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Our Code: SKU-002570
Supplier: [Pololu MPN:1394]
The jrk 21v3 motor controller is a highly configurable brushed DC motor controller that supports four interface modes: USB, logic-level serial, analogue voltage, and hobby radio control (RC).
The 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. Analogue 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.
Key improvements over competing products and earlier Pololu motor controllers with feedback include:
Note: A USB A to mini-B cable (not included) is required to connect this controller to a computer.
|Operating voltage:||5 – 28 V|
|Continuous output current:||3 A|
|Peak output current:||5 A|
|Auto-detect baud rate range:||300 – 115,200 bps|
|Available fixed baud rates:||300 – 115,200 bps|
|Available PWM frequencies:||20 kHz, 5 kHz|
|Reverse voltage protection?:||Yes|
|USB connector style:||USB Mini-B|
The jrk 21v3 is the smaller of two jrk motor controllers. For a higher-power version, see the jrk 12v12.
The jrk 21v3 is available in two versions: “fully assembled” with terminal blocks and 0.1″ male header pins pre-installed (left picture above), and connector-free (right picture above). The connector-free version includes a straight 0.1″ breakaway male header strip and two 3.5mm, 2-pin terminal blocks, but these parts are not soldered to the board, which allows for custom installations.
The three mounting holes are intended for use with #2 screws (not included).
|Size:||1.35" x 1.35" x 0.5"|
USB; non-inverted TTL serial;
RC servo pulses; analogue voltage1
|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/A2|
|Maximum PWM frequency:||20 kHz|
|Minimum logic voltage:||4 V3|
|Maximum logic voltage:||5 V|
|Reverse voltage protection?:||Y|
The user’s guide for the Jrk 21v3 USB Motor Controller and the Jrk 12v12 USB Motor Controller.
The Pololu USB SDK contains example code 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.
An application note about using AutoHotkey for Windows to control Pololu USB products.