off topic:
why am I not receiving any reply notification message about this thread, although I'm subscribed for "instant email notification"???

this sound like an awesome proyect i want to see the finish product

GOOD NEWS:
I successfully replicated my remote by simply using a PC and two IR leds!! No need for complex sampling hardware, a simple 0.50$ IR transmitting (yes, NOT receiving!) LED is enough for sampling; two ones are needed for replaying sample.

Going to test IR-playing on cellphones (as soon as I find suitable SW...)

Originally Posted by XianLi

If you are a Skilled iPhone Dev and wanna join this project to help to make the application a killer app, you can PM me. Also, if you have some idea about the logo and icon for the application, you can post them here.

Have fun

I connected an IR LED pair to pins 12 and 14 of my phone (see pinout); I tried both with or without the 10 ohm resistor (what is it for?!?), but with no luck, my devices do not respond to commands. I alsco can't see any IR flash looking at the leds with a webcam, unlike what happens with "real" remotes.
Any suggestion?

Originally Posted by jumpjack

I connected an IR LED pair to pins 12 and 14 of my phone (see pinout); I tried both with or without the 10 ohm resistor (what is it for?!?), but with no luck, my devices do not respond to commands. I alsco can't see any IR flash looking at the leds with a webcam, unlike what happens with "real" remotes.
Any suggestion?

The Audio OP-AMP of your phone has symmetrical audio outputs, that's why it doesn't work. ( + and - instead of + and ground)



The 10ohms resistor is there to limit peaks on audio output some devices (especially boosted speaker output on PC sound card).

Originally Posted by XianLi

The Audio OP-AMP of your phone has symmetrical audio outputs, that's why it doesn't work. ( + and - instead of + and ground)

So this is the explanation. Does it exist also a solution?

What about this pinout from a different phone?
http://pinouts.ru/CellularPhones-Nok...t_pinout.shtml

Is it suitable?

you can try to connect the LEDs between Left +- and Right +-.

+ and - are connected together.

Originally Posted by jumpjack

What about this pinout from a different phone?
http://pinouts.ru/CellularPhones-Nok...t_pinout.shtml

Is it suitable?

No it is not possible with this one as it provides only one channel (mono) when the IR emitter requires two channels (stereo)

I did a little test with +/- pins joined: although I can't still control any device neither see any "flashing" in the LEDs using a webcam, I tried connecting directly phone output to PC audio input.
I obtained this:

http://img381.imageshack.us/img381/5...pionatope3.gif

Image shows in order:
1 - sampled signal
2 - recreated signal (by hand)
3 - replayed signal (by phone)


For unknown reasons, final part of the signal contains wrong (added?!?) informations! Any idea why?!? I simply played a standard WAV file.