Funny you should say that... I am working with the customer (who's=20 handling the physical design) to see if we can change the reflective=20 "teeth" to comb-like teeth so the emitter and receiver can be placed on=20 opposite side, as for the reflective version, the texture of the teeth=20 would play a part. Those teeth are being injection molded. Cheers, -Neil. On 10/2/2016 5:21 PM, stephen.forrest@agilent.com wrote: > Hi Neil - > > In my application placement was not *that* sensitive - either the pair we= re completely blocked or were reflecting into a cavity. However, from memor= y, the angles of view of the two devices easily accommodated assembly toler= ances in placement. It would be worth the time to check the geometry for ta= rget 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 be= st with the stripe-patterned part that this will be looking at. But curiou= s how sensitive it will be to placement tolerances during manufacturing. W= ith a one-piece unit, a variance in how far it is from the stripe-patterned= part is already a concern, but I'm wondering how much rotation tolerance i= t can handle. Any thoughts on that? > > FWIW, I'm making effectively a nest-type interface for a product, where t= he 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 >> 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 >> 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 >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/cha= nge your membership options at http://mailman.mit.edu/mailman/listinfo/picl= ist > --=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 .