FREE CIRCUIT DIAGRAMS 4U: Three sirens in one Circuit

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Thursday, September 29, 2011

Three sirens in one Circuit

This is a siren circuit diagram Here I have used UM3561 circuit diagram.This circuit can be operated with 3V.It can generate 3 sirens.Here I have used IC 2SC9013 you can use the same IC or similar IC. Use 8ohm 0.2W speaker.