Available with a lead time
Expect dispatch between Sep 05 and Sep 09
Quantity Discounts:
With integrated support for analog voltage or tachometer (frequency) feedback, the second-generation G2 family of Jrk motor controllers makes it easy to add closed-loop control of speed or position (but not both!) of a single brushed DC motor to a variety of projects. These versatile, general-purpose modules support five different control interfaces: USB for direct connection to a computer, TTL serial and I²C for use with a microcontroller, RC hobby servo pulses for use in an RC system, and analog voltages for use with a potentiometer or analog joystick. They also offer many settings that can be configured using Pololu's free configuration software utility for Windows, Linux, and macOS. This software simplifies initial setup of the device and allows for in-system testing and monitoring of the controller via USB (a micro-B USB cable is required to connect the Jrk G2 to a computer).
The table below lists the members of the Jrk family, including the original (green) versions, and shows the key differences among them.
Jrk 21v3 | Jrk 12v12 | Jrk G2 21v3 | Jrk G2 18v19 | Jrk G2 24v13 | Jrk G2 18v27 | Jrk G2 24v21 | |
---|---|---|---|---|---|---|---|
Recommended max operating voltage: | 28 V(1) | 16 V | 28 V(1) | 24 V(2) | 34 V(3) | 24 V(2) | 34 V(3) |
Max nominal battery voltage: | 24 V | 12 V | 24 V | 18 V | 28 V | 18 V | 28 V |
Max continuous current (no additional cooling): | 2.5 A* | 12 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" | 1.85" × 1.35" | 1.0" × 1.2" | 1.4" × 1.2" | 1.7" × 1.2" | ||
1 Transient operation (< 500 ms) up to 40 V. 2 30 V absolute max. 3 40 V absolute max. * Reduced from “3 A” based on newer, more stringent tests. The value now is directly comparable to the rating for the newer G2 21v3. |
Pololu Jrk G2 18v19 USB Motor Controller with Feedback controlling an industrial-duty linear actuator with an RC receiver. |
---|
Pololu Jrk G2 18v27 USB Motor Controller with Feedback controlling a high-power motor from USB. |
---|
Main features of the Jrk G2 family
Details for item #3142
The Jrk G2 21v3 operates from 4.5 V to 28 V and can deliver a continuous output current of 2.6 A (5 A peak) without a heat sink. The controller supports transient operation (< 500 ms) up to 40 V, and the maximum recommended nominal battery voltage is 24 V. This version has header pins and terminal blocks included but not soldered, so soldering is required to use it.
A version is also available that requires no soldering to use as the terminal blocks and main header pins are already installed.
Included hardware
The Jrk ships with a 0.1" breakaway male header strip and two 2-pin 3.5mm terminal blocks. You can solder the terminal blocks to the four large through-holes to make your motor and motor power connections (see Pololu's short video on terminal block installation), or you can solder a couple of 2-pin pieces of the 0.1" header strip into the smaller through-holes above and below these larger holes.
Pieces from the 0.1" header strip can be soldered into the small holes on the logic connection side of the board to enable use with solderless breadboards, perfboards, or 0.1" connectors. For the most compact installation, you can just solder wires directly to the holes.
Note: A USB A to micro-B cable (not included) is required to connect the Jrk G2 to a computer for initial configuration.
Comparison to the original Jrk motor controllers
The Jrk G2 family features a number of improvements compared to Pololu's original two Jrk motor controllers (21v3 and 12v12). Most importantly, the Jrk G2 controllers support both higher operating voltages and larger output currents while being even more compact than their predecessors. Other new features include:
Comparison of the newer Jrk G2 21v3 (black PCB) with the original Jrk 21v3 (green PCB). |
---|
The Jrk G2 controllers are not drop-in replacements for the original Jrk controllers because of differences in their form factors and pin arrangements, although wiring changes should be straightforward. The Jrk G2 serial protocol is compatible with (and generally a superset of) the original Jrk serial protocol, so in many cases, serial interface software running on a microcontroller or computer will not need to be modified to work with a Jrk G2.
Dimensions
Size: | 1.2" × 1.0" × 0.3"1 |
---|---|
Weight: | 4.5 g1 |
General specifications
Motor channels: | 1 |
---|---|
Control interface: | USB; non-inverted TTL serial; I²C; RC servo pulses; analog voltage |
Minimum operating voltage: | 4.5 V2 |
Maximum operating voltage: | 28 V3 |
Continuous output current per channel: | 2.6 A4 |
Maximum PWM frequency: | 20 kHz |
Reverse voltage protection?: | Y |
Version: | G2 21v3 (28 V max, 2.6 A max continuous) |
Connectors soldered?: | N |
Identifying markings
PCB dev codes: | umc06a |
---|---|
Other PCB markings: | 0J11316 |
Notes:
Documentation and other information
Jrk G2 Motor Controller User’s Guide (Printable PDF)
User’s manual for the Pololu Jrk G2 USB Motor Controllers with Feedback.
File downloads
Jrk G2 Software and Drivers for Windows (11MB msi)
Jrk G2 Software for Linux (x86) (9MB xz)
Jrk G2 Software for macOS (8MB pkg)
Dimension diagram of the Jrk G2 21v3 USB Motor Controller with Feedback (215k pdf)
Dimension diagram of the Jrk G2 18v19 and 24v13 motor controllers (220k pdf)
Dimension diagram of the Jrk G2 18v27 and 24v21 motor controllers (208k pdf)
3D model of the Jrk G2 21v3 USB Motor Controller with Feedback (11MB step)
3D model of the Jrk G2 18v19 and 24v13 motor controllers (11MB step)
3D model of the Jrk G2 18v27 and 24v21 motor controllers (11MB step)
Drill guide for the Jrk G2 21v3 USB Motor Controller with Feedback (59k dxf)
This DXF drawing shows the locations of all of the board’s holes.
Drill guide for the Jrk G2 18v19 and 24v13 motor controllers (83k dxf)
This DXF drawing shows the locations of all of the board’s holes.
Drill guide for the Jrk G2 18v27 and 24v21 motor controllers (95k dxf)
This DXF drawing shows the locations of all of the board’s holes.
Recommended links
This is a library for the Arduino IDE that helps interface with a Jrk G2 USB Motor Controller with Feedback using serial or I²C.
This repository contains the source code of the Pololu Jrk G2 Configuration Utility (jrk2gui) and the Pololu Jrk G2 Command-line Utility (jrk2cmd). It also has drivers for Windows and build instructions.
Exact shipping can be calculated on the view cart page (no login required).
Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).
We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):
Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.
Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.
International Orders - the following rates are for New Zealand and will vary for other countries:
If you order lots of gear, the postage amount will increase based on the weight of your order.
Our physical address (here's a PDF which includes other key business details):
Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia
Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.
Have a product question? We're here to help!
Makers love reviews as much as you do, please follow this link to review the products you have purchased.
Product Comments