Timer relay set start date

Discussion in 'General Electronics Chat' started by carto, Feb 3, 2014.

  1. carto

    Thread Starter New Member

    Feb 3, 2014
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    Hi folks, I have searched around and am surprised I can't find a product like this. Maybe I'm just don't have the right search words.

    I have a time-lapse camera system that I use for a remote location. I wish to set, two months in advance, a date for the 12 V power to switch on. While waiting the relay must use as little power as possible.

    That's it! Anyone know of a product like this?

    Thanks!

    --Carto
     
  2. #12

    Expert

    Nov 30, 2010
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    Design one out of CMOS timer chips like a CD4020. They use little tiny amps while they are waiting.
     
  3. carto

    Thread Starter New Member

    Feb 3, 2014
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    Great; I'll look into that. Thanks!
     
  4. KMoffett

    AAC Fanatic!

    Dec 19, 2007
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    How accurate does the start week?/day?/hour?/minute?/second? need to be? An small microcontroller in a sleep mode and RTC (real time clock) chip.

    Ken
     
  5. carto

    Thread Starter New Member

    Feb 3, 2014
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    Ken,

    Thanks very much for the reply; I guess I need to activate my "email notification when reply" setting so I respond sooner.

    The accuracy and precision of the start doesn't need to be better than a few days. I mostly just need to delay for a couple of months the day that the camera's controller starts the time-lapse sequence. Once that starts I can get the real time from the image files.

    I will search on the topics you've given me and see what I can come up with. I am a complete beginner at building circuit boards.

    --Arthur
     
  6. ScottWang

    Moderator

    Aug 23, 2012
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  7. KMoffett

    AAC Fanatic!

    Dec 19, 2007
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    I would go with a PICAXE 08M2 microcontroller and a DS1307 real-time-clock. The PICAXE can be in a low current SLEEP mode most of the time and wake up once a day to check the RTC's month/day. Then the PICAXE, with a relay or MOSFET, can switch on your 12V supply when the set month/day is exceeded.

    Ken
     
  8. carto

    Thread Starter New Member

    Feb 3, 2014
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    #12, Scott, and Ken--

    Thanks very much for your replies and help. Since I am such a beginner on this, I am going to try it this way--ordering a PICAXE 08M2 starter kit, a DS1307 clock, and a RB-See-286 Grove MOSFET module. It looks like that will get me going, and hopefully I'll learn whether this is the way to go for all 12 of the systems I have.

    --Carto
     
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