This circuit was published in Radio Electronics magazine in June 1959. The circuit uses an inverter with transformer to generate the high voltage of the Geiger tube.
This circuit was found in the May 1989 issue of Radio Electronics magazine. The components can be...
Using the 741 this basic circuit was found in the November 1973 Radio Electronics magazine. The...
This circuit came out in an English magazine from 1977, but it can be easily assembled today, as...