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touch sensitive button

Discussion in 'General Electronics Discussion' started by FlashCreated, Sep 28, 2010.

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  1. FlashCreated

    FlashCreated

    24
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    Mar 22, 2010
    hi,

    Does anyone know of (or can you create) a circuit for a touch sensitive button (as in if i touch a peice of metal it switches somthing). When i touch the sensitive area it outputs 5v to an output.

    Hope i'm clear enough.:eek:

    Thanx in advance!!!:D

    FlashCreated
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,411
    2,779
    Jan 21, 2010
    This fairly obscure site will help you.

    There are several types of touch switch. You're going to have to determine which one best suits your application.
     
  3. FlashCreated

    FlashCreated

    24
    0
    Mar 22, 2010
    oh thanx!!!
    i'd actualy seen that site and that scematic but i was wondering if there were any more simple ways of dooing it. And i need it output nothining when i'm not touch it and 4,5v wen i am.

    Any ideas???

    thanx in advance!!:D

    FlashCreated
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,411
    2,779
    Jan 21, 2010
    There are several types of touch switch. You're going to have to determine which one best suits your application.

    So do you want resistive, capacitive, or "hum pickup"?

    What is your application.

    We can't operate in a vacuum. You give me no information, I tell you to google, you respond saying pretty much nothing more except "they're too complex" and expect an answer.

    We need more details.

    what is it to switch?

    powered by what?

    preferred triggering mechanism?

    Feel free to add more detail...
     
  5. FlashCreated

    FlashCreated

    24
    0
    Mar 22, 2010
    ok... sorry.

    this is part of a room automation project i'v got gowing... i need to send a high signal 4,5 V to parrallel port when i touch my door handel. so i'm gessing capasitive. i need to attach a wire to the door handel so that when i touch it to open the door the pc knows about it.

    Hope that filled you in.:eek:

    FlashCreated
     
  6. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,411
    2,779
    Jan 21, 2010
    Googling for "touch switch doorknob" yielded this.
     
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