Today's Message Index:
----------------------
1. 08:15 AM - PWM Signal to 0-5v Voltage Converter (Mark Steitle)
2. 08:28 AM - Re: PWM Signal to 0-5v Voltage Converter (Trampas)
3. 10:23 AM - Re: PWM Signal to 0-5v Voltage Converter (John Schroeder)
4. 10:47 AM - Re: PWM Signal to 0-5v Voltage Converter (Mark Steitle)
5. 01:27 PM - Re: Suggestions for software to create simple wiring diagrams (Greg Reid)
6. 04:03 PM - Re: Re: Suggestions for software to create simple (Tim Coldenhoff)
7. 08:07 PM - Location of GPS antenna (PeterHunt1@aol.com)
8. 08:26 PM - Bob at Oshkosh (Don Boardman)
Message 1
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| Subject: | PWM Signal to 0-5v Voltage Converter |
--> AeroElectric-List message posted by: Mark Steitle <msteitle@mail.utexas.edu>
>
>Does anyone know where I can get a converter that takes a 5v pwm signal
>and converts it to 0-5v output. The purpose is to convert the output
>signal from my Electronics Int'l. capacitive fuel probes to a signal that
>my BMA EFIS can understand. I figure there ought to be a simple circuit
>somewhere that will do this, but I haven't been able to find it. I feel
>confident that I could assemble such a device, but its beyond me to design
>such a circuit from scratch.
>
>Thanks,
>Mark S.
Message 2
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| Subject: | PWM Signal to 0-5v Voltage Converter |
--> AeroElectric-List message posted by: "Trampas" <tstern@nc.rr.com>
Mark,
My understanding is that the EI probes output a 5V frequency signal which is
around 2Khz and the frequency varies with the fuel level. I think BMA can
accept a frequency input to their device, thus making the interfacing simple
as hooking it up.
Regards,
Trampas Stern
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Mark
Steitle
Subject: AeroElectric-List: PWM Signal to 0-5v Voltage Converter
--> AeroElectric-List message posted by: Mark Steitle
<msteitle@mail.utexas.edu>
>
>Does anyone know where I can get a converter that takes a 5v pwm signal
>and converts it to 0-5v output. The purpose is to convert the output
>signal from my Electronics Int'l. capacitive fuel probes to a signal that
>my BMA EFIS can understand. I figure there ought to be a simple circuit
>somewhere that will do this, but I haven't been able to find it. I feel
>confident that I could assemble such a device, but its beyond me to design
>such a circuit from scratch.
>
>Thanks,
>Mark S.
Message 3
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| Subject: | Re: PWM Signal to 0-5v Voltage Converter |
--> AeroElectric-List message posted by: "John Schroeder" <jschroeder@perigee.net>
Mark -
Contact Todd Stehouwer at Princeton Electronics. He makes converters that
interface with BMA's EFIS ONE. We have the Vision Microsystems probes and
I am told by the folks at EI that they are virtually identical to the EI
probes. The only difference is that the "electonics" are in a small bulge
outside of the probe while the VMS electronics module is in the housing.
(Guess which one we should have ordered?? :-(( ) Anyway, you run a wire
off of one of the 5 volt out pins on the EFIS CPU. Branch it to the probes
and take the signals back to pins 4&5, I believe, of Analog 1. I have some
of the thread in a word doc and can send it to you. But Todd should be
able to help. His modules ran $95 each and come with directions.
todds@princeton-electronics.com
Hope this helps.
Regards,
John
Message 4
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| Subject: | PWM Signal to 0-5v Voltage Converter |
--> AeroElectric-List message posted by: Mark Steitle <msteitle@mail.utexas.edu>
Trampas,
That would be great news. The BMA does have both low frequency and high
frequency channels. So, this would be low frequency? I guess I could try
that and see if it works. That would be too easy. ;-)
Mark
At 11:28 AM 7/21/2004 -0400, you wrote:
>--> AeroElectric-List message posted by: "Trampas" <tstern@nc.rr.com>
>
>Mark,
>
>My understanding is that the EI probes output a 5V frequency signal which is
>around 2Khz and the frequency varies with the fuel level. I think BMA can
>accept a frequency input to their device, thus making the interfacing simple
>as hooking it up.
>
>Regards,
>Trampas Stern
>
>
>-----Original Message-----
>From: owner-aeroelectric-list-server@matronics.com
>[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Mark
>Steitle
>To: aeroelectric-list@matronics.com
>Subject: AeroElectric-List: PWM Signal to 0-5v Voltage Converter
>
>--> AeroElectric-List message posted by: Mark Steitle
><msteitle@mail.utexas.edu>
>
>
> >
> >Does anyone know where I can get a converter that takes a 5v pwm signal
> >and converts it to 0-5v output. The purpose is to convert the output
> >signal from my Electronics Int'l. capacitive fuel probes to a signal that
> >my BMA EFIS can understand. I figure there ought to be a simple circuit
> >somewhere that will do this, but I haven't been able to find it. I feel
> >confident that I could assemble such a device, but its beyond me to design
> >such a circuit from scratch.
> >
> >Thanks,
> >Mark S.
>
>
Message 5
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| Subject: | Re: Suggestions for software to create simple wiring |
diagrams
--> AeroElectric-List message posted by: "Greg Reid" <AllTheGoodUseridsAreGone@hotmail.com>
Thanks for all of the suggestions, folks. I should've mentioned that
this is for a Windoze laptop. Bob, I did download and install the three
free CAD tools from your site:
- Acad Lt 1.0 installation apparently wants me to cut four floppy
disks?! I don't have a floppy at all.
- TurboCad execution is time-limited . and furthermore when it expired
on my laptop (I'd installed this from your site ages ago, and forgot
about it!) the forced "registration" step completely hung my laptop when
it was unable to reach the registration server (I use a proxy and
firewall) . couldn't even kill it with Task Manager . big red switch
time.
- IntelliCad 2000 seems pretty decent . used it to view Z11H . will have
to play with it some more
Meanwhile, last night I did a little Google'ing and came across
"SmartDraw", which seems to be well respected and supported, and used a
30-day trial copy to create my left wing wiring diagram quite nicely.
(I have no financial interest, etc. etc.) I'll keep playing with it to
see if it's worth purchasing. And I'll spend some time with IntelliCad
too.
Regards,
Greg
Message 6
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| Subject: | Re: Suggestions for software to create simple |
wiring diagrams
--> AeroElectric-List message posted by: Tim Coldenhoff <rv9a_000@deru.com>
Greg Reid wrote:
> --> AeroElectric-List message posted by: "Greg Reid"
>
> Thanks for all of the suggestions, folks. I should've mentioned that
> this is for a Windoze laptop. Bob, I did download and install the three
> free CAD tools from your site:
I have a late entry for you - Design CAD Express.
Take a look at http://www.upperspace.com
The new version 15 is only $34.95.
This is a full featured CAD program. I bought a
copy and have created schematics, bracket designs,
and my panel layout with it. It will import and
export Autocad files (and some other formats).
--
Tim Coldenhoff
#90338 - Finishing!
http://rv9a.deru.com
Message 7
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| Subject: | Location of GPS antenna |
--> AeroElectric-List message posted by: PeterHunt1@aol.com
Am I in any way compromising my GPS antenna reception (for a GNS 530) if I
place the antenna under my cowl about 10 inches from my SD-20 alternator? Is
there an "electrical" issue having it that close or near my LASAR ignition
wires? I see by the archives that many of you place your GPS antenna under your
cowl. Do any of you have an argument for not doing so?
Pete
RV-6, finishing engine instillation
Clearwater, FL
Message 8
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--> AeroElectric-List message posted by: Don Boardman <dboardm3@twcny.rr.com>
> Dee and I will make the pilgrimage to OSH after about 8 years
> hiatus. I'm scheduled to offer a forum in the tents on Saturday
> at 2:30 p.m. We'd be pleased to meet face to face with any of
> you who can join us.
> Bob . . .
Hi Bob,
I am the Chairman in charge of the fun stuff (activities) at the Oshkosh
SeaBase. Saturday is a hectic day for me and I doubt if I can make your
seminar. We have a "Pig Roast" at the Base on Saturday. I am not directly in
charge of that event but have lots to do. I think it starts at 5PM. We are
also being host to a Murphy Aircraft group during the Friday evening fish
dinner. The dinner sold by the food vendor is open to all comers. If by
chance you get to the SeaBase for either of these (or any other time) you
could ask for me at the registration office and they will page me. If it is
convenient and works into your plans, I'd love to touch base and put a face
on the person who was so helpful with the wiring of my Murphy Moose
Side note: Had the EAA'ers at the hanger tonight. I installed the Moose atop
it's Aerocet Amphibs earlier in the day ... finally. Everyone was very
interested with the electrical architecture. "Where are the breakers" etc.
Thanks again for all your help,
Don Boardman
Rome, NY
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