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Logik
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Hi, for my integration class I am building a scanning tunnelling microscope (STM). I found some interesting designs and I choose the cheapest one (students are poor) witch uses a unimorph disk. The circuits are not that hard to build but I also need to understand them. I have some knowledge in electronics but not enough to understand every aspect of the electronics involved.
Here are the circuits (sorry pdf): http://www.geocities.com/spm_stm/Simple_STM_Rev_C.PDF"
The circuits are mostly composed op-amp's which i understand basicly but not enough to understand these circuits.
So here are my questions:
What are the effects of using a capacitor coupled with an op-amp (only used them basically with resistors)?
On op-amp in D1-D2 what is connected to 1 and 5 and what is the use of 1-5?
What are the TP (TP1,2,5,6)?
Instead of using and BNC male connector output for the oscilloscope is it possible to use an audio like male connector and plug it into a computer sound card (analog2digital) and use a software oscilloscope?
What are the uses of the potentiometers and how do they work?
Can the circuits be improved?
If you have any other suggestions don't be shy, I am opened to anything. Also don't be scared of being too technical, I will figure it out or read around to understand it.
Thank you in advance.
P.S. I will also post in the engineering design section and in quantum physics one for other questions. So if you are interested about other part or have a lot of knowledge on STM's you can go to the two other threads.
https://www.physicsforums.com/showthread.php?t=109369"
https://www.physicsforums.com/showthread.php?t=109377"
Here are the circuits (sorry pdf): http://www.geocities.com/spm_stm/Simple_STM_Rev_C.PDF"
The circuits are mostly composed op-amp's which i understand basicly but not enough to understand these circuits.
So here are my questions:
What are the effects of using a capacitor coupled with an op-amp (only used them basically with resistors)?
On op-amp in D1-D2 what is connected to 1 and 5 and what is the use of 1-5?
What are the TP (TP1,2,5,6)?
Instead of using and BNC male connector output for the oscilloscope is it possible to use an audio like male connector and plug it into a computer sound card (analog2digital) and use a software oscilloscope?
What are the uses of the potentiometers and how do they work?
Can the circuits be improved?
If you have any other suggestions don't be shy, I am opened to anything. Also don't be scared of being too technical, I will figure it out or read around to understand it.
Thank you in advance.
P.S. I will also post in the engineering design section and in quantum physics one for other questions. So if you are interested about other part or have a lot of knowledge on STM's you can go to the two other threads.
https://www.physicsforums.com/showthread.php?t=109369"
https://www.physicsforums.com/showthread.php?t=109377"
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