Measuring the power drawn by electrical appliances accurately is achieved by this Enerjar project which is an easy-to-build device. The voltage and current traveling through the mains is measured by ...

Sometimes the best designs out there are not ‘products’ that can be purchased — but big ideas made accessible to all through the power of Do-It-Yourself design. The award-winning EnerJar takes the ...

PiggyMeter is a wonderful example of a device that you never knew you needed – simple, elegant, easy to build, and accompanied by amazing documentation. It’s a snap-on interface for electric meters, ...

An DIY RF decibel (or power) meter is an indispensable instrument in any radio workshop. Unfortunately, accurate, wideband models are fairly expensive, and home-constructed ones are generally not ...

As USB-C PD becomes more and more common, it’s useful to have a tool that lets you understand exactly what it’s doing—no longer is it limited to just 5 V. This DIY USB-C PD tool, sent in by [ludwin], ...