Discover how to build a simple electromagnetic motor and generator using everyday materials in this hands-on science ...

[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 ...

Explore the fascinating world of clean energy with this step-by-step DIY magnetic generator build. Learn how everyday items like a CD, magnets, and copper coil can generate electricity using the ...

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.