Datasheet

If you don't have to take your project on the go, a 9V 1A (http://adafru.it/dO6), 12V

1A (http://adafru.it/eny), or 12V 5A w (http://adafru.it/enz)ill work nicely

99% of 'weird motor problems' are due to having a voltage mismatch (too low a voltage,

too high a voltage) or not having a powerful enough supply! Even small DC motors can

draw up to 3 Amps when they stall.

https://learn.adafruit.com/adafruit-dc-and-stepper-motor-hat-for-

raspberry-pi

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