forward and reverse rc servo with a single throw switch?

Discussion in 'The Projects Forum' started by rccarnut, Nov 29, 2011.

  1. rccarnut

    Thread Starter New Member

    Nov 29, 2011
    1
    0
    hello all,
    this is my first time here and i need a little help. i found my way here searching for info on reversing a rc servo with the single throw switch on my tx. i found a short video of what i want to do any help on what circuitry i need to make this work would be greatly appreciated.
    http://www.youtube.com/watch?v=7qt2dY9jLyY
     
  2. THE_RB

    AAC Fanatic!

    Feb 11, 2008
    5,435
    1,305
    You can use a 555 timer IC, as an astable frequency generator with the correct duty cycle to give the waveform for RC servo position 1.

    Then a switch can short out a resistor (or change over a resistor) in the timer and change the duty cycle, so the RC servo will then move to position 2.

    If you use a couple of pots for the resistors that control duty cycle you can set each position with a pot, then use the switch to move from position 1 to position 2.
     
  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Hmm - I think that there is just a bit more to it than that, Roman.

    RCcarnut,
    You mentioned "servo", but need to verify:
    Is it a servo that rotates 360 degrees continuously?
    Or is it a servo that you want to run all the way to the right, then back to center, then all the way to the left, then back to center?
    Or is it a DC motor that you wish to run forwards & backwards?

    What voltage(s) do you have to work with?
     
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