[Peter] is calling this a “long lines relay” after old AT&T microwave technology, but it is essentially two Heltec modules set up to operate as Meshtastic nodes, where one can operate as a ...

He thought the best response was to devise a device that could read faint signals. The galvanometer, first invented in 1802, was a means of detecting electric current. It consisted of a needle ...

Before today, we probably would have said that scratch-built relay computers were the sole domain of only the most wizardly of graybeards. But this impressive build sent in by [Will Dana] shows ...

Thermal overload relays are protective devices. They are designed to cut power if the motor draws too much current for an extended period of time. To accomplish this, thermal overload relays contain a ...

Galvanometer optical scanners also called Galvos or Galvo scanners are motorized mirror mounts and systems used for laser-beam steering or scanning applications. They are ideal for moving small laser ...

THE electro-capillary machine of Lippmann and his capillary electrometer, besides the capillary electroscope of Werner Sieinens and the electro-chemical relay of Wheatstone are all illustrations ...

There’s no mistaking the 2015 Citroen Relay for anything else on the road – you can thank its huge chrome grille and bright, but optional, LED daytime running lights for that. You could also ...