X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 14 Jan 2010 08:01:03 -0500 Message-ID: X-Original-Return-Path: Received: from jrcda.com ([206.130.116.53] verified) by logan.com (CommuniGate Pro SMTP 5.3.1) with ESMTPS id 4081686 for lml@lancaironline.net; Wed, 13 Jan 2010 17:09:09 -0500 Received-SPF: none receiver=logan.com; client-ip=206.130.116.53; envelope-from=hwasti@lm50.com Received: from [192.168.1.100] (207-170-226-183.static.twtelecom.net [207.170.226.183]) (authenticated bits=0) by jrcda.com (8.13.1/8.13.1) with ESMTP id o0DM8Xdu031882 for ; Wed, 13 Jan 2010 15:08:33 -0700 X-Original-Message-ID: <4B4E445F.9010003@lm50.com> X-Original-Date: Wed, 13 Jan 2010 14:08:31 -0800 From: Hamid Wasti User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 X-Original-To: Lancair Mailing List Subject: Re: [LML] Re: Do-it-yourself AOA Project References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Wolfgang wrote: > I had not looked at the schematics....... That much was very obvious. > With a 100C limit,an ambient of 40C... Let me offer some advice from my years of doing electronics for airplanes. You are being dangerously optimistic if you think that the area behind your panel will only go up to 40C. Think 55C, maybe even a bit higher. > A simple solution would be to have the 5V regulator with a heat sink > feed the LED's. . . . . what I /assumed/ in the first place. > > I like offering a fix rather than just crtiticism. "Fixes" without actually looking at and understanding what you are fixing, do noting to fix the problem -- they just undermine your credibility. Regards, Hamid