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6 Simple transistor | police | ambulance Siren (audio alarm) circuits
Siren circuit page 2 : security circuits :: next.gr Police siren 6 simple transistor
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![siren circuit Page 2 : Security Circuits :: Next.gr](https://i2.wp.com/www.next.gr/uploads/7/Smipl%2BUS-Style_Siren_Circuit_Diagram.png)
![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-600x286.jpg)
6 Simple transistor | police | ambulance Siren (audio alarm) circuits
![Make Police siren circuit using 555 timer, transistors and OP-AMP](https://i2.wp.com/www.eleccircuit.com/wp-content/uploads/2017/05/Police-sirens-sound-with-ic-555-500.png)
Make Police siren circuit using 555 timer, transistors and OP-AMP
![POLICE SIREN - Basic_Circuit - Circuit Diagram - SeekIC.com](https://i2.wp.com/www.seekic.com/uploadfile/ic-circuit/s201385204348950.gif)
POLICE SIREN - Basic_Circuit - Circuit Diagram - SeekIC.com
![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