Unlike other rings, this one by San Francisco engineer Ben Kokes designed a high-tech ring to propose to his fiance. Concealed within the ring are tiny LEDs which light up when Kokes is nearby, illuminating the stones in the titanium ring. Continue reading for a video and more information.
Hazel Chua reports that “Ben started out by designing and developing a circuit that would be able to power up the ring inductively. In the end, he used a coil of wire wound around kaplon tape as the inductor and a small SMD capacitor to power up three tiny ultra-bright LEDs.”