Home Hardware interfaces boards Pololu Jrk 12v12 USB Motor Controller with Feedback

Pololu Jrk 12v12 USB Motor Controller with Feedback

Published on 4. April 2012

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    The jrk 12v12 is a versatile, general-purpose motor controller that supports a variety of interfaces, including USB. The 6 V to 16 V operating range and high continuous output current of 12 A (30 A peak) allow this board to control many medium-sized DC brushed motors. Analog voltage and tachometer (frequency) feedback options allow quick implementation of closed-loop servo systems, and a free configuration utility (for Windows 7, Vista, or Windows XP) allows easy calibration and configuration through the USB port.

    Key improvements over competing products and earlier Pololu motor controllers with feedback include:

    • USB connectivity with emulated serial (COM) port allows direct motor control from a PC.
    • Ultrasonic PWM to eliminate switching-induced motor shaft hum or whine.
    • Robust, high-speed communication protocol with user-configurable error condition response.
    • High internal resolution (12 bits) for smooth and flexible calibration to various input and feedback devices.
    • Current sensing and limiting.
    • Reversed power protection.
    • Field-upgradeable firmware.

    Main Features of the Jrk 12v12

    • Simple bidirectional control of one DC brush motor.
    • 6 V to 16 V operating supply range.
    • 12 A maximum continuous current output (30 A peak).
    • Four communication or control options:
      • USB interface for direct connection to a PC.
      • Full-duplex, TTL-level asynchronous serial interface for direct connection to microcontrollers or other embedded controllers.
      • Hobby radio control (RC) pulse width interface for direct connection to an RC receiver or RC servo controller.
      • 0–5 V analog voltage interface for direct connection to potentiometers and analog joysticks.
    • Two closed-loop feedback options:
      • 0–5 V analog voltage.
      • Frequency/tachometer digital input up to 2 MHz with 1 ms PID period.
      • (Open-loop control with no feedback also available.)
    • Simple configuration and calibration over USB with free configuration program (Windows 7, Vista, and Windows XP compatible).
    • Configurable parameters include:
      • PID period and PID constants (feedback tuning parameters).
      • Maximum current.
      • Maximum duty cycle.
      • Maximum acceleration.
      • Error response.
      • Input calibration (learning) for analog and RC control.
    • Optional CRC error detection eliminates communication errors caused by noise or software faults.
    • Reversed power protection.
    • Field-upgradeable firmware.
    • Optional feedback potentiometer disconnect detection.


    Motor channels: 1
    Operating voltage: 6 – 16 V
    Continuous output current: 12 A
    Peak output current: 30 A
    Auto-detect baud rate range: 300 – 115,200 bps
    Available fixed baud rates: 300 – 115,200 bps
    Available PWM frequencies: 20 kHz, 5 kHz
    Reverse voltage protection?: Yes
    USB connector style: USB Mini-B



    Size: 1.35″ x 1.85″
    Weight: 0.5 oz

    General specifications

    Motor driver: VNH2SP30
    Motor channels: 1
    Control interface: USB; non-inverted TTL serial;
    RC servo pulses; analog voltage1
    Minimum operating voltage: 6 V
    Maximum operating voltage: 16 V
    Continuous output current per channel: 12 A
    Peak output current per channel: 30 A
    Current sense: 0.13 V/A2
    Maximum PWM frequency: 20 kHz
    Minimum logic voltage: 4 V
    Maximum logic voltage: 5 V
    Reverse voltage protection?: Y


    1 Autodetects baud rates between 300 and 115,200 bps, or can be set to any fixed baud rate in this range.
    2 Current readings are converted to a digital number from 0-255.
    3 In RC mode, the pulses can be as low as 2V.

    Price: 99,95$
       (April 2012)
    Buy it here
    If you want to buy it, try following promotion code: XSIMJRK5
    Attention: this code is limited!

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