Hydrogen! It’s a highly flammable gas that seems way too cool to be easy to come by. And yet, it’s actually trivial to make it out of water if you know how. [Maciej Nowak] has shown us how to do just ...

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.

No power? No problem. For avid campers or those who are nervous about electrical outages, a portable generator should be readily available to you at all times. That’s why we were excited to find the ...

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 ...

Our product picks are editor-tested, expert-approved. We may earn a commission through links on our site. Why Trust Us? YOU EVER drive through a neighborhood in the middle of a blackout and see that ...

Commercial curve tracers have existed for decades. But designers without access to one can create a simple circuit that uses a function generator and oscilloscope to generate JFET transfer and ...