555 timer help

Discussion in 'The Projects Forum' started by Scott O., Feb 15, 2007.

  1. Scott O.

    Thread Starter New Member

    Feb 15, 2007
    2
    0
    I am trying to build a timer for a 12vdc motor. I would like it to turn on for 30 seconds, off for 30 then back on and off and on etc.

    Can anyone help me with that circuit? I am not a EE but I have a working knowledge of how to do this sort of thing usually. I am just having trouble with this one. Thanks in advance!

    Scott
     
  2. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    If you don't mind adding a 5V regulator to your design, I believe you may want to consider setting up your 555 timer (running on 5V) as a clock source that you will feed into a binary counter (running on 5V). The output of the binary counter could then feed a MOSFET driver to handle drive to your 12V motor.

    hgmjr
     
  3. Scott O.

    Thread Starter New Member

    Feb 15, 2007
    2
    0
    If you have a moment, could you sketch a potential schematic. Please understand I am not an expert by any means. Thanks
     
  4. Lubby

    New Member

    Feb 20, 2007
    6
    0
    Scott O.

    Check out Cana Kit, or simply google 555 timer, and you'll find some good sites with kits and descriptions of their possible functions. I think your looking for an 'astable' timer, or probably more likely a 'cyclic' timer. I've found a lot of info on these sites and others googled.

    All the best with it.

    Lubby
     
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