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ULN2803A: 8 Channel Darlington IC - Solenoid, DC & Stepper Motor Driver | Chips and bits | V.O.C.-Electronics
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arduino - Stepper Motor works at 5v, driver explodes at 12v? - Electrical Engineering Stack Exchange
PIC to ULN2803 to Stepper Motor Interface | Electronics Forum (Circuits, Projects and Microcontrollers)
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