Electonic Circuit Timer/counter

Discussion in 'The Projects Forum' started by ruddandy, Dec 27, 2006.

  1. ruddandy

    Thread Starter New Member

    Dec 27, 2006
    2
    0
    hi all!
    wonder if you can help me, im making a model for my project. it is a deep vein thrombosis prevention aid. it works like a pedometer however if you do not move enough it gives an output (vibration) to alert you. it must run off a battery. have a movement sensor. count 10 moves then reset both counter and timer. a timer to count up to 20 mins (if this is reached before 10 moves are counter then the output is triggered)

    any help will be greatly appreciated
    andrew:)
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Hi,

    If you are interested in a model, and not an actual device, perhaps the format for the model could be specified?
     
  3. ruddandy

    Thread Starter New Member

    Dec 27, 2006
    2
    0
    as it is a model i have decided to simplify the idea to show the general idea.

    therefore i now just need a simple timer circuit using a 555timer that after 3 minutes will sound a buzzer. however if the circuit is moved before the 3 mins has elapsed (ie using a tiltswitch or somother kind of movement sensor) the timer will reset and start again.


    thanks
    andrew
    any help appreciated... :rolleyes: i am a novice!
     
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