How to make police siren at home | simple police siren.

In this video i will show How to make simple police siren at home. I use Um 3561 ic for generating 4 tones.
Song: KIRA - New World [NCS Release]
Music provided by NoCopyrightSounds
Free Download/Stream: http://ncs.io/NewWorld
Watch: http://youtu.be/6nCSYh8vwv0
Circuit diagram:-
Police siren:- https://drive.google.com/file/d/1EZuupGOz3TiH9pqzLMjEshwqs3FmlM2c/view?usp=drivesdk

Ambulance siren:- https://drive.google.com/file/d/1Eds2TsFXfHPG6RDSPRGX92SnSu0tSnMt/view?usp=drivesdk

Fire brigade:- https://drive.google.com/file/d/1Ea1FJDXWgBc2KsDNsl5drsAhM1ESXXJs/view?usp=drivesdk

Machine gun:-
https://drive.google.com/file/d/1Ef8WLfzl1oww-HXH89qiz4WMSHUC4JhB/view?usp=drivesdk
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Видео How to make police siren at home | simple police siren. канала Er pankaj