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) allows easy calibration and configuration through the USB port. A USB A to mini-B cable (not included) is required to connect this controller to a computer.

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.

The table below lists the members of the Jrk family, including the original (green) and newer G2 (black) versions, and shows the key differences among them.

	Jrk 21v3	Jrk G2 21v3	Jrk G2 18v19	Jrk G2 24v13	Jrk G2 18v27	Jrk G2 24v21
Recommended max operating voltage:	28 V(1)	28 V(1)	24 V(2)	34 V(3)	24 V(2)	34 V(3)
Max nominal battery voltage:	24 V	24 V	18 V	28 V	18 V	28 V
Max continuous current (no additional cooling):	2.5 A*	2.6 A	19 A	13 A	27 A	21 A
USB, TTL serial, Analog, RC control:
I²C control:
Hardware current limiting:
Dimensions:	1.35″ × 1.35″	1.0″ × 1.2″	1.4″ × 1.2″		1.7″ × 1.2″
Price:	$74.95	$54.95	$109.95	$109.95	$149.95	$149.95
1 Transient operation ( ×