Return-Path: Received: from YCC.COM ([204.155.150.41]) by truman.olsusa.com (Post.Office MTA v3.1.2 release (PO203-101c) ID# 0-44819U2500L250S0) with SMTP id AAA10939 for ; Sun, 11 Oct 1998 00:54:10 -0400 Received: from YccPrimaryDomain-Message_Server by YCC.COM with Novell_GroupWise; Sun, 11 Oct 1998 00:00:14 -0500 Message-Id: Date: Wed, 07 Oct 1998 20:54:56 -0500 From: "Bill Gradwohl" To: lancair.list@olsusa.com Subject: Sticking relay contacts Mime-Version: 1.0 Content-Disposition: inline X-Mailing-List: lancair.list@olsusa.com <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> I've read several posts where relay failure caused a considerable amount of grief. In particular, the relay contacts welding closed due to current and arching. Has anyone considered or actually wired up their circuits so that the relay contact simply supplies power to the gate of a HEXFET which requires a minuscule current, and then have the HEXFET trigger the load at the load current? The relay could be any desired arrangement, SPST, SPDT, 4PDT, etc. Each pole is connected to a HEXFET gate and the remaining legs on the HEXFET go to ground and the load. I am asking if anyone has considered it or done it. I am not suggesting doing it. Bill Gradwohl IV-P Builder N858B