This circuit is from a Fairchild digital clock module shown in the March 1977 issue of Radio Electronics magazine. The circuit required a few external elements, including a common transformer.
Found in a 1980s documentation, this circuit works with a 12V relay. The horn is the boat's own. |...
This circuit was found in Delco documentation from 1966. The components are from that time....
This circuit, which can be built with several CMOS gates, was found in the March 1996 issue of...