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Jrk G2 21v3 USB Motor Controller with Feedback (Connectors Soldered)

Pololu item #: 3143
Brand: Pololu supply outlook
Status: Active and Preferred 
RoHS 3 compliant


Price break Unit price (US$)
1 61.95
5 56.99
25 52.43
100 48.24


backorders allowed

This compact motor controller makes closed-loop speed or position (but not both!) control of a brushed DC motor easy, with quick configuration over USB using our free software. It supports five control interfaces: USB, TTL serial, I²C, analog voltage (potentiometer), and hobby radio control (RC). This version offers a 4.5 V to 28 V operating range and can deliver continuous output currents up to 2.6 A (5 A peak) without a heat sink. This version ships with soldered header pins and terminal blocks.

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

 Description Specs (13) Pictures (9) Resources (16) FAQs (1) On the blog (2) 

Jrk G2 21v3 USB Motor Controller with Feedback (Connectors Soldered).

Jrk G2 21v3 USB Motor Controller with Feedback (Connectors Soldered), top view.

Jrk G2 21v3 USB Motor Controller with Feedback, bottom view with dimensions.

Basic pinout diagram of the Jrk G2 21v3 USB Motor Controller with Feedback (Connectors Soldered).

Jrk G2 21v3 USB Motor Controller with Feedback, bottom view.

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

Side-by-side comparison of the different Jrk G2 USB Motor Controllers with Feedback.

The graph window in the Jrk G2 Configuration Utility (version 1.2.0).

The main window and the variables window in the Jrk G2 Configuration Utility (version 1.2.0).


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