Motoron M3H550 Triple Motor Controller for Raspberry Pi (No Connectors or Standoffs)

£22.24 £18.53
The Motoron M3H550 Triple Motor Controller makes it easy to control DC motors from a Raspberry Pi (Model B+ or newer) through an I²C interface. Each module can independently control up to three motors, and multiple Motoron boards can be stacked on top of the same Raspberry Pi for projects that need to control even more motors. The M3H550 supports motor supply voltages from 1.8 V to 22 V and can deliver continuous output currents up to 1.7 A per motor. This version is just the motor controller by itself, without any connectors or mounting hardware included.


The Motoron M3H550 add-on board makes it easy to control up to three bidirectional, brushed DC motors with a compatible Raspberry Pi (Model B+ or newer). It supports motor supply voltages from 1.8 V to 22 V and can deliver continuous output currents up to 1.7 A per motor. The M3H550 is designed to stack on top of a Raspberry Pi (Model B+ or newer), similar to a HAT (Hardware Attached on Top), and multiple Motoron controllers can be stacked on top of each other, allowing independent control of many motors. Unlike most of our motor drivers and motor driver expansion boards for Raspberry Pi, the Motoron does not require any PWM outputs on your Raspberry Pi. Instead, the Raspberry Pi communicates with the Motoron using I²C, so only two GPIO pins are needed regardless of how many Motorons you connect.

Three M3H550 versions are available to provide different options for the through-hole connectors:

  • Motoron M3H550 with soldered stackable headers and terminal blocks
  • Motoron M3H550 with headers and terminal blocks included but not soldered in
  • Motoron M3H550 without any headers, terminal blocks, or mounting hardware included

For applications using an Arduino or compatible controller, consider the Motoron M3S550 instead (also available with different connector options).

Details for item 5073

This Motoron M3H550 version is just the assembled PCB module as shown above, with no connectors or mounting hardware included. This version is intended for those who want to solder wires directly to the board or use different connectors from those included with other versions. We have a variety of connectors available separately.

Features and specifications

  • Three motor control channels allow for independent control of up to three bidirectional brushed DC motors per Motoron
  • Wide motor supply voltage range: 1.8 V to 22 V (absolute maximum)
  • Maximum output current per motor: 1.7 A continuous, 5 A peak for <1 second
  • Reverse-voltage protection on motor power supply (down to −20 V)
  • Logic voltage range: 3.0 V to 4.9 V (5V nominal not recommended)
  • Control interface: I²C
  • I²C clock speed: up to 400 kHz
  • Optional cyclic redundancy checking (CRC)
  • Configurable motion parameters:
    • Max acceleration/deceleration forward/reverse
    • Starting speed forward/reverse
    • Direction change delay forward/reverse
  • PWM frequency: eight options available from 1 kHz to 80 kHz
  • Command timeout feature stops motors if the Raspberry Pi stops communicating
  • Configurable automatic error response
  • Motor power supply (VIN) voltage measurement
  • Optional pins make it easy to power the Raspberry Pi from reverse-protected motor power through an external regulator (not included)
  • Two status LEDs
  • Motor direction indicator LEDs
  • Motoron Python library simplifies using the Motoron with Python or MicroPython
  • Comprehensive user’s guide


  Size  32.5 mm x 56 mm
  Weight  8 g

General Specifications

  Channels  3
  Model  Motoron M3H550
  Control Interface  I²C
  Minimum operating voltage  1.8 V
  Maximum operating voltage  22 V
  Continuous output current per channel  1.7 A
  Peak output current per channel  5 A
  Minimum logic voltage  3.0 V
  Maximum logic voltage  4.9 V (1)
  Reverse voltage protection?  Y (2)
  Connectors soldered?  N


(1) 5V nominal logic voltage NOT recommended

(2) Reverse voltage protection only works up to 20 V.