Hi Guys - new to this forum and hope you can help.
I have a piezo resistive pressure sensor RS286-664 connected to an LM358 used as a pair voltage follwers and supplying an LM392 configured as a differential amp (with gain of 150) to relate the output to ground.
The comparator section is part of an alarm system when the pressure rises/falls. Its a 12v single sided supply.
The problem is the LM358 keeps failing? And always in the middle of the night!
I cannot see why but wonder if the supply may be erratic as sometimes the alarm flutters. Would a varying Vs cause a problem and how much variation does it need to be or not to be?
And do you have a way to smooth the supply if that is of course the problem.
Thanks Quantised
I have a piezo resistive pressure sensor RS286-664 connected to an LM358 used as a pair voltage follwers and supplying an LM392 configured as a differential amp (with gain of 150) to relate the output to ground.
The comparator section is part of an alarm system when the pressure rises/falls. Its a 12v single sided supply.
The problem is the LM358 keeps failing? And always in the middle of the night!
I cannot see why but wonder if the supply may be erratic as sometimes the alarm flutters. Would a varying Vs cause a problem and how much variation does it need to be or not to be?
And do you have a way to smooth the supply if that is of course the problem.
Thanks Quantised