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Jrk 21v3 USB Motor Controller with Feedback
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 included but not soldered in, allowing for custom installations.
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| Description | Specs (16) | Pictures (23) | Resources (11) | FAQs (2) | On the blog (4) |
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Pololu Jrk 21v3 USB motor controller. |
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Pololu Jrk 21v3 USB motor controller with dimensions. |
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Pololu Jrk 21v3 USB motor controller with feedback, labeled top view. |
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Pololu Jrk 21v3 USB motor controller with included hardware. |
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Pololu Jrk 21v3 USB motor controller with included hardware soldered in (fully assembled). |
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Comparison of the newer Jrk G2 21v3 (black PCB) with the original Jrk 21v3 (green PCB). |
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The Input tab of the Jrk Configuration Utility |
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The Feedback tab of the Jrk Configuration Utility |
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The PID tab of the Jrk Configuration Utility |
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The Motor tab of the Jrk Configuration Utility |
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The Errors tab of the Jrk Configuration Utility |
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The Jrk plot window, showing overshooting (Derivative Coefficient = 0). |
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The Jrk plot window, showing undershooting (Derivative Coefficient = 10). |
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The Jrk plot window, optimized derivative term (Derivative Coefficient = 7.5). |
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The Jrk plot window, showing how the integral term can reduce the error to near zero. |
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The Jrk plot window, showing all variables simultaneously. |
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A basic feedback system controlling a LEGO turret with the Jrk 21v3, front view. |
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A basic feedback system controlling a LEGO turret with the Jrk 21v3. |
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USB control. |
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TTL serial control. |
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RC / pulse width control. |
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Analog control. |
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Connecting a linear actuator with feedback to a Jrk 21v3 motor controller. |
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