Re:FTLAB FSG-001 – A $30 Geiger Counter for Android and iOS
by hatsunearu on Saturday July 30, 2016 @11:51AM
(#12193465)
If you're looking for some fun, you can reverse bias a zener diode and measure the noise that comes out of it. It's shot noise, and you can measure it quite easily with just some simple passives and an ADC.
[ Parent
| on HN ]