This circuit was found in an 80's Electronic Engineering. The circuit uses a multivibrator with neon lamps and an optical coupling system.
This variable gain circuit for analog video signals was found in a 90s Linear Technology...
This circuit was obtained from the 1976 Siemens integrated circuits manual. It is the circuit for...
This circuit uses a 741 operational amplifier that must be powered by a symmetrical source of 6 to...