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Geyser Timer

  1. Nov 15, 2008 #1
    I want to build a digital timer that will switch my geyser on and off at a preset time in order to save power. I don’t know much about PICs so I would rather try using only logic ICs. It has to have at least 3 preset ‘on-times’ and 3 ‘off-times’. Can anyone help me to get started?
  2. jcsd
  3. Nov 15, 2008 #2
    seriously, just go to the hardware store and pick up an AC wall timer. something like this:
    http://www.drillspot.com/pimages/65/6526_300.jpg [Broken]

    maybe get a "heavy duty" unit, while you're at it. don't know how much power a "geyser" uses.
    Last edited by a moderator: May 3, 2017
  4. Nov 15, 2008 #3
    Unfortunately it would be illegal to build something like that into a distribution board in South-Africa. Plus an average geyser is 4000W – 6000W, so I don’t think even a heavy-duty unit would work.

    This is an example of something similar: http://www.geyserwise.co.za/web/index.php" [Broken]
    Last edited by a moderator: May 3, 2017
  5. Nov 15, 2008 #4
    a "geyser" is a hot water heater?

    there are also timers that control a lot more current and could be inserted into an electrical panel. what i don't get is how it's going to be any more legal for you to insert some homemade controller into a panel. if that's your goal, you'll need to buy an approved product.
  6. Nov 16, 2008 #5
    Yes, a ‘geyser’ is a hot water heater.
    This whole exercise is not to build something that will necessarily be used. I just want to learn something out of this about logic-ICs, so buying a pre-built unit would be pretty useless.
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