This TTL circuit was found in an American documentation from the 80s. The components are common in the series and the supply must be made with a voltage of 5 V.
This configuration, which can be found in other LM324 manufacturer's manuals, is from the 1982 SGS...
The circuit presented was found in a 1988 documentation. It consists of an alarm siren that it...
We found this shield circuit in a 1991 technical documentation. The phototransistor can be...