about the power supply

Discussion in 'Homework Help' started by connie, Mar 27, 2009.

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  1. connie

    Thread Starter New Member

    Mar 27, 2009
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    I would like ask what is the basic function of the compoent in the dashed box as shown in the diagram, and I have attached a file.
    Thanks for all of you. Please help.
     
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