Control car horn frequency to produce different tones

Hi everybody,

I am thinking about controlling a car horn frequency to produce some kind of music (different frequency tones) when a button is pressed.

How can this be achieved?

You need to get a car horn that can change frequency when you sent it something.

This is not the normal way car horns work so maybe you should use a combination of a speaker and amplifier. Not sure where the Arduino fits in, you could do it all with a NE555 timer ans some buttons.

What Mike said - most horns are like electric bells, except instead of a striker, the electromagnet pulls on the back of a diaphragm.