RoboClaw 2x60A Motor Controller (V7) SF_Cutters Switching 5 V regulator enables

Switching 5 V regulator enables efficient operation

It's designed to fit nicely onto the Pi Model A or B rev 2 but also works perfectly fine with the Model B+ as long as you don't mind the PCB overhangs the USB ports by 5mm (see the photos above)

Since this is a ProtoSnap

All module pins broken out

but at a largely reduced size of only 65mm long by 30mm wide and at a very economical price

RoboClaw 2x60A Motor Controller (V7) SF_Cutters Switching 5 V regulator enablesThe RoboClaw motor controllers from Basicmicro (formerly Ion Motion Control) can control a pair of brushed DC motors using USB serial, TTL serial, RC, or analog inputs. Integrated dual quadrature decoders make it easy to create a closed loop speed control system. This version can supply a continuous 60 A per channel (120 A peak) and operates up to 34 V. Overview The RoboClaws from Basicmicro (formerly Ion Motion Control) are a family of efficient,