The integrated circuit used in this detector is uncommon today. We found it in a documentation from the 70s. Detection is done by an optical camera with LEDs and a photo sensor.
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. |...