radioactivity and Geiger counters
09:51 ATTENTION: LET ME EXPLAIN BETTER. When I talk about electromagnetic radiation, which is absolutely NOT ionizing radiation, I mean that it could affect the electronics of the Geiger counter, distorting the readings, not that the Geiger counter measures it, because that's a completely different thing!
Short video on the dangers of radioactive objects and how to measure their radioactive emissions.
Probe used: Russian-made Si8b pancake.
Arduino circuit for a Geiger counter (Arduino Geiger counter).
You can also do it with a Geiger-Muller probe (Geiger tube).
Diy Geiger counter kits are available on the main online sales platforms. If you search with these parameters, you'll find a bit of everything.