Hi Hans,
20 years ago I would have suggested using DTMF, but the decoder chips are rare
these days...
PIC controllers include various peripherals which can be used to encode and
decode DC-free signals (which, apart from the frequency below, say, 10kHz, is
the requirement to be recorded as audio). On/off keying or frequency shift
keying are the easiest, I think. Which chips are you going to use?
Greets,Kiste
Am Mittwoch, 23. Februar 2022, 09:15:43 MEZ hat hans
<[email protected]> Folgendes geschrieben:
Hello everyone,
I have been trying for a long time to place a serial signal on one track of an
audio recording which I can read afterwards. To make all kinds of things happen
at the same time as the audio is played. I have now tried to do this with the
old modem system ( TCM3105) but it failed hopelessly. I read that there are
also systems to do this using PWM. Does anyone have an idea?
regardsHans
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