Geiger Counter Case (Assembled counter from Amazon)

thingiverse

Needed a Geiger counter to check out some ore samples a friend gave me. Bought an inexpensive one from Amazon that was already assembled and had a small display on the board. This one is also available from Ali Express, eBay and possibly other sources for widely varying prices. If you need one though, it's a good compromise from the really expensive ones and it does work reasonably well (Tested with a Geiger counter test strip - available on Amazon and eBay.) It generates pretty high voltage (390 volts) to operate the Geiger tube, and the terminals are somewhat exposed so I designed a case that will help keep fingers out of the HV but still allow easy access to the Geiger Tube area for measuring samples. The results turned out decent so I'm posting it here. Not putting up links for the counter as Amazon was low in stock and using the photos, you should be able to find one on the other sources easily enough. There is no manual available but the display is in micro Sieverts per hour and the one push button switch changes between two display views. The unit is powered through either of two USB ports on the board so it's easy to get running. For portable operation, use one of those USB power banks and a short cable. Easy. I designed it using Fusion360 and the .f3d files are included so F360 users can edit it to suit themselves.