You immediately noticed the main issue with IR receivers- They are
susceptible to interference from other signals. Be SURE to ground the case
and R/C isolate its supply line to keep it quiet...

--Bob


At 04:27 PM 7/30/2003 -0500, you wrote:
>Gee.  What an anticlimactic solution...
>
>I got the IR-receiver samples (Vishay TSOP3848) in recently, and hooked
>one up
>today.  2 power lines, and the output to an oscilloscope.  First thing I
>noticed was a lot of jumpy lines, which adding some bypass caps (on the
>breadboard) did not solve.  However, disabling the other 2 PIC circuits
>running on the board eliminated this noise completely.
>
>So I point my TV remote at it, and all I got was nice clean square wave
>signals.  Sweet!  I noticed that the further away the remote, the more
>erratic the waveform, but this is not a concern for me, as my remote will be
>only a few feet away from the receiver.
>
>All I gotta do now is design/build a 38khz-carrier-wave circuit with some
>different encodings from a few buttons.  A PIC 12F629 should work well for
>this, and should be fairly simple.
>
>Thanks folks,
>-Neil.
>
>
>
>
>On Tuesday 01 July 2003 01:18, Picdude scribbled:
> > Would any of you infrared gurus be kind enough to give me some quick
> > pointers into getting into IR control with a PIC.  I have a simple PIC
> > circuit here for example, that has 2 input pushbuttons, and I'd like to
> > change that to a simple IR control, with the 2 buttons on the IR
> > transmitter (I'm thinking key-fob).
> >
> > Web searching has mostly netted me a bunch of specialized devices for
> > dealing with commercial remote-control standards, which I don't really care
> > for.  I'm thinking that I should be able to read an infrared photo-diode
> > directly with a PIC a/d and use my own protocol (each button signals with a
> > different frequency or pulse-width perhaps).
> >
> > Any ideas if I can achieve this?
> >
> > Thanks,
> > -Neil.
>
>--
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