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Originally Posted by Aurificus
1) "Be Discriminating, Focus attention on the signals...they are not the same as the noises."
2) take a Dog to a rock concert.... if you want to detect a pin drop!
3) google Seebeck effect
4) to be continued....more to come 
Kind wishes to you, also
Aurificus |
Interesting.
From what I can gather, these things you learned pertain to the following:
1) Be Discriminating, Focus attention on the signals...they are not the same as the noises -- pertains to the concept that the noise does not matter if you only want to detect the signal.
2) take a Dog to a rock concert.... if you want to detect a pin drop! -- pertains to the concept that you should use a detector that cannot hear the noise, it only hears the signal you want to find.
3) google Seebeck effect -- pertains to the concept that the Seebeck effect, or Peltier effect of generating electricity from the junction of two dissimilar metals at different temperatures will allow an IR LED to detect a buried coin.
4) to be continued....more to come -- pertains to more examples like those above to be seen in future episodes of how an IR LED responds to the thermal gradient of a buried coin.
I must congratulate you for persevering through the challenges that tend to illustrate how the thermal gradient of a coin cannot be detected when buried some distance below a normal soil surface.
Best wishes,
J_P