Do you have anything radioactive in your house? Most people will say no, but they are probably wrong. A host of things ranging from glow-in-the dark timepieces to smoke detectors have some amount of ...

Every mad scientist’s lair needs a Geiger counter. After all, if that UFO crashes on the back patio, you might need to know if it is hot. [Tanner_Tech] shows you how to build a cheap one that will get ...

I got some Geiger tubes a few days ago and built a very simple Geiger counter circuit that is powered entirely through the microphone jack (microphone connection provides a little power for things ...

Which Geiger counter is best? If you want to monitor radiation levels from a specific source, you need a reliable Geiger ...