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How to set value of preset nd how I get proper value of OPAMP

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nitinpatil

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Hello Friends,

I have problem with preset in my ckt, that I design in proteus,
actually I want the output of this 2 opamp should be zero, so I connect this LED so that they should blink when the output of opamp is zero,

Actual concept of my ckt is that, 1st opamp give zero o/p when voltage become high (i.e greater that 300),
nd 2nd of give o/p zero when voltage become low (i/e/ lower than 180), otherwise they both should be high

This is bcoz I want to protect the single phase motor from the fluctuation of main supply,
so i set the values for high and low voltage, means motor run only in between this voltage otherwise it off,

I attach the proteus ckt diagram for understanding
Untitled.jpg
For more detail follow this link
https://www.edaboard.com/threads/291297/

So please help me for getting proper output of this ckt, m confuse that how to set value for preset in proteus, for perfect calibration,


Thank you to all,
Nitin
 

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