Found in a 1965 Electronic Design, this high voltage circuit uses period transistors. Its purpose was to excite Nixie display tubes common at the time.
This circuit was found in a Popular Electronics from April 1993. It is a voltage regulator circuit...
This circuit was found in a 1967 US documentation. It shows how to build a gain control by digital...
This circuit was found in an American 1960s documentation. The circuit uses transistors of the...