---- START NEW MESSAGE --- Received: from cherry.ease.lsoft.com [209.119.0.109] by dpmail10.doteasy.com with ESMTP (SMTPD32-8.05) id AB8B2E6B0116; Thu, 29 Jan 2004 20:20:27 -0800 Received: from PEAR.EASE.LSOFT.COM (209.119.0.19) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <18.00CC3E6A@cherry.ease.lsoft.com>; Thu, 29 Jan 2004 23:20:18 -0500 Received: from MITVMA.MIT.EDU by MITVMA.MIT.EDU (LISTSERV-TCP/IP release 1.8e) with spool id 9283 for PICLIST@MITVMA.MIT.EDU; Thu, 29 Jan 2004 23:20:12 -0500 Received: from MITVMA (NJE origin SMTP@MITVMA) by MITVMA.MIT.EDU (LMail V1.2d/1.8d) with BSMTP id 4714; Thu, 29 Jan 2004 23:19:54 -0500 Received: from mailhub-3.iastate.edu [129.186.140.13] by mitvma.mit.edu (IBM VM SMTP Level 430) via TCP with ESMTP ; Thu, 29 Jan 2004 23:19:54 EST X-Comment: mitvma.mit.edu: Mail was sent by mailhub-3.iastate.edu Received: from mailout-1.iastate.edu (mailout-1.iastate.edu [129.186.140.1]) by mailhub-3.iastate.edu (8.12.10/8.12.10) with SMTP id i0U4Jurr017972 for ; Thu, 29 Jan 2004 22:19:56 -0600 Received: from hike.student.iastate.edu(65.110.233.166) by mailout-1.iastate.edu via csmap id fbaf9494_52db_11d8_9dff_003048290bef_10715; Thu, 29 Jan 2004 22:22:58 -0600 (CST) References: <20040129215352.735cee92.sunkist@iastate.edu> <4019D786.2030107@audiovisualdevices.com.au> X-Mailer: Sylpheed version 0.9.0claws (GTK+ 1.2.10; i486-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Message-ID: <20040129221837.5e45b6c4.sunkist@iastate.edu> Date: Thu, 29 Jan 2004 22:18:37 -0600 Reply-To: pic microcontroller discussion list Sender: pic microcontroller discussion list From: Eric Christensen Subject: Re: [EE]: High current PCB To: PICLIST@MITVMA.MIT.EDU In-Reply-To: <4019D786.2030107@audiovisualdevices.com.au> Precedence: list X-RCPT-TO: Status: U X-UIDL: 371856427 On Fri, 30 Jan 2004 14:03:18 +1000 David Duffy wrote: > Eric Christensen wrote: > > >Background: > > > >A friend of mine is building a dual battery system for his custom off-road > >truck. His truck has a somewhat hard-starting chevy 350 engine and a > >failure-prone electrical system. He wants to have a second battery that is > >not normally connected to the system so that it won't be run dead in an > >electrical failure. He then wants to be able to connect either battery to > >the engine individually or both in parallel. > > > > > > Probably not what you want to hear but... > Why can't he just use a really heavy duty switch? > David... He would like to use the high-power MOSFETs so that he doesn't have to deal with arcing destroying the contacts of the switch. When the 2 batteries are connected in parallel, there will likely be a big current flow. Also, many of the automotive battery cutoff switches are only rated for a a couple hundred amps. Eric > > -- > ___________________________________________ > David Duffy Audio Visual Devices P/L > U8, 9-11 Trade St, Cleveland 4163 Australia > Ph: +61 7 38210362 Fax: +61 7 38210281 > New Web: www.audiovisualdevices.com.au > ___________________________________________ > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details. . Return-Path: <> Received: from mitvma.mit.edu ([18.92.0.3]) by tomts37-srv.bellnexxia.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with ESMTP id <20040128150522.TMLN8220.tomts37-srv.bellnexxia.net@mitvma.mit.edu> for ; Wed, 28 Jan 2004 10:05:22 -0500 Received: by mitvma.mit.edu (IBM VM SMTP Level 430) via spool with SMTP id 6727 ; Wed, 28 Jan 2004 10:05:18 EST Received: from MITVMA.MIT.EDU (NJE origin LISTSERV@MITVMA) by MITVMA.MIT.EDU (LMail V1.2d/1.8d) with BSMTP id 4117; Wed, 28 Jan 2004 10:05:19 -0500 Date: Wed, 28 Jan 2004 10:05:19 -0500 From: "L-Soft list server at MITVMA.MIT.EDU (1.8e)" Subject: PICLIST: error report from NT.MASSMIND.ORG To: listsjosh@3MTMP.COM, "For Blackholeeclipse@Earthlink.Net" Message-ID: X-LSV-ListID: None The enclosed message has been identified as a delivery error for the PICLIST list because it was sent to 'owner-piclist@MITVMA.MIT.EDU'. ------------------------------ Message in error ------------------------------- Received: from MITVMA (NJE origin SMTP@MITVMA) by MITVMA.MIT.EDU (LMail V1.2d/1.8d) with BSMTP id 4115; Wed, 28 Jan 2004 10:05:19 -0500 Received: from nt.massmind.org [66.13.172.18] by mitvma.mit.edu (IBM VM SMTP Level 430) via TCP with SMTP ; Wed, 28 Jan 2004 10:05:18 EST X-Comment: mitvma.mit.edu: Mail was sent by nt.massmind.org To: owner-piclist@MITVMA.MIT.EDU From: Mail Administrator Reply-To: Mail Administrator Subject: Mail System Error - Returned Mail Date: Wed, 28 Jan 2004 06:54:55 -0800 Message-ID: <20040128145455087.AAE388@nt.massmind.org> MIME-Version: 1.0 Content-Type: multipart/mixed; Boundary="===========================_ _= 4087219(388)" Content-Transfer-Encoding: 7BIT --===========================_ _= 4087219(388) Content-Type: text/plain This Message was undeliverable due to the following reason: This message passed through a number of mail servers greater than the maximum number specified in the Maximum MTA Hops field. 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Maximum Hops: 15 Please reply to Postmaster@nt.massmind.org if you feel this message to be in error. --===========================_ _= 4087219(388) Content-Type: message/rfc822 Received: from cherry.ease.lsoft.com ([209.119.0.109]) by nt.massmind.org (Post.Office MTA v3.5.3 release 223 ID# 0-12345L500S10000V35) with ESMTP id org for ; Fri, 23 Jan 2004 06:37:36 -0800 Received: from PEAR.EASE.LSOFT.COM (209.119.0.19) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <15.00CB2E61@cherry.ease.lsoft.com>; Fri, 23 Jan 2004 9:39:26 -0500 Received: from MITVMA.MIT.EDU by MITVMA.MIT.EDU (LISTSERV-TCP/IP release 1.8e) with spool id 4427 for PICLIST@MITVMA.MIT.EDU; Fri, 23 Jan 2004 09:39:18 -0500 Received: from MITVMA (NJE origin SMTP@MITVMA) by MITVMA.MIT.EDU (LMail V1.2d/1.8d) with BSMTP id 4804; Fri, 23 Jan 2004 09:37:37 -0500 Received: from audiomind.dk [213.237.88.238] by mitvma.mit.edu (IBM VM SMTP Level 430) via TCP with ESMTP ; Fri, 23 Jan 2004 09:37:36 EST Received: from winbox.Audiomind.local (192.168.2.3:8121) by audiomind.dk with [XMail 1.16 (Linux/Ix86) ESMTP Server] id for from ; Fri, 23 Jan 2004 15:26:04 +0100 Received: from mail pickup service by winbox.Audiomind.local with Microsoft SMTPSVC; Fri, 23 Jan 2004 15:25:16 +0100 Received: from audiomind.dk ([192.168.2.6]) by winbox.intra.audiomind.dk with Microsoft SMTPSVC(6.0.3790.0); Tue, 20 Jan 2004 12:20:19 +0100 Received: from cherry.ease.lsoft.com (209.119.0.109:4066) by audiomind.dk with [XMail 1.16 (Linux/Ix86) ESMTP Server] id for from ; Mon, 19 Jan 2004 18:30:18 +0100 Received: from PEAR.EASE.LSOFT.COM (209.119.0.19) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <9.00CAB703@cherry.ease.lsoft.com>; Mon, 19 Jan 2004 12:30:11 -0500 Received: from MITVMA.MIT.EDU by MITVMA.MIT.EDU (LISTSERV-TCP/IP release 1.8e) with spool id 1590 for PICLIST@MITVMA.MIT.EDU; Mon, 19 Jan 2004 12:30:06 -0500 Received: from MITVMA (NJE origin SMTP@MITVMA) by MITVMA.MIT.EDU (LMail V1.2d/1.8d) with BSMTP id 0921; Mon, 19 Jan 2004 12:28:12 -0500 Received: from mail3.tpgi.com.au [203.12.160.59] by mitvma.mit.edu (IBM VM SMTP Level 430) via TCP with ESMTP ; Mon, 19 Jan 2004 12:28:11 EST Received: from alpha.office.concisesystems.com.au (203-219-104-202-nsw.tpgi.com.au [203.219.104.202]) by mail3.tpgi.com.au (8.11.6/8.11.6) with ESMTP id i0JHS6O14447 for ; Tue, 20 Jan 2004 04:28:08 +1100 Received: from beta.kit.net.au (c211-30-105-105.carlnfd1.nsw.optusnet.com.au [211.30.105.105]) by alpha.office.concisesystems.com.au (8.9.3/8.9.3) with ESMTP id FAA25831 for ; Tue, 20 Jan 2004 05:07:37 +1100 (EST) (envelope-from piclist@outeredge.net) Received: from alpha.kit.net.au (kit.net.au [203.35.197.33]) by beta.kit.net.au (8.9.3/8.9.3) with ESMTP id EAA09032 for ; Tue, 20 Jan 2004 04:29:15 +1100 (EST) (envelope-from piclist@outeredge.net) Received: (from amavis@localhost) by alpha.kit.net.au (8.9.3/8.9.3) id EAA17763 for piclist@mitvma.mit.edu; Tue, 20 Jan 2004 04:29:43 +1100 (EST) (envelope-from piclist@outeredge.net) Received: from officepc (lanroverp4.kit.net.au [203.35.197.54]) by alpha.kit.net.au (8.9.3/8.9.3) with SMTP id EAA17755 for ; Tue, 20 Jan 2004 04:29:40 +1100 (EST) (envelope-from piclist@outeredge.net) X-Comment: mitvma.mit.edu: Mail was sent by audiomind.dk X-Comment: mitvma.mit.edu: Mail was sent by mail3.tpgi.com.au X-AV-Scanned: yes e2420de2ca09034c8a4e312b1ee08933 X-AV-Scanned: yes 8968d3c90ddd46d6fe7b21788ffa4338 X-Deliver-To: soren@audiomind.dk MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal X-Virus-Scanned: by Keep In Touch Computers Precedence: list X-OriginalArrivalTime: 20 Jan 2004 11:20:30.0966 (UTC) FILETIME=[69F23960:01C3DF47] Message-ID: Date: Tue, 20 Jan 2004 04:36:44 +1100 Reply-To: pic microcontroller discussion list Sender: pic microcontroller discussion list From: Jonathan Johnson Subject: Re: [EE]:loading a power supply for testing purposes To: PICLIST@MITVMA.MIT.EDU In-Reply-To: A wirewound rheostat should do the job, you can get these in large wattages. Cheers JJ -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of al smith Sent: Tuesday, 20 January 2004 4:14 AM To: PICLIST@MITVMA.MIT.EDU Subject: [EE]:loading a power supply for testing purposes I have a couple of power supplies that I want to create a test jig for, and to simulate a load. What we are talking about is 40A @2.5V and 10A @1.25V, so putting a resistor(s) out there might not be the best solution. Any ideas? _________________________________________________________________ Let the new MSN Premium Internet Software make the most of your high-speed experience. http://join.msn.com/?pgmarket=en-us&page=byoa/prem&ST=1 -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com hint: The PICList is archived three different ways. 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