momentary switch help

Discussion in 'The Projects Forum' started by nycjay01, Jul 22, 2015.

  1. nycjay01

    Thread Starter New Member

    Jul 22, 2015
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    Hi Everyone,

    I've got a simple project that I am working on just for fun. I am a track coach and I am looking for a way to wire a LED light to a momentary switch? I am looking for my athletes to push down on a button connected to a LED light. When the button is released I want the light to turn on. Can someone direct my to any sites that might have these types of switches. I am looking to maybe screw the "touch pad to a small piece of plywood then run wires to a battery powered LED light on a stand.
     
  2. ScottWang

    Moderator

    Aug 23, 2012
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  3. crutschow

    Expert

    Mar 14, 2008
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    Scott, is your post an eye test for us? ;)
     
    ebeowulf17 likes this.
  4. ScottWang

    Moderator

    Aug 23, 2012
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    I'm not sure what do you mean?
    Did you mean the color of linking line?
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
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    If you need a mom P.B. switch that operates only on release you may need more than just a common switch, a relay or other circuit means of latching.
    You most likely will need a reset also?
    Max.
     
  6. ian field

    Distinguished Member

    Oct 27, 2012
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    Sometimes one of the push buttons on the front panel of a PC is a non-latching changeover - sometimes even 2 pole.

    It can be a push to make or a push to break, depending how you wire it.
     
  7. MaxHeadRoom

    Expert

    Jul 18, 2013
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    I realise that, The OP mentioned LED illumination After release of the PB.
    Max.
     
  8. crutschow

    Expert

    Mar 14, 2008
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    The size of the font.
     
  9. ian field

    Distinguished Member

    Oct 27, 2012
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    The TS didn't mention anything latching - just an athlete pressing down on a button till they set off.

    A push to break would accomplish that.
     
  10. ian field

    Distinguished Member

    Oct 27, 2012
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    If it was that bad. I'd have had to go get my glasses.
     
  11. ScottWang

    Moderator

    Aug 23, 2012
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    In my computer and use smartphone to see and they are quite normal, font size = 1, could you take a screenshot, thanks.
     
  12. MaxHeadRoom

    Expert

    Jul 18, 2013
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    He mentions the LED being turned on on release, latched or not is not mentioned, if momentary, how long???
    I don't see 'On until he sets off'?
    Max.
     
  13. MaxHeadRoom

    Expert

    Jul 18, 2013
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  14. nycjay01

    Thread Starter New Member

    Jul 22, 2015
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    Hi max I am looking for the light to be turned on until the button is released.

    I'll look at the buttons suggested here my only concern would be that Led light are slow to turn on and I was hoping the button/light combo would be as fast as a regular light. I'm looking to put a light on a tripod so I can start my timer from a distance by waiting for the light
     
  15. ScottWang

    Moderator

    Aug 23, 2012
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    If the Led light are slow to turn on, that is the fade in function, you can choose a switch combined with the led, but they must be turn on very quickly, and the fade in function needs a circuit to complete it.
     
  16. ScottWang

    Moderator

    Aug 23, 2012
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    Is that looks better?
    I went to check the setup of my chrome, it seems the smallest font make me can't see the true font size.
     
  17. crutschow

    Expert

    Mar 14, 2008
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    Yes, now the font size looks normal.
     
  18. ian field

    Distinguished Member

    Oct 27, 2012
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    LEDs light instantly - EPE magazine published a project for faster on car brake lights - first part of that was LEDs light quicker than the thermal inertia of a bulb filament. The other part of the trick was detecting when the foot was lifted off the accelerator - that was the biggest part of eliminating the delay, but the quickness of LEDs was still a significant part of it.

    Some types of opto-coupler can work as fast as hundreds of kilocycles, slow by pulse transmission standards - but much faster than the eye can see.
     
  19. ScottWang

    Moderator

    Aug 23, 2012
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    What you said does any connection to what the TS needs?
     
  20. ebeowulf17

    Active Member

    Aug 12, 2014
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    The TS was concerned about how quickly LEDs would turn on compared to other lights:
     
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