Wow! You know I have been helping people on the net with flyfishing related issues, but I have to say that I did not expect so much help.
Since I need that setup to be built quickly,
does radioshack carry all of the items I need? I indeed intend to use the 2nd day shipping, which kind of kill the cheap prices.
Answer to Triode:
How are you going to keep the lakewater off the components but alow it to flow between the LED and photodiode? The top of the diode and transistor can get wet, but the leads have to stay dry. I'm not saying it can't be done, there are many ways, I just thought it should be brought up. Good luck on your project.
--> Everything but the head of the LED and of the photodiode will be exposed but sealed inside a watertight casing. The author of the paper did a good job desc. the the housing of the sensor. Pretty easy to buid.
The author assume the reader would know enough about electronics for the rest... which I obviously do not.
Answer to crutschow
Rset is the potentiometer. OK. Got this now.
I do not even know what a photodarlington is... grin. Thanks for pointing me in the right direction
Answer to confounded:
I will buy a grab bag of resistors.
OK. Let continue showing my ignorance.
Rd and Rpt stand for what? They just are resistors aren't they? IT IS MENTIONED "Rd 750" on the schematics. not 750k.
For the IR LED are they all the same? I mean why the resistor and not mount it in direct? I understand that the resistor is to limit the amount of current getting to the LED. But does that mean that all the LED need the same current to function?
Now, for the soldering of the op-amp. How should I solder it? I understand that I need to read more about the use of Op-amp... but it looks like I am running out of time.
https://en.wikipedia.org/wiki/File:Generic_741_pinout_top.png
THANK YOU AGAIN.
Update: List from Radioshack. Cannot find Rd 750. Please advise.
**broken link removed**