hombremagnetico

I'm glad you enjoyed it! :) You're right, the fit might be tricky and depends on the tolerances off your 3D printer... is better to know the tolerances beforehand.

It worked! Sort of... :)

Thanks Penolopy! :) I used SolidEdge.

16 pages that must be read and signed by the interested parties of course. Kids included... XD

Don't trust me! It's a trap! :)

You're right, my girlfriend loves it! XD

STEEL BALL BEARINGS?? Well, at least they were easy to clean from the blood... :D

Health and safety is fundamental, but you know... sometimes you win, sometimes you learn! :)

Thanks Penolopy! I owe you a coffee! :)

Thanks for your feedback druševljan! Heat forming the bottle is indeed an interesting idea!

Thanks jeanniel1! :)

Hi kymyst, yes I chose a 30 degrees angle at the apex and I didn't implement any adjustment mechanism to keep the whole thing as simple as possible: it's meant to be just a demonstrator. Gluing it to the board is not mandatory but it helps a lot while tracing the curves.

That's a good idea!

Thanks! Share it if you do! :)

Thanks AlexanderS290!

Hi Ralphxyz, I agree, it is counterintuitive. It's easier to build one and try it! Let me know how it goes! :)

Thanks foxpup! It's much clearer in this way. I'll update the text... :)

thanks ronanry! :)

Thank you! If you are obsessed with radiation you should check my other instructable about a 3D printed spinthariscope :)The glow-in-the-dark filament is very nice... but it would glow just a couple of hours and it needs "charging". And it's not nuclear! :D

Don't worry, nothing so tragic... but you are likely to generate a black hole./s:)

Thanks! :)

Thanks for pointing it out!

Thanks Lee73!

Thanks Omega0397! I think it's a good suggestion... I should give it a try...

Thanks! I also have a PhD, Chemical and Energy technologies. Even breaking the vial the risk caused by the tritium is negligible. You should be more worried of the broken glass :) Anyone is entitled to their own opinion of course...

yes I did! For the benefit of mankind as a whole! :o)...(ahem...)

Thank you sir! :) The mechanism to reset it is called a de-coherer and usually it was a solenoid. A vibration motor will do just as fine I think!

Hi Sven, it's the multimeter's buzzer. After the spark the coherer is conductive and the multimeter's buzzer goes off.

Thanks! :) What do you mean with "modulator"?

you're welcome! :)

Thanks for the tip!

great! post your images of you do! :)

Hi James, the coherer is indeed a (cumbersome) latching switch. The dimensions could be lowered depending on the solution adopted. Anyway to get a reliable device you should experiment with filings size, wires distance at least. Other parameters influencing the behaviour are the filings composition (e.g. iron, zinc, copper or mixtures) and the use of a glass tube under vacuum for example...

Thanks Alex. I'm glad you like it! :)

Thanks for the insight!

Thanks brianchadorourke! :) Share it if you do!

Hi almateus, the new version is more suitable to be used with a USB microscope. The scintillations are brighter using the scotch tape screen, but I don't know if a normal webcam is sensitive enough. Putting the scotch tape directly in contact with the CCD (powder side facing outwards) should do the job though...

Thanks for your comment! I added a "legal bit" section as well.

Thanks for your comment! I added a "legal bit" section as well.

I'm afraid I can't help... :)

Thanks! :) Well... as long as the source is not ingested or touched with bare hands it should be pretty safe. But the better people to ask for info and authorization should be school's health and safety representatives. Every country has is own laws...

Hi SteveM245, I would say not more than 10 USD if you make it at home... (servo excluded)

Thanks indoorgeek! :)

Thanks gm280! It's quite an old-school project indeed :)

Hi Pedro, I'm afraid I don't have the eagle files anymore. But you can use the PDF files to make your own one, just remember to print them without scaling (1:1 I mean). Get them here:https://cdn.instructables.com/ORIG/FPN/6MDB/JMYWTA4Z/FPN6MDBJMYWTA4Z.zip

Thanks! I hope so... You don't always need Arduino or Raspberry PI to have fun... :)

Thanks! :) Smoke rings? Intersting! How would you implement it?