On Wed, 12 Nov 1997, : Cassie Carstens wrote: > My PIC based alarm system have been blown up with a High Voltage.. > Short of using screen cable for every sensor, is there other devices > or goodies that can protect alarm systems from this assult???? PTM: Optics: take half a meter rod of dry air. Make separated powerfeeds to both ends and hope for the best. Make the logic work so that light is pulsating when everything is OK. Hi voltage destroys just about every electronic device. (I been working with rgt devices just enough) -------------------------------------------------------------------------- PTM, pasi.mustalahti@utu.fi, ptmusta@utu.fi, http://www.utu.fi/~ptmusta Lab.ins. (mikrotuki) ATK-keskus/Mat.Luon.Tdk OH1HEK Lab.engineer (PC support) Computer Center OI7234 Mail: Turun Yliopisto / Fysla, Vesilinnantie 5, 20014 Pt 02-3336669, FAX 02-3335632 (Pk 02-2387010, NMT 049-555577) --------------------------------------------------------------------------