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USB Motor Controller with Feedback - Jrk 21v3

Replacement: None. There is no direct replacement for this motor driver. This page is for reference only.

The jrk 21v3, from Pololu, is a versatile, general-purpose brushed DC motor controller that supports a four control interfaces: USB, TTL asynchronous serial, PWM and 0-5V analog voltage. The broad operating range (5V to 28V) and continuous output current (3A, 5A peak) allow this board to control most small 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.

The jrk 21v3 is the smaller of two jrk motor controllers. For a higher-power version, see the jrk 12v12.

  • Simple bidirectional control of one DC brush motor
  • 5V to 28V operating supply range
  • 3A maximum continuous current output (5A peak)
  • Four communication or control options:
    1. USB interface for direct connection to a PC
    2. Full-duplex, TTL-level asynchronous serial interface for direct connection to microcontrollers or other embedded controllers
    3. Hobby radio control (RC) pulse width (PWM) interface for direct connection to an RC receiver or RC servo controller
    4. 0?5V analog voltage interface for direct connection to potentiometers and analog joysticks


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