Electronics

Discussion in 'The Projects Forum' started by kis, Nov 19, 2014.

  1. kis

    Thread Starter New Member

    Nov 17, 2014
    6
    0
    Dear friends,
    i am trying to make circuit that should make the light on for 6hours and then it should off the light. This process should repeat for every 24 hours... i dont know which type of controller i used choose for this project or any other option is there to make this circuit without microcontrollers...
    thanks in advance :)
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,986
    745
    yes use a plug in timer, 24 hr mechanical or digital type from any electrical store.
     
  3. kis

    Thread Starter New Member

    Nov 17, 2014
    6
    0
    can you please send any circuit for my project
     
  4. wayneh

    Expert

    Sep 9, 2010
    12,123
    3,047
    You can buy a full-featured and safe one for less than $5. Why would you build one?
     
  5. kis

    Thread Starter New Member

    Nov 17, 2014
    6
    0
    To get some knowldge
     
  6. wayneh

    Expert

    Sep 9, 2010
    12,123
    3,047
    Well, one piece of knowledge for this particular project would be that a micro controller would make it easier. The typical 555 timer circuit is more complicated when long times are required. You can work with that, but the other problem is precision. A 555-based timer will not do well in timing compared to a quartz clock, or even to a mechanical clock.

    What timing precision would you like to achieve?
     
  7. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,172
    397
    How do you wish to power ckt.? Can you build a ckt. similar to " simple LED with delayed start" by miha_s
     
  8. DickCappels

    Moderator

    Aug 21, 2008
    2,653
    632
    This circuit turns on a drip watering system for half an hour every 24.055 hours, using a 32768 watch crystal for the timebase. It might be a good start for your project. You can make the "on" time longer by "nanding" later stages in the CD4040 ripple counters.

    [​IMG]

    The details of the project are at
    http://www.cappels.org/dproj/garden_timer/Garden_timer.html
     
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