I have a circuit I am working on and I need to be able to detect if current is flowing through certain GPIO (breadboarding wires really), but I'm not totally sure how to go about it!
Would I want to use GPIO pull up/pull down somehow or what? This google code page looks like it will be useful for learning that (https://code.google.com/p/raspberry-gpio-python/wiki/Inputs), but will it solve my problem?
Basically what I want to do is be testing to see if any current is flowing, I don't need to measure it at all. I would need to run a simple LCD (http://www.foxytronics.com/products/173-16x2-dot-matrix-character-lcd) and maybe a few LEDs (not necessary) but what I need to know the most is is it possible to test to see if any current whatsoever is coming through.