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"notsohot" project - mains power cycler for heating appliances

  1. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,264
    Nov 28, 2011
    KrisBlueNZ submitted a new Showcase Item:

    "notsohot" project - mains power cycler for heating appliances

    Read more about this showcase item here...
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    8,797
    1,723
    Nov 17, 2011
    Kris, I'd love to see a few words of caution to potential tinkerers who might want to build this circuit as this circuit is connected to mains and not everybody will understand what you mean by "double isolation" and what a "fusible" resistor is.
     
    davenn likes this.
  3. Arouse1973

    Arouse1973 Adam

    5,162
    1,077
    Dec 18, 2013
    Looks an interesting circuit Kris. What's the reasoning behind the type of quadrant switching you have used for the Triac? Is it so there is no mains output until you have a load connected and this will also commutate the opto Triac driver. I have never seen it done this way before so just curious. I am also guessing you don't need a snubber circuit then?
    Adam
     
  4. FvnnyL3tt3r1ng

    FvnnyL3tt3r1ng

    23
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    Feb 26, 2015
    Interesting circuit Kris. An old boss of mine had designed a simple circuit to power his water heater's recirculating pump by a momentary push button which was set via a "single-shot" relay whose time was also set with a potentiometer. The button was mounted in his bathroom and was set for 15 minutes. He estimated it to save him a very significant amount of money in utility costs.

    @KrisBlueNZ
     
  5. KJ6EAD

    KJ6EAD

    1,114
    157
    Aug 13, 2011
    I don't see the customary notation that C1 be mains rated nor any resistor wattages.
     
  6. Tha fios agaibh

    Tha fios agaibh

    1,809
    580
    Aug 11, 2014
    Nice circuit ChrisBlueNZ, seems like a great way to save power and add some temperature control for resistive loads.

    I wonder if you have plans for this, or just something your tinkering with.
    It probably would not fly as a stand alone "appliance power cycler", because you'd never get UL, EU or another nrtl to ok something like this for widespread use. People would be plugging in appliances not capable of handling other than "mains" (or "line" as we call it in USA) power and creating potential hazards.
    But, it could be suitable as an individual device that could be patented, with the goal of supplying manufactures, who in turn would use it in their appliances. They would be responsible for getting their appliance listed, not you.
     
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