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Anybody figured out how to drive a servo from an audio unput signal? — Parallax Forums

Anybody figured out how to drive a servo from an audio unput signal?

MisterobotoMisteroboto Posts: 3
edited 2005-10-08 21:06 in BASIC Stamp
Esteemed geniuses -

I'm a newby! I have some old Interactive C in my head from my old crappy MIT handboard and LOVE the Basic Stamp. I was wondering if anybody has figured out how to take an output singla from an MP3, CD, or tape deck player and have that control a servo. Basic needs for a live, talking puppet. Ideas are very welcome.

Thanks much!

-Josh

Comments

  • Paul BakerPaul Baker Posts: 6,351
    edited 2005-10-06 18:21
    Hmmm, interesting concept, putting the issue of correlating sound to a mouth position aside, I don't know if a servo will be fast enough to move a puppet mouth in sync with a normal paced voice. Perhaps a stepper motor would be a better fit, though folks with more extensive experience with a variety of servos would be able to provide more guidance. People in the ParallaxEFX forum may be able to better assist you since they deal with making interactive props (but don't post a duplicate post there which is frowned upon behaviour). Go take a look at the posts over there, if after a few days the response to this post is lackluster in your opinion, send an email to ForumAdmin@parallax.com and ask them to move it over there.

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  • MisterobotoMisteroboto Posts: 3
    edited 2005-10-06 18:55
    HI Paul -

    Thanks for the feedback. I hear what you're saying stepper vs servo. In LA we did have to select servos carefully for speed / power for mouth movements, Some (the more expensive ones!) are very fast and can lipsync well if the mechanics are right. I'm going to go servo on this one, but I'll experiment with steppers down the road for sure.
  • Kenny GardnerKenny Gardner Posts: 169
    edited 2005-10-06 19:38
    Scary Terry Audio Servo Driver

    More Expensive products
  • Ryan ClarkeRyan Clarke Posts: 738
    edited 2005-10-07 20:20
    Have you looked at EFX lately?

    *hint hint*

    Ryan

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    Ryan Clarke
    Parallax Tech Support

    RClarke@Parallax.com
  • MisterobotoMisteroboto Posts: 3
    edited 2005-10-08 01:52
    You guys ROCK!!!! Thanks!
  • Kenny GardnerKenny Gardner Posts: 169
    edited 2005-10-08 21:06
    Have you looked at EFX lately?

    I have all the EFX stuff (am still waiting for my 2 Audio Play boards). I don't see a Audio Servo driver. Am I missing something?

    Such a board would fit in perfectly with the EFX scheme.

    I like the Scary Terry stuff because they are kits that you build yourself and he makes his boards as small as conceivably possible (using through hole parts).

    Kenny
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