Pololu Jrk 12v12 USB Motor Controller with Feedback
 

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.

מאפיינים

• 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.
• Comprehensive user’s guide.

מפרט