X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from rwcrmhc11.comcast.net ([216.148.227.151] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 997784 for flyrotary@lancaironline.net; Sat, 25 Feb 2006 09:56:29 -0500 Received-SPF: none receiver=logan.com; client-ip=216.148.227.151; envelope-from=rlwhite@comcast.net Received: from Quail (c-68-35-160-229.hsd1.nm.comcast.net[68.35.160.229]) by comcast.net (rwcrmhc11) with SMTP id <20060225145543m11009u1o6e>; Sat, 25 Feb 2006 14:55:43 +0000 Date: Sat, 25 Feb 2006 07:56:19 -0700 From: Bob White To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Fire Detector Unit Message-Id: <20060225075619.d0561117.rlwhite@comcast.net> In-Reply-To: References: X-Mailer: Sylpheed version 2.2.0 (GTK+ 2.8.3; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Sat, 25 Feb 2006 07:04:37 -0500 Chad Robinson wrote: > Tracy Hallock wrote: > > > > After seeing Mark's demonstration, I was pretty impressed, so I did a > > search on the internet for similar products. The link below looked > > promising: > > > > http://www.georgejenson.com/rv7.php > > > > They include a board and the detector for $72. Unfortunately, I am too > > far off from needing this yet, but someone else might like to experiment. > > Tracy, did you mean to include this link as opposed to the one above? > http://www.acroname.com/robotics/parts/R67-UVTRON.html > > This is a good way to go if you're serious about using this detector. It runs > on 10-30VDC, and you can get a project box from Radio Shack for a few bucks > that will fit it. > > Note that if you want to use this, you will need some way to indicate its > output. A good way would be a 12V relay, light, and buzzer, also from Radio > Shack. You'd hook the relay to "output pin 3 - Open Collector Output", and use > it to drive the indicator light (or LED) and the buzzer. Make sure the coil > rating of the relay you get doesn't exceed 100mA at 12V (coil resistance 120 > ohms max). *** Make that 120 ohms MIN. More ohms, less current. :) Bob W. > > Finally, the output of this thing is a very short pulse. The spec sheet for > the driver circuit says you can add a capacitor at a spot on the circuit > board. Again, Radio Shack sells capacitors. A 1uF value across the Cx > terminals will make the output pulse for 1 second at a time. Don't forget to > jumper the "background cancel level" terminals, too. Looks like you'd want to > use position 3 - they label this "general use". You can experiment with a > different slot if it's falsely triggering. > > Sounds like a lot of hookup work, but you could probably do it (minus wiring > and installing it) in 20 minutes. I'm just trying to be detailed. =) > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ -- http://www.bob-white.com N93BD - Rotary Powered BD-4 (first engine start 1/7/06) Custom Cables for your rotary installation - http://www.roblinphoto.com/shop/