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 ...

Well-known industry author and instructor Jim Johnson is offering a new video for technicians who want to sharpen their troubleshooting skills. "This HVAC training video program, is available in DVD ...

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 ...

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

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 ...

Block diagrams can be written, usually in boxes, with the headings input, process, and output. When planning how a circuit will function, these headings are then used to plan what the input, process ...

Here is a 100 Watt inverter circuit using minimum number of components. I think it is quite difficult to make a decent one like this with further less components. Here we use CD 4047 IC from Texas ...

Here is a simple and powerful LED circuit that can be operated directly from the AC 100 volt to AC 230 Volts mains supply. The circuit can be used as mains power locator or night lamp etc.. The ...

Instructables is great, don't get us wrong, but if you're just looking for a sweet new Arduino project or a super-charged Atari Punk Console, wading through the piles of Lego swords and wreath-making ...