Same deal using a leaf blower to push a string with a plastic grocery bag o= n the end. :-) > >Fun tip for running line via PVC pipe, even long runs like 150meters. > Get some pull line, attack a plastic bag on the end and put at the >entrance. Go to the other end and use a shop vac, it'll pull the bag >and pull line all the way cleanly. > >Hope this helps in some ways. >-Josh > >On Sat, May 16, 2015 at 1:39 PM, Harold Hallikainen > wrote: >> I'm working on an application where contact closures will be sensed by a >> PIC inside a building, but the contacts are outside (perhaps tens of >> meters away). What sort of protection for the inputs is suggested? What >> sort of protection is required by regulatory standards for equipment >> connecting to outside wiring? The outside wiring would likely be buried, >> but lightning could still induce currents into buried cables. Opto >> couplers are one way to get the isolation, but then you have to power th= e >> LEDs with an isolated supply. Ideas? >> >> Thanks! >> >> Harold >> >> >> >> -- >> FCC Rules Updated Daily at http://www.hallikainen.com - Advertising >> opportunities available! >> Not sent from an iPhone. >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >--=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 --=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 .