umm, thats not what you want according to what you said
you should connect the high power supply -only- to the servo's + pin and NOT to the arduino
power the arduino from the wall adapter or USB as normal
Selaseth wrote:Hey thanks, I was wondering what that cable (splitter) was for. I'll try that out! Yes, I was worried, it would fry my arduino as the servocity guy said i would at least need 3 amps
Hey, glad it helped.
BTW I don't know what you're using it for, but my local Academy Sports has 6V SLA batteries cheap. With looooong Ah ratings. If you're pulling that much current, I'd look at that over NiHM packs. (assuming you have the space and can handle the weight etc)
I'm using it for a sound installation to wind up cable to open a lever to let sand out of a 3m hourglass..lots of force required.
Btw, my splitter is such that it looks more like its for attaching two servos on one port instead of being able to attach an external power source.. What I'll do as soon as i get my 6V / 20ams transformator is to attach it directly to the servo via the +/- pins and attach the signal cable to the signal pin on the arduino.