Communicating with an Arduino that is relatively far away

Graynomad:

the slash after the name or the "overscore"

Also the small circle on the graphic, on chips that means an active low or inverted signal.

Just some notes about schematic layout.

If you mirror image the remote chip the drawing will be a lot clearer.

When things are tied to power rails it's almost always better (clearer) to have VCC going up and GND going down. Your caps go up.

Most beginners make a real dog's breakfast by running the GND wire to every possible place. You haven't done that which is good, in this case however I would argue that because these chips are physically remote from each other you should draw the GND line between the two to reinforce that they have to have a common GND and that that is formed by a GND wire in the cable.


Rob

Actually these don't require a common ground between the local and remote chips, that is one of the advantages of the A/B signals being a true differential signal pair. I'm sure some will disagree with this, but I would say hold off until you actually test such a link using independent power sources at each end, it will continue to work without a common ground wire between the pair.

Lefty