We’re working on a kind of urban game related to electromagnetic fields. We made a simple prototype today that uses arduino to sense EMF and indicate on an analogue panel meter (like a VU meter) the strength of the field.
I plan to add a periodic click (a la geiger counter) and there is a nice red light that means “too close”. I think it will be a two player game, where you must find a way to meet the other player and touch devices to win. But you can’t go too near any EMF fields (that includes the other person as people seem to generate them – weirdly!).
It’s nice to see an analog representation of the information.
At the same time I got hold of some nice light bezels which we plan to incorporate into the device.
The nice faceted lens looks like a crystal.