Engineer creates a titanium ring that glows when he and his partner are together.

So how does an engineer propose to his lady? Why, with an LED light-up engagement ring, of course! Engineer Ben Kokes built a titanium engagement ring that glows when his fiancé is close.

Kokes built the ring himself and incorporated an LED and copper coil assembly inside, which illuminates the ring from inside when it comes close to an induced alternating magnetic field–a device he called ‘the transmitter.' The transmitter is worn as an armband and concealed under a jacket.

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