A portable, sensitive, low power, analog Geiger counter (2025)

A portable, sensitive, low power, analog Geiger counter (2025)(ludens.cl)

56 points by crorella 4 days ago | 3 comments

why_at 1 day ago |

I've wanted to build a geiger counter in the past but I've always been discouraged because it seems unlikely that I would be able to use it for anything other than maybe testing one or two things in my house like smoke detectors.

Animats 1 day ago | |

You won't get much from the americium in smoke detectors. They're alpha emitters, and ordinary Geiger counters will not detect alphas.

You can build an alpha detector.[1] Even a sheet of paper or a modest distance in air will stop alpha particles, so the detector has to be exposed and the emitter has to be close. A detector inside a glass tube gets nothing from alphas.

[1] https://hackaday.com/2022/01/22/detecting-alpha-particles-us...

jpl56 14 hours ago |

- Where do these vegetables come from ?

- click...click...click...

- Tchernobyl. Thank you.