mjbots

Summary

About

About mjbots

mjbots has supplied components and assemblies for dynamic torque-controlled robots since 2019. The moteus controller family combines field-oriented control, on-axis magnetic encoders and high-speed CAN-FD communications, supporting position, velocity and torque modes across several power classes.

The Cambridge company also offers qdd-series integrated servos, Raspberry Pi interface boards, power-distribution hardware and robot accessories. Much of the moteus hardware and firmware is published under open-source licences, giving researchers and robot builders a supported commercial implementation while retaining access to the underlying design and control stack.

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DATA: KORTHOS

Supply

Supply chain relationships

  • ams OSRAM

    Inbound - Sensing Perception - ams AS5047P magnetic encoders provide onboard rotor-position feedback in AS5047P-equipped mjbots moteus controllers

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  • Texas Instruments

    Inbound - Actuation Motion - mjbots moteus controllers use Texas Instruments DRV8323 or DRV8353 gate drivers, depending on the board model

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  • STMicroelectronics

    Inbound - Compute & Control - mjbots pi3hat r4.5 uses three STMicroelectronics STM32G474CEU6 microcontrollers

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  • Texas Instruments

    Inbound - electronics and robotics components - mjbots pi3hat r4.5 specifies Texas Instruments TCAN1057AEVDRQ1 CAN transceivers

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  • TDK-InvenSense

    Inbound - Sensing Perception - mjbots pi3hat r4.5 specifies the TDK-InvenSense ICM-42688-P inertial sensor

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  • Analog Devices

    Inbound - Power Energy - mjbots pi3hat r4.5 specifies an Analog Devices MAX17504 step-down power converter

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  • ON Semiconductor

    Inbound - electronics and robotics components - mjbots pi3hat r4.5 specifies onsemi CAT24C32HU4I-GT3 EEPROM

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  • Monolithic Power Systems

    Inbound - Sensing Perception - Monolithic Power Systems MA600 encoders provide onboard position sensing in MA600-equipped mjbots moteus controllers

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  • STMicroelectronics

    Inbound - Compute & Control - mjbots specifies STMicroelectronics STM32G4 MCUs for its actively maintained moteus controllers

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Team

  • Joshua James Pieper - Founder and Principal - Founded mjbots and leads development of the moteus motion-control platform.

Timeline

Events

  • 2026-05-28 - Capability - mjbots releases moteus firmware 1.0.0

    The release preserves CAN-FD register-protocol compatibility with the original public moteus-r4 hardware from 2019. The compatible protocol spans multiple later board variants, allowing older controllers to remain monitorable and commandable with current tooling. Version 1.0 formalizes a controller software line that had previously used date-based releases.

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Context

Comparable profiles

Context tags

  • Motion control drive supplier - Peer Group - mjbots supplies moteus brushless servo controllers for robots. Source: https://mjbots.com/
  • Servo motion control components - Stack Layer - Its catalogue covers controllers, integrated servos and CAN-FD accessories. Source: https://mjbots.com/