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[on:]

Hi everyone!

I am starting a new project; I am making an FM transmitter. Is there any code out there that takes audio from an ipod and transmitts it to any FM station? Thanks!

[Reply #1 on:]

Is there any code out there that takes audio from an ipod and transmitts it to any FM station?

For an Ardiuino?
No.

[Reply #2 on:]

The only way I can think of to do this is with a RF DDS chip - such as AD9851.
DDS chip generates RF signal from a serial-programmed frequency, and you can update the frequency
in real time to simulate frequency modulation.

Not a small project though, experience with analog and radio-frequency circuitry would be required.

It would be far easier to buy a pre-built FM transmitter module (all analog electronics) - and this would probably
perform better too (in terms of less spurious signals).  These tend to be fixed frequency though, whereas DDS
techniques give control over frequency.

[Reply #3 on:]

If you only want the Arduino to control the frequense of the FM-transmitter you could use something like this:

http://www.electronics-diy.com/electronics/schematics/TX200_PLL.jpg

It uses varicaps in the tuning circuit. You could then use a digital potmeter to control the frequence

[Reply #4 on:]

Thank you guys; I was just curious if it was possible with the Arduino because I have already made the analog transmitters. Thanks again!