This add-on board enables a Raspberry Pi B+, A+, or Pi 2 to drive a pair of brushed DC motors. Its dual MC33926 motor drivers operate from 5 V to 28 V and can deliver a continuous 3 A (5 A peak) per motor. The default pin mappings make it easy to get started using our provided software, but the board also exposes most of the driver chips I/O pins for more specialized applications.
This motor driver board is an add-on for the Raspberry Pi Model B+, A+, or Pi 2 that lets it easily control a pair of bidirectional, brushed DC motors. The expansion board uses a pair of Freescale MC33926 motor drivers, which operate from 5 to 28 V and can deliver a continuous 3 A per channel (up to 5 A per channel for a few seconds). Other features include a reverse battery protection circuit and logic gates that reduce the number of I/O pins required to control the driver ICs effectively.
Features:
Wide operating voltage range: 5 V to 28 V
Output current: 3 A continuous (5 A peak) per motor
PWM operation up to 20 kHz, which is ultrasonic and allows for quieter motor operation
Motor indicator LEDs show what the outputs are doing even when no motor is connected
Board can optionally power the Raspberry Pi base directly through added regulator (not included)
Python library makes it easy to get started using this board as a motor driver expansion board
GPIO pin mappings can be customized if the default mappings are not convenient
Remaining motor driver pins are exposed for advanced use
Reverse-voltage protection on motor supply
Robust drivers:
Transient operation (< 500 ms) up to 40 V
Internal peak-current limiting gracefully reduces the output power if the current or temperature get too high
Under-voltage shutdown
Output short-to-ground and short-to-Vcc protection
Prototyping space for easier/cleaner construction of custom circuits
