Found in a Popular Electronics from the 90s, this circuit presents the difficulty of obtaining the Geiger Tube. The other components are common, admitting equivalents.
The CMOS 4046 integrated circuit is seldom used, both due to the difficulty of finding it and the...
Found in a 90s Popular Electronics, this simple circuit turns on a light when the light stops to...
Found in a 1970s RCA documentation, this circuit generates signals according to the component...