TOKYO — In the Akihabara electronics district, a Geiger counter sold under the Shanghai Ergonomics Detecting Instrument Co.’s DP802i brand name costs $800. For that price, twice the cost in China, it ...

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 ...

Here is a scenario that can be considered a fallout of many of the developments of modern times. We have devices such as tablets, smartphones, TVs, and such that keep us informed and connected. Those ...