I've been working on a project and I need a way to detect when the two halves are in range. That range is about 1.5 in. The precision doesn't need to be too good, I just need it not to activate falsely.
Any suggestions?
I've been considering Inductive power, and NFC, but neither of them seems to be good for this situation
These are being held by someone, when they are brought together and the two halves (one in each hand) and are held very close (< ~1in) both sides need to identify that they are within proximity.
There will be 2 fingers worth of skin separating them.