Arduino/Junk pile stepper motor survey

The purpose of this page is to record the wiring of junked stepper motors to arduino motor shields.

Stepper motors have 4 or more wires going into them. Not all motors with 4 or more wires are stepper motors. Typically these motors do not settle down and display a constant ohm value. Instead the resistance reading go to zero or infinity. Switching the polarity of the probes measuring resistance causes different resistance values.

There are two adafruit motor shield versions, with different libraries: The sparkfun monster motor shield only comes with an example, not a library.
 * V2 adafruit motor shield library
 * V1 adafruit motor shield library

Next Steps

 * Attach motor shield to larger power source .. 9-12volts .. perhaps up to 1.5amps. See how motor strength improves and how chips on motor shield heat up.
 * Get spark fun motor shields working .. suppose to handle more power
 * Count teeth on the gears to see if there are standards that can be leveraged
 * Research PC power supply specifications to see if they are going to be useful
 * Figure out how fast the motors can rotate .. some seem pretty slow .. this may be due to the stepper motor program or sketch.