This is an interesting proof-of-concept for a subway installation that lets people swipe their MetroCards in long slots on the wall, which sense it and produce a little sound and light show.

It looks like there are just sensor points that play predetermined things when swiped past, although having it extrapolate music from the actual card data would be cooler. In Boston, where we have the RFID Charlie cards, it might be interesting to do a similar thing with RFID readers—you could have the installation sense them while they’re still in your pocket!

It would be a fittingly creepy/pretty way to use RFID chips, I think.

(via Displaced Sounds)