Debbie Hynes wrote:
> PICers - i'm looking round for ideas to build an IR modulator cct.
> did a quick google but mostly fopund IR receivers.
>
> I'm using a 16f84 to drive an IR led but i'll need to modulate it at
> 38kbps. i guess i could use a 555 to gate the LED on/off - any other
> ideas?

First, ditch the 16F84.  It's obsolete.

You can have the PIC produce the complete IR signal, carrier and modulation,
if it's got nothing else to do at the time.  I used a 16F630 in a high
volume product to do just that.  It was running off its own internal 4MHz
oscillator.  Worked very well.


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