Vibration activates led

Discussion in 'The Projects Forum' started by susannah, May 30, 2013.

  1. susannah

    Thread Starter Active Member

    Feb 14, 2010
    87
    0
    I would like to automatically turn led on (and keep it on) when vibration is detected. Vibration comes from gadget which has vibration motor. How i can do that? Thanks!
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,153
    3,059
    Why not just measure the voltage going to the power terminals of the motor? A comparator would work great for that.

    You might be able to arrange a wire that would make contact with the rotating part, if it has one.

    An accelerometer mounted near the vibration would certainly pick it up. Or even a microphone, I suppose.
     
  3. Dodgydave

    Distinguished Member

    Jun 22, 2012
    5,000
    745
    You could use a Piezo speaker to detect the vibration, and feed it into a 555 chip.
     
  4. susannah

    Thread Starter Active Member

    Feb 14, 2010
    87
    0
    Thanks, this looks promising.

    I have "555 Timer Sparkfun COM-09273". Can i use it?

    There is 2 resistors in top left. Are these 470R?

    What LED resistor value should i use?

    Thanks
     
  5. edwardholmes91

    Member

    Feb 25, 2013
    186
    19
    I was going to suggest the same thing Dodgydave, a piezo element and a 555 timer.
     
  6. circuitfella11

    Member

    May 10, 2013
    56
    5
    if the typical LED's, you can use 100k resistors.. if not, refer it to the input that you will use and the LED's capacity..
     
  7. susannah

    Thread Starter Active Member

    Feb 14, 2010
    87
    0
    Can i use fancy piezo like this and can it be used without Arduino?

    Grove - Piezo Vibration Sensor Seeedstudio SEN04031P
    http://www.seeedstudio.com/depot/grove-piezo-vibration-sensor-p-1411.html?cPath=25_26

    My second choice would be

    Piezo Disk Vibration Sensor DFRobot DFR0052
    http://www.dfrobot.com/index.php?route=product/product&filter_name=piezo&product_id=399

    or

    Piezo Vibration Sensor - Small Horizontal Sparkfun SEN-09198
    https://www.sparkfun.com/products/9198

    or do i need to use just plain element like this:

    Piezo Element Sparkfun SEN-10293
    https://www.sparkfun.com/products/10293
     
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