Some ARM chips will fit on the head of a large pin, and even in Atmel world, the ATtiny10 comes in a tiny ... re looking to break out of the world of Arduino, and you can do some pretty cool ...

What if your keychain could tell you the temperature, all while staying battery-free? That’s the essence of this innovative keychain ‘NFC_temp’ by [bjorn]. This nifty gadget harnesses energy ...