If you can turn a wrench and operate an electric drill, you can build this simple generator in two days. Turn a car alternator into a homemade wind turbine by building this cheap and easy DIY wind ...

The Ecoflow Portable Power Station is on sale at Walmart for less than $200. Shoppers say it's "quick to charge and maintains ...

Simple triangle-wave generators have a weakness in that the waveform of their output signal normally cannot be modified. The circuit presented here makes it possible to smoothly alter the waveform of ...

[Debraj] needed a simple signal generator for a project he was working on, but didn’t have one handy. He found that the easiest and cheapest way to get clean, reliable signaling was by using something ...

As the world has moved towards sustainable energy sources over the last few years, it’s increasingly common to be close to a wind turbine. The huge turbines visible on the horizon from where this is ...

Editor’s Note — October 9, 2025: We checked our recommendations to verify that they are still in stock and competitively priced. We’ve also added a standby generator, the Generac Guardian 22-Kilowatt ...