User Manual

Pololu m3pi robot with mbed and Wixel
modules socketed.
general-purpose buttons on the expansion PCB
• Four screws, spacers, and nuts for mounting the expansion PCB to the 3pi base
1.c. Other Things You Might Need
The m3pi is designed to be easily augmented by several additional components that are not included
with the m3pi:
• 4 AAA batteries. Any AAA cells will work, but we strongly recommend NiMH batteries, which
are rechargeable and can be purchased from Pololu [https://www.pololu.com/product/1002] or at
a local store. If you use rechargeable batteries, you will also need a battery charger. Battery
chargers designed to connect to external series battery packs may be used with the m3pi’s
battery charger port. To install the batteries, you must remove the m3pi expansion PCB
and 3pi LCD; this rather cumbersome process only needs to be performed once if you use
rechargeable batteries.
When you replace the LCD and m3pi expansion PCB after installing the batteries, please
be very careful to plug the headers into the correct slots in the correct orientation. Plugging
these in incorrectly could permanently damage your m3pi robot!
Pololu m3pi User’s Guide © 2001–2017 Pololu Corporation
1. Overview Page 6 of 39