Suggested by Philips in a 1970 publication, this circuit uses components from that time. No information is given about the trip transformer.
This FET mixer in a common source configuration was found in a 1980s documentation. The circuit...
This circuit is from an 80's component manual. The components are from the time, but the circuit...
Indicated as a joke or challenge this circuit shows how it is possible to control two lamps using...