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Great followup info! Looking for the datasheets for the pin diodes I've got in the parts drawer to see if I can make the Maxim circuit. I know there's some ve

• 0zelot 6y ago
  The circuit used in the blog article is a very much simplified version of the Maxim one. And probably not so much worse in terms of signal to noise ratio: https://github.com/ozel/DIY_particle_detector/ https://github.com/ozel/DIY_particle_detector/ The ion chambers are impressive because even lower-cost. But they also detect the presence of people, touches and what not. :) My favourite aspect of silicon sensors like those PIN diodes is that you get the absorbed particle energy as well. In particular with alpha particles that gets quite interesting when measuring for example old ceramics painted with uranium glaze ('Fiestaware').