Geiger Counter Schematic. To begin i will explain the basics of how a geiger counter works. The basic geiger counter consists of a a low current 100µa high voltage power supply b a pulse detector circuit ideally matched to the tube time constant and whatever you want to attach to the output by way of clicks beeps flashes dials digital counters or alarms.
A geiger counter uses a special tube filled with inert gas at a very low pressure to detect radiation. Although your geiger counter seems to. The basic geiger counter consists of a a low current 100µa high voltage power supply b a pulse detector circuit ideally matched to the tube time constant and whatever you want to attach to the output by way of clicks beeps flashes dials digital counters or alarms.
The output of the mini step up transformer is fed to a voltage doubler.
The 4049 hex inverting buffer is set up as a square wave generator. Inside this tube there is a cylinder shaped piece of metal that acts as a cathode. You ve probably seen someone using one in a movie to detect radiation. The tube is mounted with cable clamps over a hole in the bottom of the box covered by a perforated aluminum shield.
