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Comparator circuit design needed

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asimzia

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I am using 2 stage amplified load cell signal. First amplification from AD624 and then from non-inverting op amp. Now i need to compare it with a threshold.
But the problem is that when i give amplified output into the comparator, the change in weight on load cell does not affect the output of amplifier rather it remains constant.
Why it happens ?
 

loadcell.jpg

This is the circuit diagram
thanx Keith
 

From that diagram the first problem I see is that your pin numbers of the 741s don't make sense and the power on the second one is only 5V whereas you are comparing it with a voltage close to 10V... and the power supply pins are reversed on the second 741 compared to the first (but neither seem correct - there aren't 11 pins on a 741).

Keith.
 

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