State Machine for Railway-Crossing Indicator. I don't get it.

Discussion in 'The Projects Forum' started by brightjoey, Jun 19, 2010.

  1. brightjoey

    Thread Starter New Member

    Nov 12, 2009
    14
    0
    1st of all I wanna thank you for taking your time to read this post. I know there are many other busy important things that you may have, So once again I want to thank you for giving this thread your attention. :D All of them using LED's as output.

    5 outputs
    1) Area 1
    2) Area 2
    3) Area 3
    4) Flashing Light
    5) Warning Bell
    [​IMG]

    Area 1 & Area 3
    Flashing Light and Warning Bell Will be turned on when trains enter from either side.
    Flashing light will flash for 3 seconds.
    Waring bell will turn on for 5 seconds.
    Area 1 or Area 3 lights up depending on wher the train is.

    Area 2.
    Area 2 light on.

    No Train
    All outputs are off.

    Tips
    Use counters to keep track of time for flashing light and warning bell.


    Haha I still don't understand. Is there any reading material on where to begin?
     
  2. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
    How are you sensing the train?

    Are you using a microswitch, or hall effect sensor? Even a light-beam-break sensor?

    After you get the input from the switch, you can signal the flasher / alarm circuit.

    Break down the problem.

    Get yourself a circuit that will flash your LEDs for 3 seconds and your audio alarm for 5 seconds.

    Once done, use your triggering switch to activate it.
     
  3. brightjoey

    Thread Starter New Member

    Nov 12, 2009
    14
    0
    I'll be using normal switches to represent the sensors. The problem is How do I design my circuit so that when 1 switch is on, the flashing light and warning bell will flash 3 sec and 5 sec respectively?
     
  4. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    Just start the two timers by the switch and let them do their job.
     
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