Hey guys, I'm working on a project involving a PIC microcontroller and the generation of composite video signal.

Now I want to generate some tones and play them in the TV speaker (using an RCA cable for audio). Does anyone know what audio voltage levels are safe to send to the TV set?

Thank you all!

 

Audio input is Line Level

~1V AC (1.5v peak-peak) with 10k output impedance should work with about everything.

 

Oh, all right, thank you very much!

 

I would be interested to see what you come up with for audio from a PIC. Will you use just the pic or will you use some type of sound chip too, e.g AY-3-8710 series? Still some floating around.

Cheers.

 

dont forget your tv uses a smps which means the chassis of the set is live....if you dont design your circuit to cater for this there will be a very expensive bang on switch on....