JRK 21V3 USB Motor Controller with Feedback (Pololu)

Description: 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



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 7, Vista, or Windows XP) allows easy calibration and configuration through the USB port.



Features:

• 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.

• Motor driver: MC33926
• Motor channels: 1
• Control interface:
  • USB
  • Non-inverted TTL serial
  • RC servo pulses
  • Analog voltage
• 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/A
• Maximum PWM frequency: 20 kHz
• Minimum logic voltage: 4 V () In RC Mode it can be 2V
• Maximum logic voltage: 5 V
• Reverse voltage protection?: Y
• Partial kit?: Y

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

• User Guide
• Drivers & Configuration Utility
• USB Software development Kit

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