Replacement: None. There is no direct replacement for this motor driver. This page is for reference only.
Description: The jrk 21v3, from Pololu, is a versatile, general-purpose brushed DC motor controller that supports a four control interfaces: USB, TTL asynchronous serial, PWM and 0-5V analog voltage. The broad operating range (5V to 28V) and continuous output current (3A, 5A 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.
The jrk 21v3 is the smaller of two jrk motor controllers. For a higher-power version, see the jrk 12v12.