Return-Path: Received: from [24.25.9.103] (HELO ms-smtp-04-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.3c1) with ESMTP id 744412 for flyrotary@lancaironline.net; Fri, 18 Feb 2005 11:59:31 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-185-127.carolina.rr.com [24.74.185.127]) by ms-smtp-04-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j1IGweCi019568 for ; Fri, 18 Feb 2005 11:58:42 -0500 (EST) Message-ID: <007801c515db$1ce44430$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Digital Fuel Monitoring System Date: Fri, 18 Feb 2005 11:58:47 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0075_01C515B1.33D74DB0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0075_01C515B1.33D74DB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks, Wendell. Nice to get a vote of confidence from someone who has experience. I do = not have a schematic drawn, its done in my head and on the PC board = drawing tool. However, I intend to fix that as I found the PC board SW = I am using also has a schematic drawer which can then guide you to = connecting the correct points on the PC board drawing. Remind me in = about a week or son and I'll be happy to send you the schematic. It took me from May of this year to Dec to finally learn enough to write = the code and program the Microchip - but, someone more familiar with = digital things would probably find it much quicker. I was fortunate to = finally find a Pascal Compiler which was much easier than assembly - = but, I still had to write some embedded assembly code for functions = (mostly math) that the compiler does not yet have, Ugh!. It would be fairly easy (I think) to add a fuel quantity function. The = traditional fuel sender is simply a varying DC voltage which I could = port to one of the A/D pins on the chip and then have a look up table = for what voltage =3D how much fuel. Some of the capacitive fuel = measuring systems are a bit different and they might better to = integrate. Ed ----- Original Message -----=20 From: Wendell Voto=20 To: Rotary motors in aircraft=20 Sent: Friday, February 18, 2005 9:57 AM Subject: [FlyRotary] Re: Digital Fuel Monitoring System Looks good to me, been in electronics for 40 years. I made up a = proto-type digital fuel gauge last summer, didn't make a PCB yet. Mine = is just gal. read out on LEDs. Has a little temp drift but may not need = to worry about it.=20 If you don't mind I'd like a schematic, but I have no way to program a = microprocessor so stay away from them. If you would sell the programmed = processor I might switch to it to have bells and whistles. Wendell Had to borrow the wife's large, lighted sewing magnifying apparatus = - can do alright on the hole-through components, but those surface mount = chips are just too small for old eyes {:>). If the circuit checks out = tomorrow I will apply power and see if I can get the chip programmed. Ed ------=_NextPart_000_0075_01C515B1.33D74DB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Thanks, Wendell.
 
Nice to get a vote of confidence from = someone who=20 has experience.  I do not have a schematic drawn, its done in my = head and=20 on the PC board drawing tool.  However, I intend to fix that as I = found the=20 PC board SW I am using also has a schematic drawer which can then guide = you to=20 connecting the correct points on the PC board drawing.  Remind me = in about=20 a week or son and I'll be happy to send you the schematic.
 
It took me from May of this year to Dec = to finally=20 learn enough to write the code and program the Microchip - but, someone = more=20 familiar with digital things would probably find it much quicker.  = I was=20 fortunate to finally find a Pascal Compiler which was much easier than = assembly=20 - but, I still had to write some embedded assembly code for = functions=20 (mostly math) that the compiler does not yet have, Ugh!.
 
It would be fairly easy (I think) to = add a fuel=20 quantity function.  The traditional fuel sender is simply a varying = DC=20 voltage which I  could port to one of the A/D pins on the chip and = then=20 have a look up table for what voltage =3D how much fuel.  Some of = the=20 capacitive fuel measuring systems are a bit different and they might = better to=20 integrate.
 
Ed
----- Original Message -----
From:=20 Wendell = Voto=20
Sent: Friday, February 18, 2005 = 9:57=20 AM
Subject: [FlyRotary] Re: = Digital Fuel=20 Monitoring System

Looks good to me, been in electronics for = 40=20 years.  I made up a proto-type digital fuel gauge last summer, = didn't=20 make a PCB yet. Mine is just gal. read out on LEDs. Has a little temp = drift=20 but may not need to worry about it.
If you don't mind I'd like a schematic, but = I have no=20 way to program a microprocessor so stay away from them. If you would = sell the=20 programmed processor I might switch to it to have bells and=20 whistles.
Wendell
 
Had to borrow the wife's large, = lighted sewing=20 magnifying apparatus - can do alright on the hole-through = components, but=20 those surface mount chips are just too small for old eyes = {:>).  If=20 the circuit checks out tomorrow I will apply power and see if I can = get the=20 chip programmed.
 
Ed
 
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