SBM20 Geiger Counter

Geiger counters for me became a thing when Fukushima happend. Lukily I was already into electronics back then. But unfortunately not experienced enough to build a geiger counter.The idea to build one myself rather buying onem has followed me since

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Tefifon Modification

Not long a go I modified a Tefifon, because the original design wasn`t flawless.A Tefifon is the replay system for Tefi cartridges. Tefis are records on a plastic tape in a endless loop. One was quite dangerous. It didn`t have

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