Pololu Jrk 21v3 USB Motor Controller with Feedback

Pololu Jrk 21v3 USB Motor Controller with Feedback
Pololu item #: 1392 146 in stock

Price break Unit price (US$)
1 49.95
10 44.95
50 34.95

backorders allowed

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.

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Size: 1.35" x 1.35" x 0.4"1
Weight: 0.23 oz

General specifications

Motor driver: MC33926
Motor channels: 1
Control interface: USB; non-inverted TTL serial;
RC servo pulses; analog voltage2
Minimum operating voltage: 5 V
Maximum operating voltage: 28 V
Continuous output current per channel: 3 A
Peak output current per channel: 5 A
Current sense: 0.5 V/A3
Maximum PWM frequency: 20 kHz
Minimum logic voltage: 4 V4
Maximum logic voltage: 5 V
Reverse voltage protection?: Y
Partial kit?: Y


Without included hardware.
Autodetects baud rates between 300 and 115,200 bps, or can be set to any fixed baud rate in this range.
Current readings are converted to a digital number from 0-255.
In RC mode, the pulses can be as low as 2V.

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