Any idea on how to do this?

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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

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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:

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9

PLL work to decode tones:

Something like this might get you going: