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.
Found in a 90s documentation, this switch that is also sensitive enough to operate capacitively uses...
This circuit was found in an integrated circuit manual from the 1980s. The circuit can be designed...
This powerful and sophisticated power supply was found in a 1998 publication. The circuit must...