This circuit was found in a 1960s Motorola documentation. Transistors are types of the time and can be replaced by modern equivalents.
This simple circuit was found in an English magazine that no longer exists, January 1970 issue. It is...
This circuit, suggested by a 1975 documentation, detects an electrical discharge in a storm by...
This circuit for timing small loads was found in a 1964 General Electric documentation....