Old Civil Defense survey meters like the V-715 are interesting conversation starters, but of very little practical use today. These devices were intended to be a sort of litmus test that survivors ...

There’s no shortage of Geiger counter projects based on the old Soviet SBM-20 tube, it’s a classic circuit that’s easy enough even for a beginner to implement — so long as they don’t get ...

James said: Hey Max,your comment about DIY Geiger counters reminded me of a demonstration that I saw as a high school student… Back in the early '90s, Atomic Energy Canada hired a spokesman that ...

I got one today Ludlum 3 with the 44-9 probe. Anyhow coolest toy yet. I notice it clicks on occasion (background radiation) Some times I notice like a ...

Do you recall our old chum Jon Qualey – he who created DIY BASIC (the BASIC Interpreter for our DIY Calculator written in the DIY Calculator's assembly language)? Well… I was just roaming, roving, ...

A Geiger counter, also known as the Geiger-Muller tube, is an inexpensive and useful instrument used to quickly detect and measure radiation. There are two types of radiation, non-ionizing and ...