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Pololu Jrk 21v3 USB Motor Controller with Feedback

€77.80 *

Prices plus VAT plus shipping costs

currently out of stock. Can be back-ordered.

Manufacturer: Pololu
Order number: EXP-R25-062
Manufacturer part number: 1394
country of origin: US
HS code: 85423190
Weight (kg): 0.012

The jrk 21v3 is a versatile, general-purpose motor controller that supports a variety of... more

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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:

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.

Note: A USB A to mini-B cable (not included) is required to connect this controller to a computer.

Main Features of the Jrk 21v3:

Simple bidirectional control of one DC brush motor.
5 V to 28 V operating supply range.
3 A maximum continuous current output (5 A peak).
Four communication or control options:
- USB interface for direct connection to a PC.
- Full-duplex, TTL-level asynchronous serial interface for direct connection to microcontrollers or other embedded controllers.
- Hobby radio control (RC) pulse width interface for direct connection to an RC receiver or RC servo controller.
- 0–5 V analog voltage interface for direct connection to potentiometers and analog joysticks.
Two closed-loop feedback options:
- 0–5 V analog voltage.
- Frequency/tachometer digital input up to 2 MHz with 1 ms PID period.
- (Open-loop control with no feedback also available.)
Simple configuration and calibration over USB with free configuration program (Windows 8, Windows 7, Vista, and Windows XP compatible).
Configurable parameters include:
- PID period and PID constants (feedback tuning parameters).
- Maximum current.
- Maximum duty cycle.
- Maximum acceleration.
- Error response.
- Input calibration (learning) for analog and RC control.
Optional CRC error detection eliminates communication errors caused by noise or software faults.
Reversed power protection.
Field-upgradeable firmware.
Optional feedback potentiometer disconnect detection.
Comprehensive user’s guide.

The jrk 21v3 is the smaller of two jrk motor controllers. For a higher-power version, see the jrk 12v12.

Dimensions:

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 serial²
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

Notes:

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

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