Worried about radiation levels? I'm not, but I still want to build one of these. Mr. Fission here was built by the same guy that's behind the OpenTracker project. [Scott] based it on the Bargraph Geiger counter built by [Russel E. Cliff]. Both use a standard Geiger tube like the LND712. The tube works with high voltages - easy enough with older electronics, but it's a slightly tougher challenge … [Read more...]
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