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 ...

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

[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 ...

Solid state relays (SSR) are electrically operated switches with no moving components and are used to isolate circuits or batteries, detect faults on transmission and distribution lines, and control ...

Relay boards are computer boards with an array of relays and switches. They have input and output terminals and are designed to control the voltage supply. Relay boards provide independently ...

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 ...