Gene, The datasheet says logic high when the slot is clear, logic low when interrupted. So sounds like you have no LED. FWIW, 0.8V seems REALLY low for a LED. Typ about 2x that. Esp running @ 25mA. The max reverse led voltage is listed as only 3V. Was it ever hooked up backwards? Could have caused the LED to become a DED (Dark Emitting Diode). ESD can kill them too. Either try another one or shine an IR LED at the receiver side (from a TV remote??) and see if the detector side is good.
Stephen On Mon, Feb 20, 2012 at 5:42 PM, gene heskett <ghesk...@wdtv.com> wrote: > Greetings all; > > I got the next generation of that board done today and populated it. > > This slot type opto device is a Honeywell HOA2001 > ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
