If you want to make some sound from your speakers but you don't have ipod or any other mp3 source you've come to the right place. The circuits given in this instructable will make some sound from your speaker. All of the circuits given in this instructable are based on a 555 timer/oscillator ic. This instructable has only 5 circuits but there are many other circuits.

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Step 1: 555 Ic

First you should start with your 555 ic. In order to make the circuits in this instructable you will need to know a about the 555 ic. For this you need you only need to know about the pinout. The pinout is given in this step.
Please explain the complete working of machine gun circuit...
Would it be possible to provide sound clips from each circuit?
have you actually built these? it would be awesome to see a demo video of each of them, I don't think I've ever heard a machine gun or wailing siren. thanks!
I've built all of these amd they work

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