How to reuse 4 and 6 wires stepper motors for your projects – Renzo Mischianti
Amazon.com: DC 5V-9V 12V 2 Phase 4 Wire Stepper Motor Linear Rail 90mm Stroke Lead Screw Linear Stage Actuator with Nut Slider Step Angle 18 Degree for DIY Laser Engraving Machine :
Driving a mini 2-phase 4-wire stepper motor - #16 by MarkT - Motors, Mechanics, Power and CNC - Arduino Forum