NFC powered lights
A while I ago discovered these NFC powered lights. Basically you put them near your phone etc and they light up. Given how small they are, and how they are powered wirelessly from a normal phone, I thought they would be ideal for implanting.
There is one problem with them though, since the range is tiny, if you put your phone over them to power them, you will not be able to see them. and you can't put the phone behind the light to power it because your arm etc is too thick, they won't get enough power. To fix this I removed the LED and attached it to a ~1.5 inch wire, so that it could be seen even when a phone is covering the reader.
I have made 3 of these devices, but not yet coated them, the plan is to coat them in implant grade silicone
What do people think of them? does anyone want one of the prototypes to try it out?
PS: I was already building this before the other RFID light thread, but it is pretty similar to what was suggested there.