The electronic door lock has become popular as a high-tech means of securing property and possessions. Nerd Beach presents this article as a service to those of you who use such locks and do not have knowledge of the simple magnetic ring, known as the "Ring of the Devil"
The application is simple – the ring is placed near the door lock and spun. The magnetic field interaction can either activate an electric motor or charge a dynamo coil in a electromechanical lock. Watch the video below, and then perhaps reconsider any electronic locks you now have in place. [more]
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