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Any idea on how to do this?


#1

Hello guys,
Can any of you experts tell me how can i create something similar to the adapter that plugs into the headphone jack???

I mean how do they transfer the signal from the audio jack to the rf for example and vice versa.

Edit: direct link to he image

Concentration on the small adapter please…
Please share Any guidance, link, name of the technology, anything that can help…

Thanks…
Jay


#2

If I were doing it I would treat it like a modem. High tone is a one and low tone is a zero serial data.


#3

Thanks guys,

I’m more interested in knowing how to capture the signal from the audio jack and transform it to something else not necessarily IR, and vice versa…


#4

The audio is nothing more than an AC voltage at different amplitudes and frequency.


#5

@ Cowboy Exactly. ADC the wave.

@ Jay Jay - I was looking at this project on KS the other way. He is controlling his printer through audio jack.

Check the “How does the Peachy Printer work” video.


#6

Thanks again everyone, so i should look into, a chip or something that converts voltage to byte and vice versa…???

Thanks …


#7

Hi, i check it out but couldn’t find anything explaining how it works…


#8

Found it :slight_smile:
http://www.creativedistraction.com/demos/sensor-data-to-iphone-through-the-headphone-jack-using-arduino/


#9

PLL work to decode tones:

Something like this might get you going: