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 ...

This two-transistor white noise generator has a surprising feature – about 30dB more noise than the more traditional designs. Q1 and Q2 can be any small-signal transistors with a beta of up to 400.

Editor’s Note — March, 2026: Winter storms have been causing all sorts of power outages and generators are in high demand, we’ve checked the products in this story to make sure they are still in stock ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? When using generators, many people overlook or are confused by bonding and grounding.