Description
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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Additional information
Customs Tariff Number:
Country of origin:
This depends on where you are located. After the order is handed over to UPS, the delivery time in Germany is about 2-3 days, within Europe about 1 week.
We ship our orders with UPS (United Parcel Service).
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