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  1. #1
    Senior Member Flame*Angel's Avatar
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    specialized digital timer for constant feeder

    Anyone know of a digital timer that has up to 14 on and off settings but, more importantly, can be set to be on for very small periods of time, like about 15 seconds?

    I'm trying to design a simple, cost-effective constant feeder for frozen foods. Something that feeds the tank once an hour for 15 seconds while the lights are on.
    Susan

  2. #2
    Senior Member volitan's Avatar
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    Derik...

  3. #3
    Senior Member tang_man_montreal's Avatar
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    Volitan,
    No good...

    Minimum setting interval of 1 minute


    Susan,
    Not even the digital Intermatic timers that I use on some applications have a small interval setting as you require.
    The only way you could do this is with X10 as far as I know.
    I could easily do it with my Aquacontroller.
    I am Homer of BORG... Prepare to be..OOOO!! DONUT!!!!!!

  4. #4
    Senior Member volitan's Avatar
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    thats the smallest iinterval i have seen yet...looks like
    Susan is getting an aquacontroller
    Derik...

  5. #5
    Senior Member AndrewNS's Avatar
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    I have been using Intermatic timers that I got from Home Depot. They may have this model from there web site...
    http://www.intermatic.com/?action=prod&pid=213

    14 ON/14 OFF setting per day and it's digital.

    Andrew

  6. #6
    Senior Member tang_man_montreal's Avatar
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    Andrew,
    Unfortunately, the Intermatic timers don't allow for an interval smaller than 1 minute.
    I am Homer of BORG... Prepare to be..OOOO!! DONUT!!!!!!

  7. #7
    Senior Member tang_man_montreal's Avatar
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    On 2nd thought, I wouldn't even suggest the Aquacontroller for a small interval like 15 seconds. While it can easily be programmed to with a 15 second interval, it sometimes takes up to 1 minute for a command to be received by an X10 appliance module.

    It could be done using an Aquacontroller Digital connection, such as a DC4 (Neptune Direct Connect), however we're talking major money there.
    I am Homer of BORG... Prepare to be..OOOO!! DONUT!!!!!!

  8. #8
    Senior Member Kenzy's Avatar
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    Susan is it possible to use a smaller/slower pump or dilute the food source so that a 1 minute on time would work?

  9. #9
    Senior Member aragorn69's Avatar
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    I use to use X10 units but will never use them again, they are loud, unreliable and very buggy, every once and a while my main lighting would turn on at 1am ish and some times things would not turn off. They may be fine if only running 1 or 2 appliance units but I was running 9 and it didn't work out all that well.
    Susan, maybe try talking to some one into electrons and get them to build you a small unit that when turned off will automatically turn off in 15 seconds or so then you could use one of the other timers.
    Adam

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  10. #10
    Moderator Krugar's Avatar
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    15 seconds is going to be hard to time any way you slice it. If you want to use digital timers the only thing I can think of would be to get 2 timers. Warning, this will be hard to set up & keep set up:

    1st Timer has a power bar plugged into it & turns on for 1 minute.

    2nd Timer is plugged into the power bar.

    Set it up so that time 1 turns on at 1pm and timer 2 turns off at 1pm.

    Now the tricky part:

    Set thier clocks 15 seconds apart. Timer1 should be 15seconds faster than timer2.

    It's ugly as all heck, but that's all I can think of.

    I'd look for an on/off serial controller & hook it up to an old computer or buy a controller as suggested to be honest.

    Cheers!
    There is nothing so permanent as a temporary measure.

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