I am only just starting to learn about circuits and electricity, so please bare with me.
Here are the parts used:
-Op Amp is the LM318 from TI
-Photodiode is the SFH 213 from Osram
-Power supply is 9 Volts 1 Amp
-My resistance is a bit higher, with 2 1 Megohm resistors
The issue is that I should be seeing a much higher voltage than what I am seeing, I get between .15 V when covered to .23 V when uncovered. From what I understand, the higher Rf is, the higher my voltage should go. But adding more resistors does almost nothing, it slightly increases the values. If I put a 100K ohms instead of a 1 Megohm, I get almost the same values.
I have tried to build every variation of the op amp mathematical functions but not one of them has worked correctly. I've also tried a few different kinds of transimpedance amplifiers to increase my photodiode signal but none of those have worked either. I also have swapped out my photodiode with other photodiodes and my op amp with other op amps. In my attempts I've already blown up a photodiode and an op amp.
I have been successful in building the circuits I want in QUCs simulation software, but none of that has translated to the board.
With all of that in mind, I figure it means that my understanding of ground is wrong, my supply current is much too high for the op amp, or that I don't understand how a breadboard works. But I have watched countless videos and have been working on this for over a week, well over 20 hours trying to get op amps to work the way I would like them to, but have been completely unsuccessful. I don't understand what I am doing differently from every example I have watched and every diagram I have tried to copy.
If you need more information let me know.