I’m interested in unusual things, so.. I MUST HAVE THIS!!! 😎

Found tons of articles, noob videos and so on, so i picked one i like for testing..
Minor side note on sensitivity: IF THIS DETECTS SOMETHING(>10cm), RUN FOR YOUR LIFE!

Source of schematics:

Conclusion: DAMMIT ITS WORKIN‘

Current state: waiting for better sources of radiation

Further plans:
# make new completely surface mounted flat PCB
# insulate components side and use thermal conductive glue to fix metal sheet on top

why??? because the 4117 JFET has some nice pictures in datasheet describing behavior @ -55°C 😀
and how do we get to -55°C??? LN2??? 😀

# place it on 48W peltier with 125w heatpipe cooler
# make some cool testing
# make some more pieces of THT version boosted with Arduino counter + SSD1306 OLED + cool gauges