This circuit is for analog TV video signals and was found in the March 1988 issue of Radio Electronics magazine. The circuit uses a Maxim integrated circuit that can still be found.
Found in a 1990s US publication, this alarm circuit detects when a light beam is interrupted. Optical...
This General Electric circuit, in a documentation from the 1960s, allows the use of high...
This circuit eliminates hiss and other noise from audio sources by cutting frequencies above 10...