This circuit was found in the September 1972 issue of Radio Electronics magazine. The circuit uses an operational amplifier of the time and a symmetrical 9 V source.
This circuit was found in a Radio Electronics magazine from May 1967. The circuit has the time...
This detector is from the 1990 Motorola Dataar Databook, but can be adapted to work with more...
This grounding test circuit was found in an American 80's documentation. The circuit is for the...