AVT1814 A - unipolar stepper motor driver. PCB board - Kamami on-line store
Stepper Motor Driver DC10V to 26V 4 Phase 5 Wire Unipolar High Speed Motor Controller Module for Automation Equipment : Amazon.co.uk: Business, Industry & Science
Unipolar Stepper Motor Driver Using Transistors and L297 (5) | Circuit Ideas I Electronic DIY Projects I Robotics
3A Unipolar Stepper Motor Driver - Electronics-Lab.com
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ULN2003 Unipolar Stepper Motor Driver (0.5A) - Creatron Inc