We found this circuit in a documentation from the 90's. Information on the A/D converter was not given but types can be used according to the application.
This interesting circuit for SMD assembly appeared in the November 1987 issue of Radio Electronics...
This circuit was found in the June 1986 issue of Radio Electronics magazine. It is based on two...
Found in a 1980s documentation, this circuit works with a 12V relay. The horn is the boat's own. |...