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![Police Siren circuit NE555 ~Circuit diagram](https://2.bp.blogspot.com/-TbA0kpaGb5k/T0tnMnderxI/AAAAAAAABlw/hnygtjS3QgM/s800/NE555%2BPolice%2BSiren%2BCircuit.png)
![Police siren](https://i2.wp.com/www.circuitstoday.com/wp-content/uploads/2009/07/police-siren-circuit-300x209.jpg)
Police siren
![Siren Generator using IC UM3561](https://i2.wp.com/electrosome.com/wp-content/uploads/2014/07/Police-Siren-usingIC-UM3561.jpg)
Siren Generator using IC UM3561
![LED Police Siren | Let's Start Coding | Coding for Kids](https://i2.wp.com/lets-start-coding-public.s3-us-west-2.amazonaws.com/Parts+List+Graphics/Chapter+2+Combined+Functions+Parts+List+Images/2_1-Police-Siren.png)
LED Police Siren | Let's Start Coding | Coding for Kids
![POLICE SIREN Circuit - Basic_Circuit - Circuit Diagram - SeekIC.com](https://i2.wp.com/www.seekic.com/uploadfile/ic-circuit/201335203732926.jpg)
POLICE SIREN Circuit - Basic_Circuit - Circuit Diagram - SeekIC.com
![Make Police siren circuit using 555 timer, transistors and OP-AMP](https://i2.wp.com/www.eleccircuit.com/wp-content/uploads/2017/05/european-police-siren-circuit-600.png)
Make Police siren circuit using 555 timer, transistors and OP-AMP
![British Police Car Siren - Circuit Scheme](https://i2.wp.com/circuitscheme.com/wp-content/uploads/2009/11/Police-Siren-Circuit-Diagram.gif)
British Police Car Siren - Circuit Scheme
![အီလက္ထေရာနစ္ နည္းပညာ: May 2009](https://3.bp.blogspot.com/_W2bhHEnYtpY/Sh4v6D2manI/AAAAAAAAAKc/Tif-xlNBhlw/Police+Siren.gif)
အီလက္ထေရာနစ္ နည္းပညာ: May 2009
![6 Simple transistor | police | ambulance Siren (audio alarm) circuits](https://i2.wp.com/www.eleccircuit.com/wp-content/uploads/2020/02/American-Hong-Kong-police-siren.jpg)
6 Simple transistor | police | ambulance Siren (audio alarm) circuits
![Relay for siren on police car](https://i2.wp.com/www.the12volt.com/installbay/uploads/528_siren.jpg)
Relay for siren on police car
![Simple Police Siren Circuit | Electronic Siren Circuit Diagram Using](https://i2.wp.com/circuitspedia.com/wp-content/uploads/2018/04/Siren-sound-circuit-diagram.jpg)
Simple Police Siren Circuit | Electronic Siren Circuit Diagram Using