Random Red-Green Light Circuit

Discussion in 'The Projects Forum' started by ngn33r, Mar 8, 2006.

  1. ngn33r

    Thread Starter New Member

    Mar 8, 2006
    2
    0
    Hi,

    This is my first post. I'm trying to build a simple red-green light circuit found at some airports. All I need it to do is to turn on a red or green light at random when a button is pressed. I've taken some basic electronics courses and built simple circuits, but I don't want to get too complicated with this.

    Thanks for your help.
     
  2. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
    657
    If you take the circuit I designed here and substitute a switch for the oscillator, it should do what you want. Connect one side of the switch where the oscillator was connected, and the other side to GND. Add a 2.2k pullup resistor from the switch to +9V. You might get some switch bounce, but it shouldn't matter. If it's a problem (maybe when you release the switch), let me know here and I'll show you how to fix it.
     
  3. windoze killa

    AAC Fanatic!

    Feb 23, 2006
    605
    24
    Good circuit. I might use this one myself.

    But what random Red/Green lights at the airports?? I have never seen them or at least noticed them.
     
  4. ngn33r

    Thread Starter New Member

    Mar 8, 2006
    2
    0

    Thanks for the help Ron, i'll let you know if i need more guidance.
     
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