This powerful siren is suitable for warning or alarm systems. The components are current and the transistor 3055 must be mounted on a good heat sink.
We found this circuit in an American publication in 1973. The circuit generates a low frequency signal...
The L293 circuit is not common today. We found this circuit in the 1982 SGS linear integrated...
This circuit makes use of an uncommon integrated circuit. It can provide a power of 6 W when...