---- START NEW MESSAGE --- Received: from cherry.ease.lsoft.com [209.119.0.109] by dpmail10.doteasy.com with ESMTP (SMTPD32-8.05) id AFAE31010116; Thu, 29 Jan 2004 22:54:38 -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 <22.00CC43F9@cherry.ease.lsoft.com>; Fri, 30 Jan 2004 1:54:26 -0500 Received: from MITVMA.MIT.EDU by MITVMA.MIT.EDU (LISTSERV-TCP/IP release 1.8e) with spool id 1739 for PICLIST@MITVMA.MIT.EDU; Fri, 30 Jan 2004 01:54:17 -0500 Received: from MITVMA (NJE origin SMTP@MITVMA) by MITVMA.MIT.EDU (LMail V1.2d/1.8d) with BSMTP id 8276; Fri, 30 Jan 2004 01:53:50 -0500 Received: from mail007.syd.optusnet.com.au [211.29.132.55] by mitvma.mit.edu (IBM VM SMTP Level 430) via TCP with ESMTP ; Fri, 30 Jan 2004 01:53:49 EST X-Comment: mitvma.mit.edu: Mail was sent by mail007.syd.optusnet.com.au Received: from jake (c211-30-161-191.farfl1.nsw.optusnet.com.au [211.30.161.191]) by mail007.syd.optusnet.com.au (8.11.6p2/8.11.6) with SMTP id i0U6rnQ28694 for ; Fri, 30 Jan 2004 17:53:50 +1100 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal Message-ID: Date: Fri, 30 Jan 2004 17:55:05 +1000 Reply-To: pic microcontroller discussion list Sender: pic microcontroller discussion list From: Jake Anderson Subject: Re: [EE]: High current PCB To: PICLIST@MITVMA.MIT.EDU In-Reply-To: <20040129224750.191b1981.sunkist@iastate.edu> Precedence: list X-RCPT-TO: Status: U X-UIDL: 371856451 well to stop the arcing dont switch it while starting or under heavy load? > -----Original Message----- > From: pic microcontroller discussion list > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Eric Christensen > Sent: Friday, 30 January 2004 2:48 PM > To: PICLIST@MITVMA.MIT.EDU > Subject: Re: [EE]: High current PCB > > > Yeah, > > He's looked at several commercially available dual-battery > systems and a variety > of relays/contactors. Many of the commercially available systems > he saw were > only rated for a 100 to 200 amps, and he wants to stay away from an > electro-mechanical setup that could be prone to arcing damage. > > Also, this is a project vehicle, so even if building a custom dual-battery > system may not be the most practical choice, this is a one off > project that is > kind of neat. It also gives him the flexibility to build it to his own > specifications, if he can find a way to easily and reliably > connect the MOSFETs > :) > > Eric > > > > On Thu, 29 Jan 2004 20:33:30 -0800 > Bob Blick wrote: > > > On 29 Jan 2004 at 21:53, Eric Christensen wrote: > > > 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. > > > He has worked out the circuit using several high power > MOSFETs in parallel, > > > but does not know how to connect them. > > > > Normally this is done with a couple of continuous-duty solenoids, > > available at most auto-or-truck parts stores. > > > > I don't mean to discourage the MOSFET approach, but it may prove to > > be a fussy design, and prone to exciting failure especially if the gate > > drive gets to oscillatin' > > > > Cheerful regards, > > > > Bob > > > > -- > > 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. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body .