Police Siren

This project uses NE555.

Note

1) I used 12V DC for powering the circuit.

2) Instead of using two NE55 timer ICs, you can also use a single NE556 timer.

3) NE556 is nothing but two NE555 ICs in one package.

4) Refer the datasheets of NE555 and NE556 to have a clear idea.

5) Speaker can be a 64ohm, 500mW one.

*images are for visual description

1. PCB Board
2. Bread board
3. 64 ohm speaker
4. 2 x 68k resistor
5. 2 x IC1 N555
6. Some wires
7. and some more components

The circuit diagram is embeded with this step.