Tap-Tempo Switch Type

Discussion in 'The Projects Forum' started by DanRilley, Jun 3, 2008.

  1. DanRilley

    Thread Starter Senior Member

    Jan 13, 2008
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    Hi, I am building a tap-tempo device where you tap at specified intervals and it sets a pulse. The electronics are all worked out, but I'm having trouble finding a good switch that feels natural and soft. Does anyone have any suggestions. I wanted to make it similar to a drum pad, so it would be a rubber square about 1.5"x1" and then under it a button that will take anything from a soft to a hard tap from anywhere on the pad. The only buttons I've ever installed have just been, drill a hold and stick it in, so I'm wondering how this square button style can be executed as well as a good part reference.

    Thanks.
    Dan
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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    If the actual force of the tap does not matter, then a microswitch under a diaphragm would probably do. one with a lever can be loaded to operate with little force applied.

    If you need intensity, then a piezo force sensor is the way to go.
     
  3. DanRilley

    Thread Starter Senior Member

    Jan 13, 2008
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    hey thanks for the reply. I figured something like a cover would work, however I searched diaphragm on Mouser and couldn't find anything. Do the switch diaphragms go by a different name?
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
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    Any membrane stretched over a frame will do. "Diaphragm" is kind of a generic term. Heavy plastic film, goatskin, Naugahide, anything like that.
     
  5. thingmaker3

    Retired Moderator

    May 16, 2005
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  6. DanRilley

    Thread Starter Senior Member

    Jan 13, 2008
    107
    0
    Hey, thanks for the suggestions, I ended up using a Piezo sensor from radio shack. You can tap on it and it will generate a voltage and act as a switch. They're pretty cool and they're about an inch across so good surface area.
     
  7. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    You might want to use a Zener diode to limit the output voltage of the piezo sensor; it might produce a high enough voltage to zap the input of whatever you're feeding if you tap it hard enough.
     
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