Hi Neil - In my application placement was not *that* sensitive - either the pair were= completely blocked or were reflecting into a cavity. However, from memory,= the angles of view of the two devices easily accommodated assembly toleran= ces in placement. It would be worth the time to check the geometry for targ= et distance (something that needs doing for an integrated device anyway...) Good luck! Stephen -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of= Neil Sent: Thursday, 29 September 2016 3:11 PM To: Microcontroller discussion list - Public. Subject: Re: [EE] SMD side-looking reflective opto sensor? I'm kinda liking this -- using separate pieces. On the plus side, with separate pieces I can control the angle to work best= with the stripe-patterned part that this will be looking at. But curious = how sensitive it will be to placement tolerances during manufacturing. Wit= h a one-piece unit, a variance in how far it is from the stripe-patterned p= art is already a concern, but I'm wondering how much rotation tolerance it = can handle. Any thoughts on that? FWIW, I'm making effectively a nest-type interface for a product, where the= outer ring becomes the quadrature encoder control knob. Cheers, -Neil. On 9/28/2016 12:04 AM, stephen.forrest@agilent.com wrote: > Discrete LED & photodiode? > I've used Osram SFH325FA with SFH426-Z as a side-looking reflective opto. > 4mm high and <$1 per pair. (SFH4244-Z is the closest that Digikey=20 > have...) > > c/SFH-325-FA-3-4-Z/475-1450-1-ND/1228095> > > c/SFH-325-FA-3-4-Z/475-1450-1-ND/1228095> > > Stephen > > -----Original Message----- > From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On=20 > Behalf Of Neil > Sent: Wednesday, 28 September 2016 10:35 AM > To: Microcontroller discussion list - Public. > Subject: [EE] SMD side-looking reflective opto sensor? > > Well since y'all are bored and missing some action in this group... > > Anyone know of a side-looking relective opto sensor like this ( > http://www.digikey.com/product-search/en?keywords=3Dtcrt1000 ), but SMD? > Shorter (ie: does not stick up as much off the PCB) would be nice also. > This one is 6.1mm high and 4mm would be nice. > > Cheers, > -Neil. > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive=20 > View/change your membership options at=20 > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclis= t --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .