Stepper Motor

How to wire up the larger stepper motor from SparkFun using an H-Bridge (SN754410):

bipolar_stepper

 

bipolar_stepper_dd

(Images adapted from https://www.arduino.cc/en/Reference/StepperBipolarCircuit)

This motor requires 12V and up to 330mA of current. Red and Green wires are one coil, and Yellow and Blue the other coil. Motor datasheet showing wiring color codes: http://www.sparkfun.com/datasheets/Robotics/SM-42BYG011-25.pdf

Code samples – use the Arduino stepper library for easiest control:
http://arduino.cc/en/Reference/Stepper

Visual animation showing how they work inside:
https://ericjformanteaching.wordpress.com/2013/03/31/stepper-motor-animation-and-half-stepping/

More information from Tom Igoe’s excellent explanation:
http://www.tigoe.net/pcomp/code/circuits/motors/stepper-motors

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