User Manual

2×7 and two 1×2 0.1″ extended male headers used to connect the
m3pi expansion PCB to the 3pi robot base.
The short ends of these headers should be soldered to the m3pi expansion PCB in the locations
shown in the pictures below; the long ends will plug into female headers on the 3pi robot base.
m3pi locations for the headers that
connect the expansion PCB to the 3pi
robot base (as seen from the top).
Pololu m3pi expansion kit after
assembly: these pins connect the
expansion PCB to the 3pi robot.
This requires the headers to be inserted through the appropriate through-holes from the underside of
the PCB and then soldered on the top side of the PCB.
It is very important that the headers be soldered in straight or else they won’t line up
properly with the headers on the 3pi robot base. We recommend you initially solder just
one header pin and then check to see if the header is straight. If it is, proceed with
soldering the rest of the pins. If it isn’t, melt the solder joint with your soldering iron and
adjust the header (Note: the soldered header pin will get very hot when you do this, so
do not touch this pin while making the adjustments!). It is very difficult to straighten a
crooked header that is soldered in multiple places.
Pololu m3pi User’s Guide © 2001–2017 Pololu Corporation
2. Assembly Page 16 of 39