Flipper Zero Geiger Counter
14 comments
·September 18, 2025Chabsff
I know that footguns are broadly "on-brand" for the flipper zero ecosystem, but exposing high-voltage leads like that without any warning whatsoever seems a bit much.
JohnFen
I don't know about the details of this device, but in general, simply being high-voltage doesn't automatically mean its dangerous. One of the machines I work with on my day job has probes that put out around a thousand volts, but it's totally safe to touch them with your bare hands. You won't even feel a tingle.
That said, it's always prudent to treat any live electrical line as dangerous unless you know for a fact that it isn't, of course.
superxpro12
Is there a schematic? How high we talkin?
ge96
There is a subreddit where people measure the radiation given off by random things you'll see them pointing some device at the ground or an object.
Like an old glass cup
joahnn_s
We need the iconic sound of the geiger counter
jasonfrost
Really neat. It'd pair well with an alarm the user can set at the appropriate turn back dose for custom doses and concerning dose rates
morninglight
Do a search for "MightyOhm Geiger Counter Kit Bundle" and you will find a stand alone version of the same circuit along with photos. Although the PCB has a "High Voltage" label, it is powered by 2 X AAA batteries which are might be very lethal if ingested.\s
This project is neat and OP did a good job, but I think the interest in Geiger counters among hackers needs an update. The Geiger kit on Adafruit (Yes, I know that makes the cost a lot higher to be from them instead of Ali, but I think is a good baseline for "finished good" price) is $99.
Meanwhile, Raysid or Radiacode let you do full on gamma spectrometry, for about 2.5x the price.
And, like, yeah, 2.5x the price. I'm not oblivious to that being significant, but to me it's sorta like an GT1030 with DDR4 - it's about $100 or you could get an RTX 3060 for a bit over $300. Like, you might have a use where you ONLY need a cheap display card, but there's a reason LTT calls the 1030 eWaste from the factory. Similarly, you might get enough out of the Geiger or it might do something the Radiacode doesn't for you but for most hobbyist, I doubt it.