Also, AFAIK IR remote controls more often operate with a carrier frequency
of 38kHz rather than 40kHz. Certainly both frequencies along with a few
others are used in IR remote applications, but I think the 38kHz is more
popular. I could be wrong.

Philips is 36, Sony and a few others 38. I don't know who uses 40. But
the bandfilters are not *that* narrow, a 38 will work reasonably well
with a 36 or a 40.


Wouter van Ooijen

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