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    Mari16's Avatar
    Mari16 Posts: 1, Reputation: 1
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    #1

    Apr 10, 2008, 06:41 PM
    Series circuits
    What things use series cicuits?
    Credendovidis's Avatar
    Credendovidis Posts: 1,593, Reputation: 66
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    #2

    Apr 10, 2008, 06:58 PM
    Quote Originally Posted by Mari16
    What things use series cicuits?
    Dear Mari :
    Mostly circuitry that responds to INTERRUPTING the existing wiring loop.
    Think for instance alarm systems and fire detection systems, where the continuity of the wiring is important, and checked by a constant current through the series circuitry involving all detectors. That way it is made sure that the circuitry is operational, and any real alarm is detectable.

    As always : if you require more info, please let me know. If this solves your problem, please rate the answer provided! Feed back is always appreciated!
    ;)
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #3

    Apr 10, 2008, 07:27 PM
    Credendovidis:

    Fire detection systems are not series circuits. They are most definitely parallel because any detector causes a fire alarm. They have "monitored contacts" so that there are really three states: shorted, open, and connected. The last detector in a loop typically has a resistor. This is how a break in the two wire circuit is detected.

    Alarm systems operate in much the same way.

    I suspect that this is a homework problem.
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