555 weird one shot question

Discussion in 'The Projects Forum' started by Gate5, May 29, 2016.

  1. Gate5

    Thread Starter New Member

    May 29, 2016
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    Ok hi all I won't might light to stay on as long as the switch is on but when switch is off then start the one shot timer to turn off light in like 2 min could someone like point me to a diagram of 555 pins for that thanks
     
  2. tracecom

    AAC Fanatic!

    Apr 16, 2010
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    1,393
    Ok, hi all. I want my light to stay on as long as the switch is on but when switch is off, then start the one shot timer to turn off light in approximately 2 minutes. Could someone point me to a schematic diagram of a 555 circuit that does that? Thanks.

    Is that what you need?
     
  3. Dodgydave

    Distinguished Member

    Jun 22, 2012
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  4. Gate5

    Thread Starter New Member

    May 29, 2016
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    Ok want to turn on head lights when ignition switch is on want 555 timer to control 2 min delay when ign switch is off make my old truck like my new car the problem is the 555 timer is so versatile (witch is good) it's acting different then what I want please note I'm not great at electronics just really light to play with them thanks
     
  5. Gate5

    Thread Starter New Member

    May 29, 2016
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  6. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    If you need to start the timer when the ignition is off, you will need a npn transistor to pull the trigger pin low.
     
  7. Gate5

    Thread Starter New Member

    May 29, 2016
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    Thank you Dodgydave sorry for late reply had company
     
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