We found this circuit in an Electronic Engineering of the 90s. The circuit can be implemented with any logic and next to the diagram the truth table for the indications is given.
This simple intermittent siren circuit was found in a 1989 documentation. Both the intermittent and...
The tone produced by this circuit attract fishes. The circuit is installed into a small can and...
This proximity sensor circuit is from an 80's documentation. The used integrated circuits are...