I recently came up with a broken gameboy classic, so i wanted to use the case for something useful. My first idea was to put in a tiny television (aka LG's HB 620 T) But due to the bad software used in it, i decided to cancel this. Another try with a slightly bigger portable television didn't leave me happy, as i would have had to change the display window of the gameboy too much, which would have led to losing it's original face.
So I left the case in the closet for some weeks until I stumbled upon an old russian geiger counter I bought some 15 years ago on a flea market.
At that time I totally messed up the original case and never was happy with it (obviously!)
my costs for this project were:
40 $ for the geigercounter (long ago, so somehow not addable )
15 $ for the half bricked gameboy
4 $ for the rechargeable batteries
5 $ for both relays
4 rainy weekends sitting in my workshop :)
First I took apart the geiger counter and measured its PCB if it would fit in any way into the new case.