X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from email2k3.itlnet.net ([64.19.112.12] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 1000644 for flyrotary@lancaironline.net; Mon, 27 Feb 2006 19:47:43 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.19.112.12; envelope-from=jwvoto@itlnet.net Received: from rav.itlnet.net (unverified [192.168.10.149]) by itlnet.net (Rockliffe SMTPRA 6.1.22) with SMTP id for ; Mon, 27 Feb 2006 18:46:58 -0600 Received: from JWVOTO (unverified [64.19.117.138]) by itlnet.net (Rockliffe SMTPRA 6.1.22) with ESMTP id for ; Mon, 27 Feb 2006 18:46:56 -0600 Message-ID: <005c01c63c01$c92de5a0$8a751340@JWVOTO> From: "Wendell Voto" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Fire Detector Unit Date: Mon, 27 Feb 2006 18:55:36 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0059_01C63BCF.654DBBA0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 This is a multi-part message in MIME format. ------=_NextPart_000_0059_01C63BCF.654DBBA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ----- Original Message -----=20 From: Mark R Steitle=20 To: Rotary motors in aircraft=20 Sent: Monday, February 27, 2006 8:46 AM Subject: [FlyRotary] Re: Fire Detector Unit If Acroname.com has the inventory on hand (no reason to think otherwise), it looks to be a good source for the UVTRON fire detectors and circuit boards. The question is can it run a good sized LED = without needing a relay board. Output is 50v, so that would have to be dealt with (following Ed's recommendations). So, it appears that a relay board won't be necessary unless you're planning on using a landing = light as a warning indicator. The C3704 is rated for 10 - 30 volts input, = so that eliminates the need for the voltage converter board. They have = two other models if you need a different input voltage. The board would need to be mounted in a project box (readily available at Frye's) with = a window cut for the UVTRON to look through. I used nylon screws from = the Home Depot avionics department to mount the board.=20 From the picture on the Acroname web site, it doesn't appear that the board is protective coated. IMHO, this should be done to improve longevity and reliability. The coating should be available from a number of electronics suppliers, or use something like epoxy resin or E6000. =20 One other caution, the UVtron operates at 350v, so be careful handling it while it is powered up. All in all, it appears the single-board solution would be a more = elegant solution, but would require some experimenting to get it to do what we want. We know that the 3-board solution works as is. So, its up to each to determine which option suits your needs. Since Bob Darrah had indicated he was interested in this item, he's agreed to order one of the boards and we will test it out to see if it will power an LED, and what additional components it needs to make = that happen. I will report back to the group with the good, the bad and = the ugly. =20 Mark =20 I agree that a relay board would not be needed (I didn't even see it = on the web site), however, it appears to me that it only puts out a = single pulse which can be stretched by adding a capacitor. If you = wanted more on time a latching circuit would be needed depending on your = alarm circuitry. An led could be driven off the open collector out put = but on time would be limited by the length of the pulse, hence the need = for a latching circuit. That's the way I see it. Wendell ------=_NextPart_000_0059_01C63BCF.654DBBA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
----- Original Message -----
From:=20 Mark R Steitle =
Sent: Monday, February 27, 2006 = 8:46=20 AM
Subject: [FlyRotary] Re: Fire = Detector=20 Unit

If Acroname.com has the inventory on hand (no reason to=20 think
otherwise), it looks to be a good source for the UVTRON fire=20 detectors
and circuit boards.  The question is can it run a = good sized=20 LED without
needing a relay board.  Output is 50v, so that = would have=20 to be dealt
with (following Ed's recommendations).  So, it = appears=20 that a relay
board won't be necessary unless you're planning on = using a=20 landing light
as a warning indicator.  The C3704 is rated for = 10 - 30=20 volts input, so
that eliminates the need for the voltage converter=20 board.  They have two
other models if you need a different = input=20 voltage.  The board would
need to be mounted in a project box = (readily=20 available at Frye's) with a
window cut for the UVTRON to look=20 through.  I used nylon screws from the
Home Depot avionics = department=20 to mount the board.

From the picture on the Acroname web site, = it=20 doesn't appear that the
board is protective coated.  IMHO, = this should=20 be done to improve
longevity and reliability.  The coating = should be=20 available from a
number of electronics suppliers, or use something = like=20 epoxy resin or
E6000. 

One other caution, the UVtron = operates=20 at 350v, so be careful handling
it while it is powered = up.

All in=20 all, it appears the single-board solution would be a more = elegant
solution,=20 but would require some experimenting to get it to do what = we
want.  We=20 know that the 3-board solution works as is.  So, its up = to
each to=20 determine which option suits your needs.

Since Bob Darrah had = indicated=20 he was interested in this item, he's
agreed to order one of the = boards and=20 we will test it out to see if it
will power an LED, and what = additional=20 components it needs to make that
happen.  I will report back = to the=20 group with the good, the bad and the
ugly. =20

Mark
   
I agree = that a=20 relay board would not be needed (I didn't even see it on the web = site),=20 however, it appears to me that it only puts out a single pulse which = can be=20 stretched by adding a capacitor.  If you wanted more on time a = latching=20 circuit would be needed depending on your alarm circuitry. An led = could be=20 driven off the open collector out put but on time would be limited by = the=20 length of the pulse, hence the need for a latching circuit.  = That's the=20 way I see it.
Wendell
 
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