NXP SemiconductorsGeiger Counter
Created: Mar 23, 2014
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Description
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Summary
A Geiger counter, also called a Geiger-Muller (GM) counter, is a type of particle detector that measures ionizing radiation. It detects the emission of nuclear radiation: alpha particles, beta particles, and gamma rays by the ionization produced in a low-pressure gas in a Geiger-Muller (GM) tube, which gives its name to the instrument.
A High Voltage generator (U1, U2, Q1, T1, and associated components) powers a GM tube. A pulse from the GM tube is interfaced through Q2 and U1 to pulse-generator U3, which drives a speaker.
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3 Comments
Rick.Curl
I think you've got the wrong transformer here.....
Posted: Aug 26, 2014
Oppie
On the GM counters I worked on in the past, the plateau voltage was 800-900V. For safety reasons, the metal outer case (cathode -)was at ground potential. The signal was capacitively coupled with 1000 pF 3KV rated from the Anode.
Posted: Aug 26, 2014
PB Fortich
Yah, I observe this one before but I think its okay now. The transformer has been replaced already
Posted: Dec 22, 2014