Critical Velocity Enterprises, LLC - your source for high quality motor controllers.

Our speed controls feature easy to use interfaces ranging from simple analog control using a potentiometer or 0-5V signal to digital push button and logic interfaces for PLC's and microcontrollers.

What is PWM?
Answers to this and more in the FAQ Section!.

Featured Products:
15 Amp PWM Motor Speed Controller MORE INFO>> $ 46.95	9 Amp Bidirectional Motor Controller w/ Braking Forward and Reverse control MORE INFO>> $ 93.95	15 Amp High Frequency PWM Motor Speed Controller MORE INFO>> $ 52.95
Critical Velocity LCD Shield Kit for Arduino MORE INFO>> $ 13.95	Critical Velocity Terminal Block Shield Kit, Arduino Compatible MORE INFO>> $ 13.95	AVR Stamp, Arduino and Basic Stamp Compatible MORE INFO>> $ 29.95

Bipolar Stepper Motor Driver with Microstepping capability

The ST-1 Stepper Motor Driver allows you to drive a bipolar or unipolar stepper motor with up to 2.5 Amps per phase of current.

Selectable Full, 1/2, 1/4 and 1/8 step modes provides smooth operation and high resolution.

Opto-isolated STEP and DIRECTION inputs protect your control electronics.

ST-1 Bipolar Stepper Motor Driver