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 < [email protected]> 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 > > > _______________________________________________ > Triangle, NC Embedded Computing mailing list > > To post message: [email protected] > List info: http://mail.triembed.org/mailman/listinfo/triembed_triembed.org > TriEmbed web site: http://TriEmbed.org > To unsubscribe, click link and send a blank message: mailto: > [email protected]?subject=unsubscribe > > -- [image: photo] *Shane D Trent* Patent Agent 919-348-0061 | [email protected] ShaneTrent.com | Skype: skype:shane.trent1 <#SignatureSanitizer_SafeHtmlFilter_> Raleigh, North Carolina <http://www.linkedin.com/in/shanetrent> <http://twitter.com/sdtrent> Create your own WiseStamp email signature <https://www.wisestamp.com/signature-in-email/?utm_source=promotion&utm_medium=signature&utm_campaign=create_your_own&srcid=5623268815667200>
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