After a fair amount of designing and redesigning, I decided to make my geiger counter look like an old-timey cathedral radio with a detachable wand to check various sundries for radiation. It was a bit more ambitious of a project than I realized at first but I think the results were well worth the effort.
Step 1: Materials
Nixie tubes, drivers, and power supply
-electronic components to build a power supply for said Geiger tube
-various electronics tools, such as a multimeter, alligator clips, soldering iron, etc.
-an oscilloscope is helpful
12 V wall wart/power supply
multiposition selection switch + knob
curly phone cable + 2 jacks
clear tube to use as a wand for the geiger tube
-router and router bit
Money for laser cutting