In the desktop 3D printing world, we’re fortunate to have multiple online repositories of models that anyone can load up on ...

The basis of almost everything we discuss here on ExtremeTech is the transistor -- but just above that is a topic that we usually skirt around because no one, even hardcore nerds, really know anything ...

CircuitLab is a free, web-based tool for creating schematics: it’s dead simple to place resistors, capacitors, batteries and way more onto the drawing board and connect it all together. You can also ...

When looking for things to write about, there is nothing we like to see more than well-documented schematics and code available for download. In the case of schematics, we realize that they can be a ...

Beeps when hears your whistle, A gadget suitable for key-holders, games etc. Some 20 years ago it was common to see small key-holders emitting an intermittent beep for a couple of seconds after its ...

Maybe my Google-fu sucks, but I've been having trouble locating good circuit design software that doesn't cost an arm and a leg. At the moment, I'm mostly just interested in something that will help ...

Is the battery empty, or is there something wrong with the device? That’s always a difficult question when your walkman or some other battery-powered device appears to be dead when you switch it on.

Chaotic circuits can arise from either computed (using Analog Computers or Digital Computers) solutions to coupled differential equations or from unstable systems/circuits. A new open-source circuit ...