Super cool!!
The pitch going up is coming from whatever you patched the module into, right? Or did you make a mod to get some kind of tic/sec cv? I guess an integrator with a slow decay could do that.
That could be cool but… no, just a slow ramp into the oscillator!
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I swapped in the fabricated FR4 front panel
and posted my schematic, panel design, and bracket STL file:
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Not really applicable to the module - but still super cool.
I guess I didn’t mention above I did try putting a banana close to the Geiger tube. It doesn’t do much!
Bananas contain a lot of potassium, and naturally occurring potassium includes potassium-40, a radioactive isotope, at a level of 120 ppm. So bananas produce radiation, though not enough to justify establishing a radiologically controlled area in the grocery store produce section. And not enough to set off a $25 AliExpress Geiger counter very often.
I also tried this:
It’s 100% potassium chloride, so presumably contains much more potassium than a banana. I put the whole 3 oz. in a baggie up against the panel. And… I think it does give you a higher trigger rate. Still pretty slow, typically tens of seconds between triggers, but probably higher than what I was getting for the background rate.
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Great video! I should get some uranium ore…
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Ohhh yesss, time to take this thing to the next level
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