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bell project

Discussion in 'Electronic Basics' started by bro, Dec 7, 2004.

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  1. bro

    bro Guest

    Its for when a timer runs out and a relay turns off a light, I would
    like a bell to ring at the same time. IT can either ring when one side
    of the relay turns on or the other side turns off. It should be twelve
    volts. Something other than a door bell, I've tried them and they
    don't last more than a couple of months.
  2. CFoley1064

    CFoley1064 Guest

    Subject: bell project
    Good morning. If you could be a little more descriptive, you might get a
    better response.

    I would guess from what you've said that you've got something like an
    Intermatic light timer switching line voltage for the lights, and you want a
    bell indication when the lights go off. You hooked up a bell transformer to
    the other side of the switch, and that gives you the "binnng" of the doorbell
    when the lights go off. If that's not it, try again with some more

    But if it is, you might want to ask yourself, "where's the 'bonnng?' " (no
    humor, please) While bell transformers are made for continuous duty, the
    solenoid driving the doorbell itself isn't. The thing is probably overheating
    and eventually burning out, which is why you're getting poor results.

    What you need to complete your project is called an interval timer. When power
    is applied, the internal switch is closed for a preset interval, and then it
    turns off by itself and stays off as long as power is on. If you're just
    driving a bell transformer, you can get a small solid state interval timer and
    mount it in the Intermatic box. They cost a lot less than the standard
    interval timer relays, and are also smaller. The output can go to your bell
    transformer and doorbell.

    One good choice for this is McMaster-Carr P/N 7457K65, which is available for
    $22.19 USD.

    You'll also have to use a pot or fixed resistor to set the time delay. Ask for
    the 0.5 to 5 second model. This way, you can go with what you've got.

    Of course, that might not be what you've got at all.

    O, well.

    Good luck
  3. bro

    bro Guest

    You're right I didn't give a good discription. Let me try again

    I have a twelve volt power supply that is hooked up to a power strip
    which is driven by a timer accumulator. When the timer runs out the
    power strip goes dead turning off the power supply and a couple of
    other things. The twelve volt power supply on the power strip is
    hooked up to a relay that it switches on and off or... from one relay
    to another.

    On one side of the relay I have another power supply that has a "in
    use" and a "vacant" light hooked up to one side. When the power strip
    goes on the relay is switched and the "in use" light goes on, when the
    power goes off the "vacant" light goes on.

    If you need to know, its for an adult oriented business.

    this is the relay

    1 and 2 twelve volt switcher

    1-positve 2-negative
    3-positive side of power supply 4-bell?
    5-in use light 6-bell
    7-vacant light 7-bell

    Using the side with the bell hooked up I can either have the bell go
    off when the circut is opened or closed.

    A couple of problems with the door bell is that electro mechanical ones
    burn out the magnet from being held on, with an electronic one if the
    bell is held on for a while it rings off and on. Bells are also made
    very cheaply and the ones that don't ring when held "on" just crap out
    over time too.
    I'm going to look into the part number you gave me, thanks.
  4. CFoley1064

    CFoley1064 Guest

    Subject: Re: bell project

    L1(Hot) L2(Neutral)
    | |
    | .-----------------. |
    | | | |
    | | Timer/ | |
    o--o Accumulator o-------------------o
    | | | |
    | '-----------------' |
    | In Use |
    | CRY1A .-. |
    | .------( X )-----------o
    | N.O. | '-' |
    | o------' |
    o------o--__ |
    | Common o------. Vacant |
    | N.C. | .-. |
    | '------( X )-----------o
    | '-' |
    | .------------o
    | CRY1B | |
    | '---. ,-----------.
    | o- )|( |
    o------o--__ .---------. )|( |
    | o----o SSR/ o-----' '------. |
    | N.C.| Interval| Bell | |
    | | Timer | Xfmr | |
    | | | .--o----o--.
    '---------' | |
    | Doorbell |

    From Power Strip

    L1(Hot) L2(Neutral)
    | |
    | .-------------------. |
    | | | |
    o---------o 12V DC Switching o----------o
    | | Power Supply | |
    | | | |
    | | + - | |
    | |
    .---------' '-----------.
    | RY1 |
    | ___ |
    | |
    | |

    created by Andy´s ASCII-Circuit v1.24.140803 Beta

    This should do the trick. If you have any questions, feel free to email.

    Good luck
  5. bro

    bro Guest

    OK, great. I'm going to print this out a puzzle through it.

    Just knowing about the part you suggested should do the trick. You
    were a lot of help, it helped me typing it out to conceptualize...
  6. Rich Grise

    Rich Grise Guest

    If it's for the actual doors, just arrange a microswitch with some kind of
    catwhisker to just close and open when the door opens and closes, like
    they do at stores. You don't need an electronic solution at all, if it's
    just for the doors. What you'd wind up with is a plain old ordinary run-
    of-the-mill, seen-one-seen-em-all, everybody's-got-one doorbell.

    Except that it dings when the door opens and dongs when the door closes.

    And once they're inside or outside the peepbooth, what difference does it
    make what they're watching? Isn't customer confidentiality one of the
    hallmarks of adult entertainment establishments?

    As for counting bodies in the booth, I'd go for something
    ultrasophisticated, like some kind of infrared sensor, but if you're going
    to do that, it's only good business to post a warning.

    Good Luck!
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