When the magnet is removed, the flexible reeds spring apart and re-open the circuit. The reed switch was patented in 1941 by Walter B. Ellwood, a Bell Labs engineer. Ellwood was looking to design ...

[Lucid Science] shows us how to make some simple reed switches. Reed switches are simple components that detect a magnetic field and can close or open a circuit once detected. While not really a ...

A reed switch detects magnetic fields and sends pulses to a wire coil that powers the fan’s rotation. The result is a mesmerizing, wireless fan that floats effortlessly in place. This simple yet ...