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You are here: Home / Topics / Door Bell Switch with Delay Between Reactiviation

Door Bell Switch with Delay Between Reactiviation

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Projects › Projects › Door Bell Switch with Delay Between Reactiviation

  • This topic has 1 reply, 2 voices, and was last updated 12 years, 5 months ago by AJISH ALFRED.
Viewing 2 posts - 1 through 2 (of 2 total)
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  • February 1, 2013 at 6:59 pm #2099
    David
    Participant

    Hi,

    I would like to install a door bell that my dog can use to request to enter or exit the house, but I do not want her to be able to ring the bell repeatedly (and drive the family crazy) if we are unable to open the door for her immediatly.  I would like to install a circuit that will permit her to ring the bell once, but then prevent the bell from ringing again for a period of time perhaps as long as a minute.  I anticipate using a standard doorbell transformer.

     

    Does what I need already exist, and if not, how can I build it?

     

    Thank you in advance,

    Dstphila

     

     

    February 2, 2013 at 6:27 pm #9089
    AJISH ALFRED
    Participant

    Hi David,

    Apply a mono-shot (mono-stable muti-vibrator) to the circuit and let your dog play with your dorbell.

    A monostable multivibrator is a circuit which can change its state (on to off or off to on) after a period of time once triggered and remains in that state.

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