Unipolar vs. Bipolar drive for stepper motors, Part 3: Drive ICs - Power Electronic Tips
Amazon.com: Stepper Motor Driver Controller, Forward and Reverse Control Pulse Speed PLC Serial Communication, DC 5~30V/4A Universal for NEMA 17/23 Motor : Industrial & Scientific
Digital Bipolar Stepper Motor Driver-32 bit DSP Based
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Pololu - DRV8434 Stepper Motor Driver Carrier
Dual Bipolar Stepper Motor Controller for Arduino - RobotShop
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Phidgets 10-30V 8A Single Bipolar Stepper Motor Driver - RobotShop
Amazon.com: A4988 Stepper Motor Driver Module for Pololu RepRap 3D Printer StepStick (Pack of 2) : Industrial & Scientific