Help with servos

Discussion in 'The Projects Forum' started by urbanzrim, Sep 5, 2013.

  1. urbanzrim

    Thread Starter New Member

    Sep 5, 2013
    4
    0
    Hello,

    I'm working on a project to control 5 servos with ARM7 processor. But I have one problem and would be greatful if you could please help me. The thing is, I can turn 3 of them, but never 4 or 5. The pins are all alright, I tried to control only 1st and 2nd and then 2nd and 3rd and so on and they turned separetly, but never more than 3. I have them connected directly to the pins. Power source is good (I have 4 D batteries in series), but I think it could draw to much signal current when I want to turn more than 3? Or do you think maybe it's possible that they are not on the same ground (microcontroller and servos)? The microcontroller is powered from USB and servos are from batteries. Or do you think I should connect some sort of amplifier from output pin to servo signal or some sort of voltage buffer?

    Thank you very much in advance!
     
  2. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,769
    969
    schematic?
    maybe its your code..
     
  3. urbanzrim

    Thread Starter New Member

    Sep 5, 2013
    4
    0
    Had solved it! Thank you anyway. The problem was not having common ground.
     
Loading...