This circuit was found in an old factory documentation. The circuit uses single-junction transistor SCRs at the time. These components support modern equivalents.
This simple teaching circuit uses 5 transistors in a monophonic organ version whose notes are...
This capacitive switch or approximation relay was found in a 1980s US publication. Power should...
This electronic siren circuit, found in a 1982 documentation, uses three oscillators mounted...