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mini project low voltage protection system using annunciator

Discussion in 'Electronics Homework Help' started by archanapurvi, Feb 4, 2013.

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  1. archanapurvi


    Feb 4, 2013
    Hi in our college for our first year mini project , we were given a problem statement and based on it we have to find a solution , but i am not able to ,so here is the problem statement
    "low voltage protection system using annunciator
    generate 5volt power supply from 230volt ac and activate beeper when
    power supply is below 180volt.choose components with appropriate
    materials.list the important property based on which the material is
    chosen for the components .draw the waveforms of current and voltage
    at specific branches and node.find the laplace transformations ."
    so if any one does come across some ideas please help i have my first review coming by so reply ASAP guys
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    This is homework, so I moved the thread into this section.

    "generate 5volt power supply from 230volt ac" Google "5v power supply circuit".
    "activate beeper when power supply is below 180volt" I assume you are going to use a transformer based circuit. What is the transformer's secondary voltage if the primary voltage drops from 240V to 180V? use that information and a comparator circuit to activate the beeper.
    Last edited by a moderator: Feb 4, 2013
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