Dario Greggio wrote: > Bob Axtell wrote: > > >> If you use the ST485EB, it will protect the network from ESD spikes. >> > Thank you Bob, I used to place Varistors on 485 side. > I'll get some samples of it. > > I used to, also, but these suppressors are almost free... Mouser has 'em in DIP8 form (I don't use SOIC8, because these NEED to be replaced occasionally...). --Bob -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist