[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 ...

Just about everywhere you go, there’s a reed switch nearby that’s quietly going about its work. Reed switches are so ubiquitous that you’re probably never more than a few feet away from one ...

“The door latch indicator system supplied with the [plane-making] kit was comprised of four magnetic reed switches… on the accident airplane, it appeared that only two reed switches had been installed ...