Any good tutorial of how to control a small 4.5v dc motor with arduino?

rickharris5 years ago
IF it's hardware advice you want then try here Although not directly for the 'duino it is still applicable

Software you will have to look for suitable library programmes or write your own - That's why I don't use them the Picaxe is much easier IMHO.
bwrussell5 years ago
Either search here on instructables or check out
ar317915 years ago

I would also put a diode in parallel with the motor ("pointing" towards the positive supply) for protection.