[Swlug] DIY Geiger counter

[Alan Gray]

Hello James

I am glad to see the small svg file does work. I can view correctly on 
both desktop and phone. There are svg editors for phones, but I prefer 
to use Inkscape on the desktop. I hope you realise that you can 
copy/paste, move, rotate and resize the components I have drawn. Adding 
more is easy enough. The initial drawings took a while, but once done 
the final circuit was very quick. Just cut and paste components from the 
top line, rotate and position. Add a couple of wires and its done. Of 
course you can reuse by cut and paste to a different document.

I am not sure what the Hackaday pdf shows. There is info on a Github 
page, but there was too much to wade through. If you need the schematic 
shown then it is a png file. I loaded it on my pretty much vanilla 
debian desktop, rotated 90 degrees and printed on A4. Good result.

Your comment "Exposed to what"? Well probably atmosphere. The 
unprotected crystal is hygroscopic which means it will absorb water. 
Some of the designs remove the protective glass in order to improve 
sensitivity to particle radiation.

Regards

Alan Gray