A few circuit boards to provide the tube with the high voltage it needs, a power source, and a 3D printed case make this Geiger counter look like it was ordered from a Fluke catalog. The project ...
But as they are often built around the Soviet-era SBM-20 Geiger–Müller tube ... An unfortunate bug was discovered in the HV circuit. That said, [g3gg0] decided early on that the design would ...
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