This circuit was found in an English magazine from 1977. Signal inputs and outputs must be shielded, and the circuit can be powered by battery, since its consumption is low.
This simple intermittent siren circuit was found in a 1989 documentation. Both the intermittent and...
This 1969 Electronics World power supply has 5 V to power digital circuits and a 170 V output for...
This circuit was found in a 1980s documentation from the manufacturer of the integrated. The...