LED Circuit

Discussion in 'The Projects Forum' started by colaboy, Nov 26, 2008.

  1. colaboy

    Thread Starter New Member

    Oct 17, 2008
    Hi, I need some help please.
    I need a circuit that when a switch is pressed, will light 3 red LEds for 5 seconds then turn off the red LEDs and light 3 green LEDs. These would stay lit until either the same switch or a second switch is pressed (the second switch is optional but could be used if it would make it easier).
    Then the green Leds would turn off and the reds would light for 5 seconds then go out.
    Anybody follow that?:confused:
    I'm a relative novice but if pushed I can just about follow a circuit diagram.
    Thanks in advance for any help.

  2. SgtWookie


    Jul 17, 2007
    Is it OK if the green LEDs are on to start with?

    It's pretty easy to make a circuit that when one pushes a button, the green LEDs will turn off and a set of red LEDs will turn on for 5 seconds, then turn off, and the green LEDs turn on again.

    Is that what you want?
  3. Søren

    Senior Member

    Sep 2, 2006

    This should do:
  4. colaboy

    Thread Starter New Member

    Oct 17, 2008
    Hi and first things first, thanks both of you for your help.
    Sgt Wookie
    Do you mean the green lights will come on again on their own?
    If so, then no that won't do it.
    The circuit is to simulate the landing gear lights on an aircraft.
    When the landing gear is down, the lights are green.
    When the landing gear is moving into the up or down position, the lights are red (approx 5 secs).
    When the landing gear is up and locked the lights are off.
    So the lights need to be either off or green, red is a kind of transition state.
    Hope that makes sense?

    I would love to be able to say, Wow that's exactly what i'm looking for.
    But just looking at the drawing means nothing to me.
    I will attempt to build it and see what happens.
    However, I would like to thank you very much for the help.
    It really is appreciated.

    Thanks again both of you.