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Jrk 21v3 USB Motor Controller with Feedback (Connectors Soldered)
Not recommended for new designs: We strongly recommend our newer and better (and smaller) Jrk G2 21v3 USB Motor Controller with Feedback over this controller, as it offers increased power and many other improvements at a lower price. We are continuing to offer the original Jrk 21v3 for now as a legacy product for those with systems designed specifically for this controller.
OverviewThe Jrk 21v3 is a versatile, general-purpose motor controller that supports a variety of interfaces, including USB. The broad operating range from 5 V to 28 V and continuous output current of 3 A (5 A peak) allow this board to control most small DC brushed motors. Analog voltage and tachometer (frequency) feedback options allow quick implementation of closed-loop servo systems, and a free configuration utility (for Windows) allows easy calibration and configuration through the USB port. A USB A to mini-B cable (not included) is required to connect this controller to a computer.
Key improvements over competing products and earlier Pololu motor controllers with feedback include:
- USB connectivity with emulated serial (COM) port allows direct motor control from a PC.
- Ultrasonic PWM to eliminate switching-induced motor shaft hum or whine.
- Robust, high-speed communication protocol with user-configurable error condition response.
- High internal resolution (12 bits) for smooth and flexible calibration to various input and feedback devices.
- Current sensing and limiting.
- Reversed power protection.
- Field-upgradeable firmware.
The table below lists the members of the Jrk family, including the original (green) and newer G2 (black) versions, and shows the key differences among them.
table.active_controller_comparison td.spacer {border: none; background: white;} table.active_controller_comparison td.white {background: white};Jrk 21v3 |
Jrk G2 21v3 |
Jrk G2 18v19 |
Jrk G2 24v13 |
Jrk G2 18v27 |
Jrk G2 24v21 |
|
|---|---|---|---|---|---|---|
| Recommended max operating voltage: |
28 V(1) | 28 V(1) | 24 V(2) | 34 V(3) | 24 V(2) | 34 V(3) |
| Max nominal battery voltage: |
24 V | 24 V | 18 V | 28 V | 18 V | 28 V |
| Max continuous current (no additional cooling): |
2.5 A* | 2.6 A | 19 A | 13 A | 27 A | 21 A |
| USB, TTL serial, Analog, RC control: |
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| I²C control: | ||||||
| Hardware current limiting: | ||||||
| Dimensions: | 1.35″ × 1.35″ | 1.0″ × 1.2″ | 1.4″ × 1.2″ | 1.7″ × 1.2″ | ||
| Price: | $74.95 | $54.95 | $109.95 | $109.95 | $149.95 | $149.95 |
| 1 Transient operation ( | ||||||