This circuit was originally suggested in a 1968 publication to generate a white mark (frame) on a film at regular intervals to serve as a time reference.
This circuit was found in the November 1992 issue of Radio Electronics magazine. It uses...
This touch-controlled circuit was found in English documentation from the 1970s. The components...
This circuit, found in a 1980 publication, limits the amplitude of the output signal to a value...