Jrk 21v3 USB Motor Controller with Feedback (Connectors Soldered)

Pololu item #: 1394 12 in stock
Brand: Pololu
Status: Not Recommended for New Design 
RoHS 3 compliant
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Price break Unit price (US$)
1 51.95
10 46.76
50 36.35


backorders allowed

The Jrk 21v3 motor controller is a highly configurable brushed DC motor controller that supports four interface modes: USB, logic-level serial, analog voltage, and hobby radio control (RC). The controller can be used with feedback for closed-loop speed or position control, or it can be used without feedback as an open-loop speed control. The continuous output current is approximately 3 A in the recommended operating range of 8 V to 28 V, with derated performance down to 5 V and transient protection to 40 V. This version ships with connectors installed as shown (no soldering required).

Alternatives available with variations in these parameter(s): version Select variant…

 Description Specs (15) Pictures (21) Resources (11) FAQs (2) On the blog (1) 

Pololu Jrk 21v3 USB motor controller with included hardware soldered in (fully assembled).

Pololu Jrk 21v3 USB motor controller with dimensions.

Pololu Jrk 21v3 USB motor controller with feedback, labeled top view.

Comparison of the newer Jrk G2 21v3 (black PCB) with the original Jrk 21v3 (green PCB).

The Input tab of the Jrk Configuration Utility

The Feedback tab of the Jrk Configuration Utility

The PID tab of the Jrk Configuration Utility

The Motor tab of the Jrk Configuration Utility

The Errors tab of the Jrk Configuration Utility

The Jrk plot window, showing overshooting (Derivative Coefficient = 0).

The Jrk plot window, showing undershooting (Derivative Coefficient = 10).

The Jrk plot window, optimized derivative term (Derivative Coefficient = 7.5).

The Jrk plot window, showing how the integral term can reduce the error to near zero.

The Jrk plot window, showing all variables simultaneously.

A basic feedback system controlling a LEGO turret with the Jrk 21v3, front view.

A basic feedback system controlling a LEGO turret with the Jrk 21v3.

USB control.

TTL serial control.

RC / pulse width control.

Analog control.

Connecting a linear actuator with feedback to a Jrk 21v3 motor controller.


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Pololu Jrk Motor Controllers with Feedback
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