Your phone is smart, so why shouldn’t your keychain be smart, too? A startup called Carabinsi added NFC chips to its carabiner keychains that can be programmed to do things like open a predetermined ...
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 from an ...
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