Connect with us

Sound detected countdown timer?

Discussion in 'General Electronics Discussion' started by melk76, Jan 27, 2011.

Scroll to continue with content
  1. melk76


    Jan 27, 2011
    Hi guys, I'm trying to create a project that when activated by a sound, starts a countdown and then sounds an alarm (about 5 mins - pulsating one using a 555 timer) and can repeat.

    Or, if the time delay can decrease (between each alarm) after each run. Ie -

    Sound detected, Countdown starts, Alarm sounds, (back to countdown start, if possible 'take 1 min' )

    Thanks so much for any help!! I'm so confused lol, I've realy got no idea about values etc. So I'd be SO grateful for any help!! All the best,:D:)

    (I've added a block chart for it if it helps :) )

    Attached Files:

    Last edited: Jan 27, 2011
  2. davenn

    davenn Moderator

    Sep 5, 2009
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day