected by a single trace on the underside of the PCB, and
these traces can also be cut if you wish to sever the connection between the breakout point and the
header pin.
Pololu Dual MC33926 Motor Driver Shield User’s Guide
© 2001–2017 Pololu Corporation
6. Customizing the Shield
Page 28 of 30
