The jrk 21v3 motor controller (3Amp continuous, 5A peak) 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. Operates from 8-28V.
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. 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.
Key improvements over competing products and earlier Pololu motor controllers with feedback include:
Pololu jrk 21v3 USB motor controller with included hardware
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 14×1 straight 0.100" 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 0.4"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|
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.
An application note about using AutoHotkey for Windows to control Pololu USB products.