Here’s an interesting little hack that will make those of you in London light up with glee. Some wisecrack DIYer went and dissolved an RFID-based Oyster card for the Underground. The result? A lot of wires and an RFID chip left behind. As you can see in the video above, the card continues to work flawlessly and can now be implemented into your hand, wallet or whatever you want to stick the chip in.
Although the method really doesn’t change anything about the card aside from appearance, it does open the door to some possible . Maybe you could replace the chip inside of a card with a different RFID chip your friend at the government lab re-programmed? The possibilities are (probably not) endless.