In other words you just need long distance opto-isolators.
On Saturday, April 22, 2017, 2:06:53 PM MDT, Gene Heskett <ghesk...@shentel.net> wrote: Gee I wish I could convince folks I do NOT need a serial signal at such and such a baud rate. ALL I want to do is turn on an led shining into the fiber at one end, and detect it with a high gain phototransistor at the other end. Seems pretty simple to me. Turn on the led shining into the end of the fiber for 3 u-secs, the phototransistor does a turnon at the other end, and voila! a step pulse, with no noise being shoved into the circuit on either end. Leave another led turned on for the duration of the dir signal when I want to reverse the direction. rs-422-485 gismos I have a bag of 5, still haven't found a place to put them other than hanging on the end of a usb extension cable as a pretty, lights up bright red so I can pick my way out of the garage if the overhead lighting breaker fails. I was going to use one to drive my vfd, till I found the fake vfd didn't didn't have any seriel circuitry, not even designed in but un-populated on its boards. A SpinX1 runs it rather nicely after I programmed it from its own keypad. ------------------------------------------------------------------------------ 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
