Building Geiger Counter

TotalMadness

New Member
Hi,

I'm interested in building the geiger counter attached below. However, their are two areas on the circuit diagram that I do not under stand. Can anyone explain what the area in the red and blue squares are for?

Many thanks
 

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hi,
The Red is the Geiger Tube, the Blue power decoupling 330uF 25Vwkg capacitor.
 
Last edited:
Blue one's easy: it's just an electrolytic filter/decoupling capacitor (330µF/25V, between the +9 volts and ground).

The red rectangle is apparently the Geiger detector. I have no idea what these are or how they work.
 
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