> > Nice thing about inductive loads is current ramps up and down slowly. > Propblem of > course when there is no flyback diode/suppression. If the inductive load > is on the > circuit board it's somewhat easier to account for. Off board needs a > little more > thought... long wires pick up noise from "outside" and couple back to you= r > 5V, etc. > > Inductive load is off board, up to 4 meters. I make a habit of adding suppression diodes as close as possible to the load (magnetic locks). I have seen designs where they are placed on the board with the customer simply connecting the inductive load without giving it a second thought. Perhaps both is best. Thanks to all. I will get these boards made then bench test and scope the rails etc to see how it all behaves. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .