VIDEO Our museum has a couple of spicy pieces in their rock collection

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Equipment First successful DIY counter build!

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I first tried with an SI-3BG, and thought something was wrong with my circuit. It’s just a very insensitive tube and detects one particle like, every other minute.

But then I got a $20 Chinese tube from AliExpress, and it works! Super excited! Making a PCB and an enclosure now. BTW the Chinese tubes use a conductive coating for the cathode and it makes them so pretty

The circuit is the Mighty Ohm counter (schematic open source online) on a breadboard, minus the microcontroller. I still plan to add one for logging, dose calculations and driving a display

Everyone who is interested should try and make one, it was only about $25 usd in parts (most of it the tube), and it put me in a good mood all week.

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