The EasyDriver V4.5 has an A3967 microstepping driver to control bi-polar motors, and motors wired as bi-polar. I.e. 4,6, or 8 wire stepper motors. EasyDriver requires a 6V to 30V supply to power the motor and can power any voltage of stepper motor.
A tutorial to connect the EasyDriver to the Arduino can be found here.
More information is available on the website of manufacturer Sparkfun.
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