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Pololu Jrk 21v3 USB Motor Controller with Feedback
 
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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 8–28 V, with derated performance down to 5 V and transient protection to 40 V. The board ships with connectors included but not soldered in, allowing for custom installations.
Compare all products in Pololu Jrk Motor Controllers with Feedback.
| Description | Specifications (15) | Pictures (21) | Resources (8) | FAQs (2) |
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Documentation and other information
Pololu Jrk USB Motor Controller User’s Guide
(Printable PDF: jrk_motor_controller.pdf)
The user’s guide for the Jrk 21v3 USB Motor Controller and the Jrk 12v12 USB Motor Controller.
The Pololu USB SDK contains the code you need for making your own applications that use native USB to control the Jrk Motor Controller, Maestro Servo Controller, Simple Motor Controller, or USB AVR Programmer.
Application Note: Using AutoHotkey with Pololu USB Products
(Printable PDF: application_note_autohotkey.pdf)
An application note about using AutoHotkey for Windows to control Pololu USB products.
File downloads
- Drivers and configuration utility for jrk 21v3 and jrk 12v12 motor controllers (5MB zip)
- This compressed archive contains the drivers that Windows needs to recognize the jrk as well as the Windows XP/Vista/7 software that allows configuration of the jrk.
- jrk 21v3 settings for LACTxP linear actuators (1k txt)
- Use a jrk 21v3 to precisely control our LACTxP linear actuators with feedback. Instructions for using this file can be found on the linear actuator product pages.
Recommended links
- The Haunted Organist
- A spooky animatronic skeleton using the Jrk USB Motor Controller. See the final result or more pictures and information. By Mark Goodson, October 2009.
- R2D2 dome position control
- A replica of the famous Star Wars droid R2D2 that uses the Jrk USB Motor Controller for position control. See the video which shows the Jrk Configuration Utility in action, or read the blog post which has more information. By ggpipe, February 2010.
- Microsoft .NET Framework 3.5
- The Microsoft .NET Framework version 3.5 is required for many Pololu configuration, control, and utility programs under Windows. Most computers will have this installed already or can automatically install it over the internet, but you can also get .NET 3.5 directly from Microsoft at this link. If you are installing on a computer without internet access, make sure to get the Full Redistributable Package.
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