Timer What type is It? Please Help...

Discussion in 'General Electronics Chat' started by Paulcircuit, Jan 9, 2017.

  1. Paulcircuit

    Paulcircuit

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    Dear Electronics Professionals,

    I need only to know the name of the following ...... switch - timer... I am assuming to call it:

    The timer is between the power source and siren. As the 12volts pass thru it sounding off the siren the timer is activated and will automatically shut the current off in 10 minutes.

    A) What is that type of timer called????

    B) Any recommended site to purchase this timer...?

    Thank you all in advance..
    Paul
     
    Paulcircuit, Jan 9, 2017
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  2. Paulcircuit

    shrtrnd VIP Member

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    You may indeed have a timer, but what I think you probably have is called a:
    TDR, or Time Delay Relay. In your case, it would be a Delay-Off TDR.
    Can you tell us what the device is (make and model number) of your timer?
     
    shrtrnd, Jan 9, 2017
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  3. Paulcircuit

    Paulcircuit

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    I do not have the timer , I need to purchase one for that function that is activated when 12v current is applied.
    I am looking for the exact name to purchase it. Can you confirm please...thanks
     
    Paulcircuit, Jan 9, 2017
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  4. Paulcircuit

    Paulcircuit

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    Yes, Delay-Off TDR is just what I need, thank you very much
     
    Paulcircuit, Jan 9, 2017
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  5. Paulcircuit

    AnalogKid VIP Member

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    ebay, a programmable timer is around $10.

    ak
     
    AnalogKid, Jan 9, 2017
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  6. Paulcircuit

    shrtrnd VIP Member

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    There are a couple of things we need to know first. (You want an example of an exact part number)
    You will have a power source that activates the siren. Is that actuator a push-button you control, or a signal from some other device?
    What you will need to do, is connect that power source to the siren THROUGH contacts on the TDR, the siren will
    be connected to the other side of those (mated) relay 'normally open' contacts.
    HOWEVER
    The 'delay off' Time Delay Relay also requires it's own power source.
    Sometimes, if wired properly, one power source can run both the TDR and the Siren, but we don't know what you have available to you for power sources. (I know 12V runs your siren). What we need to determine is how your
    siren is presently wired-up. If everything is 12V, or if you've got some transformer from regular 120VAC wall socket power in the mix somewhere.
    ...Heck. I may even be barking up the wrong tree here.
    Is this for an automobile 12VDC siren? Like an auto alarm?
    Am I overthinking this?
    If this is for a vehicle, we'll have to be considering vibration-mounting concerns too.
     
    Last edited: Jan 9, 2017
    shrtrnd, Jan 9, 2017
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