I have read this arduino post:
http://forum.arduino.cc/index.php/topic,17338.0.html
and looked through the instructable referenced in that post:
My first question is simple (I think). I am completely ignorant when it comes to electronics - I am learning as I go.
I would like to sense the level of 15 different glass bottles containing misc liquids. I will only need to sense the level of one bottle at a time. Will I need to use 30 IO pins for this? Is there a way to do this so that I can 'share' a common pin between all bottles?
Thanks in advance.