generate signal from push button

Discussion in 'General Electronics Chat' started by collyd21, Nov 22, 2013.

  1. collyd21

    Thread Starter New Member

    Jul 2, 2012
    14
    2
    hi, is it possible for a signal to be generated from the motion of actually pressing a button in without any sort of voltage supplied to the button itself?
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
    1,066
    Sure, use the button to push on a piezoelectric crystal, like one of these
     
  3. inwo

    Well-Known Member

    Nov 7, 2013
    2,433
    315
    I believe so.

    Any details?
     
  4. BobTPH

    Active Member

    Jun 5, 2013
    782
    114
    Yes, focus a camera on the button and then use image processing to determine if it has been pushed.

    Bob
     
  5. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,773
    1,103
    Finger pushes microswitch lever which pushes button and actuates switch.
     
  6. MrChips

    Moderator

    Oct 2, 2009
    12,421
    3,357
    Are you asking how to connect a push-button to your circuit?
    We generally use a pull-up resistor.
     
  7. wayneh

    Expert

    Sep 9, 2010
    12,093
    3,031
    Maybe one of these.
    [​IMG]
     
  8. inwo

    Well-Known Member

    Nov 7, 2013
    2,433
    315
    I was thinking on of these........................
     
  9. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    These are piezo powered traditionally. A large hammer is released on a piezo crystal via a spring mechanism, creates a high voltage pulse, and the spark will detonate the dynamite.

    Your local DIY store may not have them.
     
  10. gootee

    Senior Member

    Apr 24, 2007
    447
    50
    You could also have the button push cause a small generator to rotate.
     
Loading...