How do I make 2 or more objects light up when they come near each other, or get brighter, or change color? any ideas?
How do I make one or 2 objects(I have in mind small objects) light up when they come close to each other? or brighten or change color? Some one suggested proximity sensors. But then they would react when anything came close. He then suggested using magnets in some way so they would react to each other.
I have a lamp that turns on when you wave your hand over it. If you place your hand close to the top of the container then slowly raise it the light will brighten, then dim as you lower your hand. Not sure if that is related to my quest, though I am interested in that also. Any ideas?