> I am designing a device that can learn remote controls in the field,
> optimally without a PC.  I am interested in an IR learner that would
> analyze and encode IR signals, and make those results available to a
> microcontroller so that we could reproduce the code.  Has anyone seen
> such a component or device, or worked towards that end?

I designed something like this for a client a few years back. Can't
help with code or too much information but I don't recall it being too
difficult. I used a 16F84 and used the fact that the remote sent the
data several times. First determine the carrier frequency (there
were only a couple of values) and save that information. Then
determine the minimum useful bit time and then sample at that rate
to create a bitstream which is stored. No effort was made to
decode it as the remote just had to regurgitate the bitstream.
IIRC, there was one system that toggled a bit with each send and
one (Sky TV) that used a baseband method. I think all the
consumer ones we tried worked.

It's not an 'off the shelf' solution but knowing that it is possible and
the general method is a big step forward.

Steve.

======================================================
Steve Baldwin                Electronic Product Design
TLA Microsystems Ltd         Microcontroller Specialists
PO Box 15-680, New Lynn      http://www.tla.co.nz
Auckland, New Zealand        ph  +64 9 820-2221
email: steveb@tla.co.nz      fax +64 9 820-1929
======================================================

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