Why not SPI speeds over a long cable? Gigabit Ether net is a good example. It is built into almost all computers and can be 1GHz over 100 meters of cheap unshielded wire.
They use only a few basic tricks, none of which add much to the cost 10/8 encoding to guarantee a minimum number of bit transitions even if the data is a long string of zeroes. Clock mixed with data so the receiver clock can be cheap non-precision Differential to resister common mode noise galvanic isolation to prevent ground loops There is also 10GHz Ethernet but it is not built into common consumer equipment but even 10G data rates are easy to pushover 100 feet using just RJ45 jacks The trick is to NOT think about how hard it is to push 10Gbps over a wire. But to think how easy it is to build a microwave data link when you can use wire in place of a clear air path. No need for antennas and you can use way ultra-low power. even for the case of SPI, think in terms is radio transmission lines and the job becomes easier. On Mon, Sep 11, 2017 at 9:54 AM, Nicklas Karlsson < [email protected]> wrote: > > On Monday 11 September 2017 07:16:00 theman whosoldtheworld wrote: > > > > > why not powerlink ie? > > > > Wikipedia description shows some promise. SPI speeds over a longer cable, > > maybe. > > No SPI over long cable. For long cable RS422 will work, there is a > tradeoff between cable length and speed. > > ------------------------------------------------------------ > ------------------ > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
