Pololu 5" Robot Chassis RRC04A Solid White IO Expansion Shields/HATs The driver's printed circuit board

The driver's printed circuit board is designed to draw heat out of the MOSFETs

although you can easily swap these in software

It's connected to the board through the SPI interface

This is close to the 25 maximum gain available using the LM1458

On the bottom side of the Touch Sensor there is a small exposed metallic pad

Pololu 5" Robot Chassis RRC04A Solid White IO Expansion Shields/HATs The driver's printed circuit boardThis chassis base plate is a round piece of 1 8" (3 mm) acrylic with a 5" (127 mm) diameter and cutouts for building a differential drive robot chassis based on our micro metal gearmotors and 4219mm wheels . The chassis has assorted general purpose holes and slots that support many configurations of sensors and other robot components. Pololu 5" round robot chassis RRC04A with an Orangutan SV 328 and a QTR sensor array. Overview The 5" robot chassis