count down timer

Discussion in 'Homework Help' started by doodsettledown, Oct 7, 2008.

  1. doodsettledown

    Thread Starter New Member

    Oct 7, 2008
    ive got a project for school thats an option but its worth alot of extra credit. in multisim, i need to make a circuit that has a keypad with a 4-digit LCD display, a 0-9 keypad, and a switch. i need the circuit so that i can put in 4 digets in the keypad and they are banked up on the LCD. after pushing a momentary switch, the countdown starts (the lcd should be MM:SS wher m=minutes and s=seconds) after the count down is done, another switch is closed and a light goes on. ac or dc power works. thanks a million if you can do this for me.

    thanks again,
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    The Homework Help section asks that you post up the work you have done so we can see it and find where you went wrong, or suggest better approaches. We will not do all your work for you, no matter how little time is left before it must be submitted.

    If you are in doubt about how to structure your post and what to include please read this thread.

    Thank you.