Digital Countdown

Discussion in 'The Projects Forum' started by strokebow, Jul 15, 2008.

  1. strokebow

    Thread Starter Member

    Jan 26, 2008
    13
    1
    Hi,

    I am looking to build a digital timer for a gym.

    The basic requirements will be a digital display which will count down from a user specified variable value (eg, 2 mins). After the 2 mins is up the device will bleep and then starts to count down from 2 mins again.
    The device should also have a reset button which when pressed will begin the 2min countdown again.
    As stated before, the countdown time will be variable
    The device will also have a standard on/off button.

    Can anyone suggest an outline for such a project including what I will need.

    Please bear in mind, I am not an experienced project/practical guy but I do have basic understanding of electronics (theory).

    circuit diagrams and explanations and a list of equipment needed would be a great help


    Thanks :)
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    Funny you should mention that, I have digital stadium timer I was designing, the only section I breadboarded and tested was the countdown timer. I'll attach my drawing as soon as I find it.

    ***************

    Look at sheet 3. I didn't use the mux part in the breadboard.
     
    Last edited: Jul 15, 2008
  3. strokebow

    Thread Starter Member

    Jan 26, 2008
    13
    1
  4. ole_madame

    New Member

    Jul 31, 2008
    1
    0
    Wow, nice idea. Is this project with a view to making money?
     
  5. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    Is 2 and 3 minutes suitable for your needs? I might breadboard the rest of it sometime if I thought someone else was interested.

    I was thinking car horns for the buzzer, but that can be scaled back.
     
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