I'm researching through the forum and trying to make my own plant watering system. However I have a small puzzle. I have the following 12v windshield washer pump ( Taap 5-741). Which is a 12v cheap pump from the local auto parts place. I figured they would all be the same. However if I hook it up directly to a wall wart power supply at 12v 1A - then it pulses on briefly about once a second. It's not a continuous pumping action. Does the input need to be some kind of PWM signal? I'm not sure why it would pulse. Are there different types of these pumps? This post ( http://forum.arduino.cc/index.php?topic=284943.0 ) shows I probably need a bigger PSU - but I would appreciate some help as to what would be sufficient. I guessed that with not enough amperage (I've seen up to 3A recommended in various forum posts) - then it would just pump slowly? But I guess not :) I know code, not electrons - sorry for the repeat question!
Thanks, Wilks (edit: forgot link)