Hi,
I am trying to build a circuit for detecting infrared radiation using a thermopile. I have a schematic of a circuit but I'm unsure of what it does. (see attachment file)All that I want to do is measure the voltage output of the thermopile. How do I measure the voltage output? I am presuming that the OP297's are there to add gain but i'm unsure why the LM358's are there. I tried building the circuit but in place of the OP297's I used LM324's. The circuit didn't work. Would the LM324's have made the difference between it working and not working? Is there any simpler circuit I could implement to see if the thermopile is actually working? I am really stuck with this as its part of my final year project in university and its due in soon.
Thanks for any help.
Ruairí
I am trying to build a circuit for detecting infrared radiation using a thermopile. I have a schematic of a circuit but I'm unsure of what it does. (see attachment file)All that I want to do is measure the voltage output of the thermopile. How do I measure the voltage output? I am presuming that the OP297's are there to add gain but i'm unsure why the LM358's are there. I tried building the circuit but in place of the OP297's I used LM324's. The circuit didn't work. Would the LM324's have made the difference between it working and not working? Is there any simpler circuit I could implement to see if the thermopile is actually working? I am really stuck with this as its part of my final year project in university and its due in soon.
Thanks for any help.
Ruairí