This shield makes it easy to control two brushed DC motors with your Arduino or Arduino-compatible board. Its dual MC33926 motor drivers operate from 5 to 28 V and can deliver a continuous 3 A per motor. These great drivers also offer current-sense feedback and accept ultrasonic PWM frequencies for quieter operation. The Arduino pin mappings can all be customized if the defaults are not convenient, and the motor driver control lines are broken out along the left side of the shield for general-purpose use without an Arduino.
- Wide operating voltage range: 5 – 28 V
- Output current: 3 A continuous (5 A peak) per motor
- Inputs compatible with both 5 V and 3.3 V systems
- PWM operation up to 20 kHz, which is ultrasonic and allows for quieter motor operation
- Current sense voltage output proportional to motor current (approx. 525 mV/A; only active while H-bridge is driving)
- Motor indicator LEDs show what the outputs are doing even when no motor is connected
- Can be used with an Arduino or Arduino clone (through shield headers) or other microcontroller boards (through 0.1″ header along the left side)
- When used as a shield, the motor power supply can optionally be used to power the Arduino base as well
- Arduino pin mappings can be customized if the default mappings are not convenient
- Arduino library makes it easy to get started using this board as a motor driver shield
- Detailed user’s guide
- Reverse-voltage protection on motor supply
- Robust drivers:
- Transient operation up to 40 V
- Over-current limiting via internal PWM
- Over-temperature shutdown and hysteresis
- Under-voltage shutdown
- Output short-to-ground and short-to-Vcc protection
Included Hardware
Pololu dual MC33926 motor driver shield for Arduino with included hardware.
This motor driver board ships with all of the surface-mount parts populated. However, soldering is required for assembly of the included through-hole parts. The following through-hole parts are included:
- one extended/stackable 1×10 female header (for Arduino shields)
- two extended/stackable 1×8 female headers (for Arduino shields)
- two extended/stackable 1×6 female headers (for Arduino shields)
- three 2-pin, 5 mm terminal blocks (for board power and motor outputs)
- 25-pin 0.1″ straight breakaway male header
A 0.1″ shorting block (for optionally supplying shield power to Arduino) is also included.
You can solder the terminal blocks to the six large through-holes to make your motor and motor power connections, or you can break off a 12×1 section of the 0.1″ header strip and solder it into the smaller through-holes that border these larger holes. You can also solder wires directly to the board.
When not using this board as an Arduino shield, you can solder the 0.1″ headers to the logic connections along the left side of the board to enable use with custom cables or solderless breadboards, or you can solder wires directly to the board for more compact installations. Note that motor and motor power connections should not be made through a breadboard.
The mounting hole is intended for use with #4 screws (not included).
An Arduino is not included.
General specifications
- Motor driver: MC33926
- Motor channels: 2
- Minimum operating voltage: 5 V
- Maximum operating voltage: 28 V
- Continuous output current per channel: 3 A
- Current sense: 0.525 V/A
- Maximum PWM frequency: 20 kHz
- Minimum logic voltage: 2.5 V
- Maximum logic voltage: 5.5 V
- Reverse voltage protection?: Y
