This circuit for automotive use was found in American documentation from the 90s. The circuit uses common components today. The relay is 12 V.
This circuit for analog video signals was found in the August 1970 issue of Radio Electronics...
Found in a 90’s 73 magazine for radio amateurs, this circuit provides a few milliamps of output...
This circuit was obtained in a technical publication from the 1970s. It fires a diac and thus a...