Because of the way a chopper driver works, the driver and motor actually form a sort of switching power supply. This means it plugs into a standard breadboard. SparkFun has been known to ship boards with resistors or capacitors missing. This means you can now control every aspect of the driver chip yourself. Arduino Example Code Notes : The example code assumes that the stepper is being controlled by Arduino pins 8, 9, 10 and 11, but you can use any set of four pins.
You don’t have to spend a lot of money to control motors with an Arduino or compatible board. Very reliable since there are no contact brushes in the motor. Why not follow things on twitter, Google+, subscribe for email updates or RSS using the links on the right-hand column, or join our forum – dedicated to the projects and related items on this website. Otherwise you may need to swap them over when you set both motors to forward and one goes backwards!
You will need to determine the A+, A-, B+ and B- wires. Note that this is current in addition to what’s needed to power the A3967 and LED. For each input voltage (to the M+ and GND pins) I increased the load on the 5V pin until the voltage started to dip from 5.00V indicating the regulator was going into thermal limit. Most people are perfectly happy running their ED at 12V, and there are tons of power supplies that work great at 12V and are cheap.