This is a circuit suggested by Linear Technology in a 1980s documentation. The integrated circuit is from the era. Observe the input and output voltage.
Found in a 1980s documentation, this circuit works with a 12V relay. The horn is the boat's own. |...
Originally suitable for photography applications, this circuit from a Popular Electronics from the 90s can...
This circuit was found in a 1968 documentation. The circuit generates three rectangular signals...