Home-Brew IR port. Was - Please Ignore RS232 message. The subject should read IrDA port... Sorry

Werner Almesberger werner at openmoko.org
Fri May 11 18:10:07 CEST 2007

Alan Ide wrote:
> Any suggestions, comments, or hate mail are welcome.

Just a few data points:

- IR most remotes use a signal with a 35 kHz or 38 kHz carrier, so
  you would probably want to use a PWM for this

- alas, all the PWM outputs are taken for other things in GTA01Bv4:

- you probably want your remote to be "learning", so you also need
  an input (this also could be connected to the PC, and then you'd
  just copy the codes to the Neo). For this, you probably want a
  sensor with a build-in 35 kHz or 38 kHz bandpass filter. (E.g.,
  a few years ago, I used the IRM8601S. But there are more recent
  and more compact choices as well.)

My circuit from back then (using a PIC microcontroller and doing
everything in software) is here:

- Werner

 / Werner Almesberger, Buenos Aires, Argentina     werner at almesberger.net /

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