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Flashlight Project Help

Discussion in 'LEDs and Optoelectronics' started by MythMaker, Apr 22, 2016.

  1. MythMaker

    MythMaker

    2
    0
    Apr 22, 2016
    Hey everyone,

    I am working on a project with an LED Flashlight and could use assistance in designing a circuit that would do the following.

    Flashlight is powered by 3 AAA batteries, the circuit needs be low-power.

    The flashlight consist of 3 LED light bulbs and I am replacing one with an IR receiver.

    The flashlight needs to remain on until the IR receiver detects an infra red signal (just signal, no pattern required). Once it detects an IR signal it needs to turn off the flashlight for X number of seconds (say 10 to 30 seconds) and then the flash light magically turns back on.

    I am sure I need a 555 timer for this circuit, but beyond that I am not sure how the circuit would be designed. Any and all help would be appreciated.

    This is going to be used in a haunted house that is done as a fundraiser.

    Thanks in advance!
     
  2. dorke

    dorke

    2,342
    664
    Jun 20, 2015
    WEcome to EP.
    Do you already have the IR receiver or need to get one?

    It is a simple circuit.
    you can use a 555 to create a single shot "off pulse".
    The trigger may be the IR receiver itself.

    555-Timer-Monostable-one-shot-Circuit.png
     
  3. MythMaker

    MythMaker

    2
    0
    Apr 22, 2016
    Was planning on using an IR detector transistor: NPN transistor that is biased by incoming IR light.
     
  4. dorke

    dorke

    2,342
    664
    Jun 20, 2015
    O.K fine replace the IR module with this :
    IR module.PNG
     
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