Output Specific Tones

[airman00]

Heres what I want to do


have an ipod emit a distinct sound ( not sure what that means , but lets say 10khz) and then have a microcontroller do ADC on that signal coming from the ipod and be able to detect it.\

Then I want to do multiple sounds or frequencies and have the MC differentiate between them

Will my idea work,or is there a better way?

Thanks,
Eric

[HDL_CinC_Dragon]

Detect the frequency through a microphone or a direct wire link? To get the ipod to emit the frequencies, simply create sound files of that specific frequency on your computer and upload them to your ipod.

What are you trying to do so that perhaps we can suggest something more suitable to what you need?

[airman00]

Direct wire link

What I want to do is have an IPOD provide instructions to a circuit , with a microcontroller to translate that signal from the ipod

[paulstreats]

You could make robots that talk to each other with music like the aliens on close encounters of the 3rd kind

[kd5kfl]

Have the iPod put out DTMF, AKA Dual Tone Multi Frequency, AKA Touch Tones. DTMF decoders are everywhere and cheap. You get 12 tone combinations to send commands with. Radio Shack has them.

Google DTMF

[airman00]

i was thinking of DTMF , but wouldn't it be easier to just do a different frequency tone?

are dual tones really necessary?