X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 18 Jan 2010 08:45:00 -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 4085203 for lml@lancaironline.net; Sat, 16 Jan 2010 18:24:56 -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 o0GNOJVo004804 for ; Sat, 16 Jan 2010 16:24:19 -0700 X-Original-Message-ID: <4B524AA3.70900@lm50.com> X-Original-Date: Sat, 16 Jan 2010 15:24:19 -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 Good catch. I saw the promotional pictures that showed all the LEDs on and calculated that case. Having only one LED on at a time raises some serious user interface issues. My bad for expecting more from the user interface. You are right, it is all in the details -- all the details. Regards, Hamid Wolfgang wrote: > After closer examination of the AoA display circuit from > http://www.barkeraircraft.com/files/AOA_rDisplay.pdf, it appears that > pin 9 of the LM3914 is left open. > > That means the device is running in the dot mode, only one led at a > time is illuminated, rendering all over heating questions moot. > > It's all in the details . . . . > > Wolfgang >