[TriEmbed] IR remote signals

[Shane Trent]

You need more pull-up. Use an external 1k pull-up and you should see the
square waves.

On Tue, Oct 20, 2020 at 8:37 PM The MacDougals via TriEmbed <
triembed at triembed.org> wrote:

> See the attached scope shot…
>
> This is one mark from a SONY remote captured by an LTR-301 IR detector.
>
> https://www.sparkfun.com/datasheets/Components/LTR-301.pdf
>
> I have this device attached to an Arduino Uno and am using INPUT_PULLUP
> (internal pullup on the pin).
>
>
>
> I think that the wiggle on the scope between the cursors is the 40kHz
> modulation of the signal.
>
> The cursors cover 10 wiggles and the scope reports 4.04 kHz.
>
> My question is why is this wiggle of such small magnitude? I was expecting
> to see full voltage swing.
>
> Is it just this particular IR detector?  Is there something in the
> datasheet that would indicate this?
>
>
>
>
>
> ---> Paul
>
>
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-- 
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*Shane D Trent*
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