On 20.04.17 14:51, Gene Heskett wrote: > The led makers have now had 40+ years to design such a package, and I > fail to understand why it has not happened.
Somewhere near the bottom of my junkbox is an envelope with a pair of Siemens opto-link (real product name long forgotten) devices, which came out around 35 years ago. They're small grey rectangles with through-hole pins, and a fibre entry with ring-nut (like on a collet holder) on one end. Dunno if they're still marketed, though. At Digi-key, this Broadcom offering looks just like one end: https://www.digikey.com/product-detail/en/broadcom-limited/SP000063858/516-2872-ND/2220931 But that would leave the rest of my coil of shielded twisted-pair (for RS485) cable gathering dust. With 7v of permissible common-mode, and differential transmission for noise immunity, what more is really needed? RS485 transceivers are around $2 to $3 IIRC. (I saw some for 25c today, but they were surplus stock of a now obsolete device.) Erik ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
