questions

MacGeek117MacGeek117 Posts: 747
edited 2005-01-11 - 16:54:58 in General Discussion
How do you connect a mic to a BS2, what is a motor driver circuit for the L293D chip,
and how do you modify a servo (standard Parallax) into a CR servo? burger.gif

Comments

  • MacGeek117MacGeek117 Posts: 747
    edited 2005-01-09 - 02:42:20
    (bugg) I'm sorry, I meant to put this on the Sandbox.
  • Jim McCorisonJim McCorison Posts: 359
    edited 2005-01-09 - 03:16:00
    Bugg,

    See the first post in this forum about moving threads to a different forum.

    Jim
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2005-01-09 - 14:17:27
    As to your question, at least 2 of these topics were very recently covered...Try the search feature.· cool.gif

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    Chris Savage

    Knight Designs
    324 West Main Street
    P.O. Box 97
    Montour Falls, NY 14865
    (607) 535-6777

    Business Page:·· http://www.knightdesigns.com
    Personal Page:··· http://www.lightlink.com/dream/chris
    Designs Page:··· http://www.lightlink.com/dream/designs
    ·
  • MacGeek117MacGeek117 Posts: 747
    edited 2005-01-09 - 18:45:01
    Will do. Thanks guys, but still, how do you connect a microphone
    (like the Shack's 270-090) to the Basic Stamp? -bugg
  • MacGeek117MacGeek117 Posts: 747
    edited 2005-01-09 - 21:21:18
    Oh, by the way I can't get the search to work- I guess I'll try again -bugg

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    So many projects, so little time.
  • MacGeek117MacGeek117 Posts: 747
    edited 2005-01-09 - 21:37:57
    Okay, I did get the search to work. thanks again.


    bugg

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    So many projects, so little time.
  • RickBRickB Posts: 395
    edited 2005-01-10 - 04:06:15
    Bugg: The stamp is much to slow to deal with amplified audio from a mic. Having said that, there are things that can be done once the audio has been squared up and converted to logic levels. You can then measure the average frequency or measure pulse width. If you are dealing with steady tones, then meaningful calculations can be made, but making heads or tails of voice audio is a lost cause. It would help to state what you want to accomplish with the mic. As you have found, the search engine has been on vacation for some time now.

    Rick
  • MacGeek117MacGeek117 Posts: 747
    edited 2005-01-10 - 17:44:31
    Guys, you know what the Clapper is, right, well that is what I want the BS2 to do.

    bugg

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    So many projects, so little time.
  • Paul BakerPaul Baker Posts: 6,351
    edited 2005-01-10 - 18:41:16
    easy enough, your just measuring dBs. Set up the mic in typical bias (chipcorder pdfs show the circuit, online search should also show some example circuits) amp the output, then feed it to something like this circuit:

    http://forums.parallax.com/showthread.php?p=520684

    (ie integrate the signal, compare the amplitude of the signal to some threshhold, then·extend the pulse width)

    Though this circuit may provide false positives (turn your stereo way up and the lights will switch on and off) if you want a "smarter" unit, youll need a bandpass after the first amp tuned to a frequency that is above a woofer's response, knock the pulse extender off the circuit and use the BS to measure the pulse width, rejecting all signals outside a range of acceptable pulse widths. Whether this is capable of being achieved using a BS, I cannot answer (Im a SX user).

    Paul

    Post Edited (Paul Baker) : 1/10/2005 6:48:35 PM GMT
  • MacGeek117MacGeek117 Posts: 747
    edited 2005-01-11 - 16:54:58
    Thanks, Paul. Actually, the woofer is what I'm trying to do.
    You would make a loud noise and my Boe-Bot would start moving.

    bugg

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    So many projects, so little time.
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