Today's Message Index:
----------------------
1. 04:34 AM - Re: Magneto Replacements (James E. Clark)
2. 05:56 AM - LED reading/map/cabin light sources (Eric M. Jones)
3. 06:16 AM - Re: Removing Molex KK Pins (Joe Dubner)
4. 06:46 AM - Re: Magneto Replacements (Jim Sower)
5. 07:09 AM - DsubSourceSought (DAVID REEL)
6. 07:53 AM - Re: LED reading/map/cabin light sources (James Redmon)
7. 07:55 AM - Re: Magneto Replacements (Robert L. Nuckolls, III)
8. 08:38 AM - Re: Removing Molex KK Pins (Robert L. Nuckolls, III)
9. 08:50 AM - Re: Magneto Replacements (Dj Merrill)
10. 09:12 AM - Re: DsubSourceSought (Robert L. Nuckolls, III)
11. 09:50 AM - Re: Last Minute...? (Dan Branstrom)
12. 10:02 AM - Re: RemovingDsubPins (Roger Roy)
13. 11:17 AM - Infernal congestion engines (Fergus Kyle)
14. 11:42 AM - Re: AeroElectric-List Digest: 59 Msgs - 11/25/03 (Ted Lemen)
15. 12:25 PM - LED questions ('Scott Richardson')
16. 12:35 PM - Re: RemovingDsubPins (Robert L. Nuckolls, III)
17. 12:58 PM - Speaking of "lots work still to be done" (Robert L. Nuckolls, III)
18. 01:21 PM - Pitot Heat Wiring (Tom Caruthers)
19. 02:21 PM - Re: LED questions (Neville Kilford)
20. 02:22 PM - LED questions (Eric M. Jones)
21. 02:32 PM - Last minute... (Terry Watson)
22. 03:26 PM - Re: RemovingDsubPins (Roger Roy)
23. 03:48 PM - Re: LED questions (Robert L. Nuckolls, III)
24. 04:25 PM - SEND MONEY! (Duncan McBride)
25. 06:30 PM - Re: LED questions (John Schroeder)
26. 07:30 PM - Re: Infernal congestion engines (George Braly)
27. 07:34 PM - quote ... (George Braly)
28. 07:40 PM - Re: LED questions (Fiveonepw@aol.com)
29. 09:53 PM - Re: Infernal congestion engines (John R)
30. 10:06 PM - Re: LED questions ()
31. 10:12 PM - Re: quote ... (Robert L. Nuckolls, III)
32. 11:03 PM - Re: Infernal congestion engines (George Braly)
Message 1
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| Subject: | Magneto Replacements |
--> AeroElectric-List message posted by: "James E. Clark" <james@nextupventures.com>
Dj,
There are technical differences between the two but both seem to do a fine
job. Once installed, I doubt if you could tell which one is "under the
hood". You *will* be able to tell that EI is under the hood though.
My partner's and mine RV6 has Jeff Rose's unit. My RV6 buddy next hangar
over has Klaus' unit. The RV I am building has Klaus' unit.
I won't attempt to try to sort out the two but if you give Jeff a call he
will gladly go over the +'s and -'s (I assume there are some :-) ) of his
unit. I say this because when I **THOUGHT** I had a problem with Jeff's
unit, he bent over backwards to help me with the "problem", even though it
turned out not to be his product as culprit. And we knew that it was a long
shot in the beginning. Haven't had the "opportunity" for such with Klaus as
the plane is not flying yet.
From "RV Yeller Pages": ELECTROAIR (JEFF ROSE) 423-622-8825
electroair@juno.com ELECTRONIC IGNITION
James
>
> >
> > electroair@juno.com is a couple of years old.
>
> I was hoping they might have a web site with details
> about their EI product. I've found all sorts of information about
> the Lightspeed product from their web site
> (http://www.lightspeedengineering.com/), and was hoping to do the
> same with Electroair. Is there a huge difference in the two?
>
> -Dj
>
Message 2
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| Subject: | LED reading/map/cabin light sources |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
>From: Joa Harrison (flyasuperseven@yahoo.com)
>Could any of you recommend one or more sources for ready-to-use LED lights
for
>reading (swivel), map (swivel but smaller with more spot lighting), and an
LED
>cabin light?
Joa, J.C.Whitney auto parts supply is usually good. Local auto parts stores
are a good place to look too. I've seen great stuff there.
Eric
(Do Not Archive)
Message 3
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| Subject: | Re: Removing Molex KK Pins |
--> AeroElectric-List message posted by: Joe Dubner <jdubner@yahoo.com>
> --> AeroElectric-List message posted by: "James Redmon" <james@berkut13.com>
>
> Does anyone have a good (read: cheap) source for the extractor tool used to
> remove Molex KK series pins? These are the pins used in King/Narco radio
> connectors.
James,
I made one from a feeler gauge. I chose a size that was a compromise
between being thin enough to be readily inserted and being thick enough
to be strong so I could push on it without too much bending. Then I
ground its width down so it would fit inside the connector. Can't
remember for sure but it may have been .013".
I suppose you could do the same with a scrap of spring steel or other
suitable metal.
--
Joe
Long-EZ 821RP
Clarkston, WA
Message 4
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| Subject: | Re: Magneto Replacements |
--> AeroElectric-List message posted by: Jim Sower <canarder@frontiernet.net>
<... Is there a huge difference in the two ...>
I seriously doubt it.
Dj Merrill wrote:
> --> AeroElectric-List message posted by: Dj Merrill <deej@thayer.dartmouth.edu>
>
> > --> AeroElectric-List message posted by: Jim Sower <canarder@frontiernet.net>
> >
> > electroair@juno.com is a couple of years old.
>
> I was hoping they might have a web site with details
> about their EI product. I've found all sorts of information about
> the Lightspeed product from their web site
> (http://www.lightspeedengineering.com/), and was hoping to do the
> same with Electroair. Is there a huge difference in the two?
>
> -Dj
Message 5
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| Subject: | DsubSourceSought |
--> AeroElectric-List message posted by: "DAVID REEL" <dreel@cox.net>
Having thoroughly fouled up my first wiring attempt, wires too short & too small
to crimp properly, I'm looking for a source for a new female Dsub connector
that goes on the back of my Garmin 320A transponder's installation tray. The
existing connector is labeled ITT 0208 DBMA25S. It appears to have a white ceramic
body specially designed to guide pins into the socket when sliding the transponder
into it's mounting tray. In addition, the clearance between machined
pin body and the wire side of the socket is so small that it's proving impossible
to get the extraction tool to slide past the pin. The same tool worked
fine on a plastic body connector from Radio Shack.
Dave Reel - RV8A
Message 6
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| Subject: | Re: LED reading/map/cabin light sources |
--> AeroElectric-List message posted by: "James Redmon" <james@berkut13.com>
I found this little gem of a web site a few weeks ago looking for the same
thing for my Berkut: http://www.theledlight.com
They have all kinds of LED based lights, components, mounts, etc. Pretty
much, if they don't have it - it doesn't exist. ;-)
Enjoy,
James Redmon
Berkut #013 N97TX
www.berkut13.com
----- Original Message -----
From: "Eric M. Jones" <emjones@charter.net>
Subject: AeroElectric-List: LED reading/map/cabin light sources
> --> AeroElectric-List message posted by: "Eric M. Jones"
<emjones@charter.net>
>
> >From: Joa Harrison (flyasuperseven@yahoo.com)
> >Could any of you recommend one or more sources for ready-to-use LED
lights
> for
> >reading (swivel), map (swivel but smaller with more spot lighting), and
an
> LED
> >cabin light?
>
> Joa, J.C.Whitney auto parts supply is usually good. Local auto parts
stores
> are a good place to look too. I've seen great stuff there.
>
> Eric
>
> (Do Not Archive)
>
>
Message 7
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| Subject: | Re: Magneto Replacements |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 02:30 AM 11/26/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: Dj Merrill
><deej@thayer.dartmouth.edu>
>
> > --> AeroElectric-List message posted by: Jim Sower
> <canarder@frontiernet.net>
> >
> > electroair@juno.com is a couple of years old.
>
> I was hoping they might have a web site with details
>about their EI product. I've found all sorts of information about
>the Lightspeed product from their web site
>(http://www.lightspeedengineering.com/), and was hoping to do the
>same with Electroair. Is there a huge difference in the two?
In terms of performance, you'll find no demonstrable
differences in the two systems with respect to how
the engine performs. Both products have a long and
successful history. I've known both of these fellows
for 10+ years.
I've bugged Jeff numerous times about getting a stronger
web-presence. I think he's byte-shy. Here are some webpages
that speak to his product and gives you contact data.
Give him a call. He's the consummate southern gentleman.
http://exp-aircraft.com/vendors/electroa.html
http://www.fly-gbi.com/EIS.htm
Bob . . .
--------------------------------------------
( A beginning of the end is marked by )
( replacement of experience and common )
( sense with policy and procedures. )
( R. L. Nuckolls III )
--------------------------------------------
Message 8
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| Subject: | Re: Removing Molex KK Pins |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 12:16 AM 11/26/2003 -0600, you wrote:
>--> AeroElectric-List message posted by: "James Redmon" <james@berkut13.com>
>
>Does anyone have a good (read: cheap) source for the extractor tool used to
>remove Molex KK series pins? These are the pins used in King/Narco radio
>connectors.
>
>Mouser wants $50+ for a little sliver of metal with a handle on it - that's
>nuts! I found one company that had them for $1.50 but they were out of
>stock for months...wonder why?!?
I've made dozens of extraction tools for various
tab-retained connector pins by cutting down a
pocket screwdriver as shown here:
http://www.aeroelectric.com/Pictures/extraction_tool.jpg
You need to grind gently so that the shank doesn't get so
hot that it melts the plastic handle.
Bob . . .
Message 9
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| Subject: | Re: Magneto Replacements |
--> AeroElectric-List message posted by: Dj Merrill <deej@thayer.dartmouth.edu>
On Wed, 26 Nov 2003, Robert L. Nuckolls, III wrote:
> I've bugged Jeff numerous times about getting a stronger
> web-presence. I think he's byte-shy. Here are some webpages
> that speak to his product and gives you contact data.
> Give him a call. He's the consummate southern gentleman.
>
> http://exp-aircraft.com/vendors/electroa.html
> http://www.fly-gbi.com/EIS.htm
>
> Bob . . .
Thanks!
-Dj
--
Dj Merrill Thayer School of Engineering
ThUG Sr. Unix Systems Administrator 8000 Cummings Hall
deej@thayer.dartmouth.edu - N1JOV Dartmouth College, Hanover, NH 03755
"On the side of the software box, in the 'System Requirements' section,
it said 'Requires Windows 95 or better'. So I installed Linux." -Anonymous
Message 10
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| Subject: | Re: DsubSourceSought |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:10 AM 11/26/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "DAVID REEL" <dreel@cox.net>
>
>Having thoroughly fouled up my first wiring attempt, wires too short & too
>small to crimp properly, I'm looking for a source for a new female Dsub
>connector that goes on the back of my Garmin 320A transponder's
>installation tray. The existing connector is labeled ITT 0208
>DBMA25S. It appears to have a white ceramic body specially designed to
>guide pins into the socket when sliding the transponder into it's mounting
>tray. In addition, the clearance between machined pin body and the wire
>side of the socket is so small that it's proving impossible to get the
>extraction tool to slide past the pin. The same tool worked fine on a
>plastic body connector from Radio Shack.
I don't think that connector is anything special. The
part shows up in the itt-cannon catalog which you can
download at:
http://www.aeroelectric.com/temp/DSubCatalog98.pdf
See page 183. These connectors tend to be pretty generic
across manufacturers. Compare the connector you have with
a 25S d-sub from Radio Shack. There are some series
d-subs with short shells that take special pins.
But for the most part, I've had good luck substituting
connectors from other suppliers. See if the Radio Shack
shell will fit your installation. If so, throw away
the sheet metal pins that come with it and substitute
the machined pins.
Bob . . .
Message 11
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| Subject: | Re: Last Minute...? |
--> AeroElectric-List message posted by: "Dan Branstrom" <danbranstrom@verizon.net>
Hi Matt.
My contribution will be coming in December, sorry about the delay.
Dan Branstrom, Aeroelectric list
----- Original Message -----
From: "Matt Dralle" <dralle@matronics.com>
Subject: AeroElectric-List: Last Minute...?
> --> AeroElectric-List message posted by: Matt Dralle
<dralle@matronics.com>
>
>
> Dear Listers,
>
> First, I would like to thank everyone that has so graciously already made
a
> Contribution to support the Email Lists this year!! Thank you!
>
> That being said, I'm hoping that everyone else is just waiting until the
> last minute to make their Contribution... The percentage of List members
> making a Contribution is well below last year at this time. Was it
> something I said...? :-)
>
> There's only a few more days left in this year's Fund Raiser; please help
> support the continued operation and upgrade of these Lists by making a
> Contribution today.
>
> You might look at it this way; surly the Lists are as entertaining as a
> typical magazine subscription - maybe more so because you can actually
make
> your personal opinion known as well as ask questions of the "experts"! A
> year's subscription to Kitplanes, for example, is $30 -- and you only get
> it once a month! You can get nuggets of goodness from the List almost
> every day as well as on-line search 14 year's of Archives! Your Lists
> subscription is certainly worth a similar amount, isn't it?! :-)
>
> Won't you please make your Contribution today!
>
> http://www.matronics.com/contribution
>
> Thank you for all your support!
>
> Matt Dralle
> Email List Administrator
>
>
> Matt G Dralle | Matronics | PO Box 347 | Livermore | CA | 94551
> 925-606-1001 V | 925-606-6281 F | dralle@matronics.com Email
> http://www.matronics.com/ WWW | Featuring Products For Aircraft
>
> do not archive
>
>
Message 12
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| Subject: | Re: RemovingDsubPins |
Seal-Send-Time: Wed, 26 Nov 2003 13:01:54 -0500
--> AeroElectric-List message posted by: "Roger Roy" <Savannah174@msn.com>
Bob, While we are on this discussion of pin removal tools wasn't there at one time
on your site a tool for removing Molex Pin and Socket connector .062 I can't
locate it in your tool section, need help thanks
Roger J. Roy
----- Original Message -----
From: Robert L. Nuckolls, III
To: aeroelectric-list@matronics.com
Sent: Wednesday, November 26, 2003 12:01 AM
Subject: Re: AeroElectric-List: RemovingDsubPins
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 02:07 PM 11/21/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "DAVID REEL" <dreel@cox.net>
>
>Having inserted one of the machined Dsub pins into it's female connector,
>having never removed one of these pins, having searched the list, I'm
>wondering how to do it. Does the pin just push out without ruining the
>grip of the connector for a reinserted pin? The seat & release tool is
>mysterious to me as neither the red nor the white end fits into the
>connection side of the female connector to push with.
>
>Secondarily, I got in this position crimping onto 24 gauge wires with the
>eclipse 300-015 crimp tool, but one of the wires pulled loose.
that tool is marginal on 24AWG wire. you need to double back the strands
before crimping. The dies on that tool are optimized for 20/22 AWG wire
in the 20AWG pin.
> The garmin transponder installation kit contained the pin & the garmin
> installation manual says don't use smaller than 24 awg wire. So, I
> thought I'd be OK. It seems unlikely I could have just not crimped the
> pin so is there a problem to look out for here? This was pin 15 of my
> vast crimping experience of 16.
The white end of the extraction tool is pushed
down past the crimp barrel on the pin.
See http://www.aeroelectric.com/Pictures/dse-1.jpg
and
http://www.aeroelectric.com/Pictures/dse-1a.jpg
There is a "tire treaded" groove in the tool's
handle. When the tool is seated, put the wire into
the groove and press with your finger so that you
put tension on tool and wire together. It's almost
always helpful to put a 90 degree twist on the
tool with light tension . . . and it should come
right out.
Bob . . .
Message 13
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| Subject: | Infernal congestion engines |
--> AeroElectric-List message posted by: "Fergus Kyle" <VE3LVO@rac.ca>
">--> AeroElectric-List message posted by: George Braly gwbraly@gami.com>
> >> and the power pulses are much less violent than those of a four
stroke.
Could you please enlighten me on exactly where the data to support
>that claim comes from?
> Typical diesel peak internal cylinder pressures are up around 1700
>PSI. Typical high power S.I. engines have peak internal cylinder
pressures up around 900 PSI, 1050, max.
> Very hard to get "less violent" out of 1700 verses 900 - - when
both
>events happen in the same time frame.
Not at all. It depends on what you think "less violent"
means. If you design a balanced twostroke diesel with three inline
cylinders, the result is close to a turbine engine in vibration (count the
pulses). The engine is violent, the cockpit/fuselage is serene. Strange that
no one has heard of the Wilksch, flying since 1992.
> I don't think this has anything to do with four stroke vs two
>stroke. If it does, I would sure like an explanation of the physics of
>that?
Why would one want a theoretical discussion when the
experience of it makes all that chat redundant? just go over the pond and
try it out, then come back and spout the theory.
> There is a monumental - - truly monumental - - amount of marketing
>claims and B.S. information associated with internal combustion engines.
>Regards, George
I think we've just read some.
Ferg
Europa A064
Message 14
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| Subject: | Re: AeroElectric-List Digest: 59 Msgs - 11/25/03 |
--> AeroElectric-List message posted by: "Ted Lemen" <tedlem@ecentral.com>
> Radio shack had a tool for about $5.0.
>
>
> ________________________________ Message 56
____________________________________
>
>
> Time: 10:18:58 PM PST US
> From: "James Redmon" <james@berkut13.com>
> Subject: AeroElectric-List: Removing Molex KK Pins
>
> --> AeroElectric-List message posted by: "James Redmon"
<james@berkut13.com>
>
> Does anyone have a good (read: cheap) source for the extractor tool used
to
> remove Molex KK series pins? These are the pins used in King/Narco radio
> connectors.
>
> Mouser wants $50+ for a little sliver of metal with a handle on it -
that's
> nuts! I found one company that had them for $1.50 but they were out of
> stock for months...wonder why?!?
>
> Thanks,
>
> James Redmon
> Berkut #013 N97TX
> www.berkut13.com
>
>
> >
>
Message 15
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--> AeroElectric-List message posted by: "'Scott Richardson'" <scott_m_richardson@sbcglobal.net>
Couple of questions on LED characteristics...
I'm planning on using LED indicators for the annunciator lights on my
panel and most that
I see are rated at 12V or 24V. Am I going to do anything to their
stability or life by running
them at the 13.8V of an aircraft electrical system? or down at the
10.5V of a near-dead
battery? I'm just not sure what the range of acceptable voltages is.
Along these lines, I'd like to but in a bright-dim circuit for all my
annunciators that might be
running them at a voltage in the 5-8V range. Do LED's dim well or do
they have a lower
cutoff voltage where they simply stop producing light.
Thanks for any advice...
Scott
Message 16
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| Subject: | Re: RemovingDsubPins |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 01:01 PM 11/26/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "Roger Roy" <Savannah174@msn.com>
>
>Bob, While we are on this discussion of pin removal tools wasn't there at
>one time on your site a tool for removing Molex Pin and Socket connector
>.062 I can't locate it in your tool section, need help thanks
No, never did stock that tool. My suggestion
is to check out this source:
http://dkc3.digikey.com/PDF/T033/0102.pdf
http://rocky.digikey.com/WebLib/Molex/Web%20Data/extractor%20tooling%20specification.pdf
http://rocky.digikey.com/WebLib/Molex/Web%20Photos/11-03-0002.jpg
Bob . . .
Message 17
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| Subject: | Speaking of "lots work still to be done" |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
<snip>
>*IF* the projects would have proved reasonably feasible then they may have
>made it to the next step. This approach is FAR better (in my mind)than
>making some brash claim that the xyz widget is going to be greatest thing
>since sliced bread and be available next month for 1/2 the price, blah,
>blah, when in fact you have no clue if you can make the thing.
. . . exactly. Virtually every company I've worked for
had their development work done, production problems
worked out and had built and tested several pre-production
articles to see if it was meeting our claim BEFORE we
offered it for sale . . . . every company EXCEPT air-framers . . .
<snip>
>In my opinion, it will take a few years just to know if this is a *feasible*
>venture (technology and business) and then another bit of time to build
>plants/factories and ramp up for production. And oh, there is some amount of
>testing of the "real" thing that gets figured in.
>
>Finally, to connect this to "Aeroelectric-List" stuff .... Did you know they
>plan to use FADEC and built in permanent magnet alternator (that is built
>in, so to speak)?? They want to make sure there is a reasonable chance of
>juice being available for the FADEC.
Jim, Is there a public source of information on their activities.
All I've been able to learn is from a couple of suppliers who
have been approached for products . . .
Bob . . .
Message 18
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| Subject: | Pitot Heat Wiring |
--> AeroElectric-List message posted by: Tom Caruthers <tomcaruthers@yahoo.com>
Hi All,
I am installing a heated pitot tube that the
manufacturer suggests using a 20A breaker or a
slow-blow fuse. I plan on using fuses for the rest of
my loads. How should the pitot heat be wired? I was
thinking of using a 16ga fuselink from the main
terminal of the fuseblock to a 20A breaker to a 1-3
switch. Another possibility would be to replace the
breaker and switch with a combo breaker/switch.
Any suggestions/comments?
Thanks, Tom
__________________________________
Free Pop-Up Blocker - Get it now
http://companion.yahoo.com/
Message 19
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| Subject: | Re: LED questions |
--> AeroElectric-List message posted by: "Neville Kilford" <nkilford@etravel.org>
Can I second this enquiry please? Bob, can you point us at a back-to-basics
article about LEDs and dimming them? It would be very useful to know, for
example, how to calculate the resistor values for one / some LEDs in series /
parallel, etc.
Thanks in advance.
Nev
--
Jodel D-150 in progress
UK
----- Original Message -----
From: "'Scott Richardson'" <scott_m_richardson@sbcglobal.net>
Subject: AeroElectric-List: LED questions
> --> AeroElectric-List message posted by: "'Scott Richardson'"
<scott_m_richardson@sbcglobal.net>
>
> Couple of questions on LED characteristics...
>
> I'm planning on using LED indicators for the annunciator lights on my
> panel and most that
> I see are rated at 12V or 24V. Am I going to do anything to their
> stability or life by running
> them at the 13.8V of an aircraft electrical system? or down at the
> 10.5V of a near-dead
> battery? I'm just not sure what the range of acceptable voltages is.
>
> Along these lines, I'd like to but in a bright-dim circuit for all my
> annunciators that might be
> running them at a voltage in the 5-8V range. Do LED's dim well or do
> they have a lower
> cutoff voltage where they simply stop producing light.
>
> Thanks for any advice...
>
> Scott
>
>
Message 20
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--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
>From: 'Scott Richardson' (scott_m_richardson@sbcglobal.net)
>Couple of questions on LED characteristics...
>I see are rated at 12V or 24V. Am I going to do anything to their
>stability or life by running them at the 13.8V of an aircraft electrical
system? or down at the
>10.5V of a near-dead battery? I'm just not sure what the range of
acceptable voltages is.
>Along these lines, I'd like to but in a bright-dim circuit for all my
>annunciators that might be running them at a voltage in the 5-8V range. Do
LED's dim well or do
>they have a lower cutoff voltage where they simply stop producing light.
Scott--Actually LEDs are rated at a couple of volts. They don't do anything
at lower voltages. Above a couple of volts, the produce light depending on
how much current flows through them. Ohm's Law E=IR is applicable here with
just a little jiggering. Voltage across the device is equal to the Current
(I)through it times the Resistance (R). Since the LED automatically drops
couple volts all the time (let's call it Vf), the voltage we're looking at
is really E minus Vf. Then the formula is:
(E-Vf)=IR
Everything else with a small amount of algebra follows from this. Remember a
few small details---
1) LEDs don't change color as voltage changes. Incandescents do!
2) LEDs are diodes and diodes don't like parallel hook-ups. If you want
parallel LEDs you have to limit the current through each LED with a little
resistor.
3) The series resistor wattage is I x I x R. Don't forget 25 milliamps is
0.025 Amps.
4) Buy LEDs from eBay if you can.
5) There is almost no upper voltage limit. LEDs work fine at voltages where
the resistor becomes the problem. For a 20 milliamp LED operated at 10
kilovolts you just use a 500k ohm 200W resistor($75).
If you plan to power an LED from 14.5V, it will work at 16V and still work
at a few volts.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
Phone (508) 764-2072
Email: emjones@charter.net
Message 21
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--> AeroElectric-List message posted by: "Terry Watson" <terry@tcwatson.com>
I just posted this on the RV list and I didn't want any Aeroelectric list
members who do not subscribe to the RV list to get away without having to
see it ...
Last minute
It seems that in years past there has been more mention and discussion of
the annual contribution drive than this year. I have no Idea how Matt is
doing this year but I wanted to remind some of you who might not have gotten
around to it yet just what we get out of his lists, or at least what I get
out of them:
With a few minutes at the keyboard you can get attention to your question or
problem by some real experts on the subject who somehow all seem to be true
gentlemen too. Over the years I have developed a deep respect for any
comments or answers posted by Eustace Bowhay or Doug Rozendaal or Kevin
Horton or Robert Nuckolls (Aeroelectric List) or Pat Hatch or Randy Levold
or Sam Buchanon (smiley face here) or maybe a dozen others who always seem
to have been there and done that, or maybe wrote the book about it or taught
the class in it or maintain a website on it. Sometimes it takes a long time
to really appreciate the depth of knowledge of these guys, individually and
collectively. They never tell you that they wrote the book; they just give
you a courteous and detailed answer to your question. After awhile you begin
to realize what an extraordinary place we are in history where we can get
such detailed answers to our questions from experts literally around the
world.
Matt's lists make it possible. We need to make sure he keeps on doing it.
Send him some money.
Terry Watson
6th year on an RV-8A; wires everywhere
Seattle
P.S. Don't miss Doug Rozendaal's article on "Surviving Engine Out in IMC"
in the December issue of IFR magazine, even if you don't fly IFR
Do not archive
Message 22
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|
| Subject: | Re: RemovingDsubPins |
Seal-Send-Time: Wed, 26 Nov 2003 18:25:53 -0500
--> AeroElectric-List message posted by: "Roger Roy" <Savannah174@msn.com>
Thanks for the info Bob
Roger J. Roy
----- Original Message -----
From: Robert L. Nuckolls, III
To: aeroelectric-list@matronics.com
Sent: Wednesday, November 26, 2003 3:35 PM
Subject: Re: AeroElectric-List: RemovingDsubPins
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 01:01 PM 11/26/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "Roger Roy" <Savannah174@msn.com>
>
>Bob, While we are on this discussion of pin removal tools wasn't there at
>one time on your site a tool for removing Molex Pin and Socket connector
>.062 I can't locate it in your tool section, need help thanks
No, never did stock that tool. My suggestion
is to check out this source:
http://dkc3.digikey.com/PDF/T033/0102.pdf
http://rocky.digikey.com/WebLib/Molex/Web%20Data/extractor%20tooling%20specification.pdf
http://rocky.digikey.com/WebLib/Molex/Web%20Photos/11-03-0002.jpg
Bob . . .
Message 23
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| Subject: | Re: LED questions |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:24 PM 11/26/2003 +0000, you wrote:
>--> AeroElectric-List message posted by: "Neville Kilford"
><nkilford@etravel.org>
>
>Can I second this enquiry please? Bob, can you point us at a back-to-basics
>article about LEDs and dimming them? It would be very useful to know, for
>example, how to calculate the resistor values for one / some LEDs in series /
>parallel, etc.
>
>Thanks in advance.
Eric has done well in this regard already. There's an old article
I did on the topic several years ago at:
http://www.aeroelectric.com/articles/leds3.pdf
Bob . . .
Message 24
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--> AeroElectric-List message posted by: "Duncan McBride" <duncanmcbride@comcast.net>
Without going through all the reasonable arguments, JUST SEND MONEY! WHAT
ARE YOU, CRAZY? You belong to EAA, or AOPA, or USUA, or AARP, for crying
out loud, what do you get from them that is worth a tenth of what you get
here? Send in some money. Sign up for paypal, join the 21st century, and
send the man 20 bucks. At least. If you even scan the headers for
something remotely related to your stage of construction, send in at least
20 bucks. Jeez. Do it. Now.
Now.
----- Original Message -----
From: "Terry Watson" <terry@tcwatson.com>
Subject: AeroElectric-List: Last minute...
> --> AeroElectric-List message posted by: "Terry Watson"
<terry@tcwatson.com>
>
>
> I just posted this on the RV list and I didn't want any Aeroelectric list
> members who do not subscribe to the RV list to get away without having to
> see it ...
>
> Last minute
>
> It seems that in years past there has been more mention and discussion of
> the annual contribution drive than this year. I have no Idea how Matt is
> doing this year but I wanted to remind some of you who might not have
gotten
> around to it yet just what we get out of his lists, or at least what I get
> out of them:
>
> With a few minutes at the keyboard you can get attention to your question
or
> problem by some real experts on the subject who somehow all seem to be
true
> gentlemen too. Over the years I have developed a deep respect for any
> comments or answers posted by Eustace Bowhay or Doug Rozendaal or Kevin
> Horton or Robert Nuckolls (Aeroelectric List) or Pat Hatch or Randy Levold
> or Sam Buchanon (smiley face here) or maybe a dozen others who always seem
> to have been there and done that, or maybe wrote the book about it or
taught
> the class in it or maintain a website on it. Sometimes it takes a long
time
> to really appreciate the depth of knowledge of these guys, individually
and
> collectively. They never tell you that they wrote the book; they just
give
> you a courteous and detailed answer to your question. After awhile you
begin
> to realize what an extraordinary place we are in history where we can get
> such detailed answers to our questions from experts literally around the
> world.
>
> Matt's lists make it possible. We need to make sure he keeps on doing it.
> Send him some money.
>
> Terry Watson
> 6th year on an RV-8A; wires everywhere
> Seattle
>
> P.S. Don't miss Doug Rozendaal's article on "Surviving Engine Out in IMC"
> in the December issue of IFR magazine, even if you don't fly IFR
>
> Do not archive
>
>
Message 25
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| Subject: | Re: LED questions |
--> AeroElectric-List message posted by: John Schroeder <jschroeder@perigee.net>
Neville -
Bob has already done what you requested. The archives should have a couple
of long replies about LEDs that Bob authored. I keep a running log of a
lot of his answers and can send you what I have. One is a file in MS Word
and one or two in .pdf format. Let me know if you can take them as
attachments to an email.
Mark Phillips hangs out on this list and developed a very neat solution
for an annunciator panel that uses a zener diode and a switch to dim the
modules. Each module has 3 LED's in it. YOu can get these in red, gree,
and yellow. Neat stuff. I have a copy of his AutoCAD file.
Cheers,
John
O
> Bob, can you point us at a back-to-basics article about LEDs and dimming
> them? It would be very useful to know,
>>
>> I'm planning on using LED indicators for the annunciator lights on my
>> panel and most that
>> I see are rated at 12V or 24V.
>>
>> Scott
Message 26
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| Subject: | Infernal congestion engines |
--> AeroElectric-List message posted by: George Braly <gwbraly@gami.com>
>> Not at all. It depends on what you think "less violent"
means.<<
Well... I do know what "less violent" means in the context of an
engineering analysis of the engine.
Any good textbook on the subject will describe (try Taylor, C.F., ) the
issue. And it is not what the pilot thinks of the engine in the cockpit.
When one begins to design the engine, the first thing one must define is the
internal gas pressures above the piston. Diesel engines run about 2x higher
on average at cruise.
Your two stroke three cylinder inline engine may be subjectively wonderful -
- in the cockpit - - but it may also play hell with propellers and
accessories.
Which is why I asked for data, rather than subjective impressions. I have
a few gigabytes of crankshaft torsional data - - and it sure as the devil
correlates very closely to peak internal cylinder pressures.
Of course, if one runs it fast enough and then gears down for the prop, you
can make a really ugly internal combustion engine (diesel or spark ignition)
appear to be smooth to the folks in the cockpit.
Regards, George
---
Message 27
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--> AeroElectric-List message posted by: George Braly <gwbraly@gami.com>
--------------------------------------------
( A beginning of the end is marked by )
( replacement of experience and common )
( sense with policy and procedures. )
( R. L. Nuckolls III )
--------------------------------------------
Bob, can I use your quote? The T-34 wing spar issue is
"heating up" in light of the recent crash near Houston.
It is now starting to appear the wing failure was, among
other issues, due to enormous overloading of the structure. There is a lot
of concern that the FAA may decide to do the wrong thing with policy and
procedures! Your quote might come in handy.
George
---
Message 28
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| Subject: | Re: LED questions |
--> AeroElectric-List message posted by: Fiveonepw@aol.com
Hi Scott- here are my recent "learnings" FWIW................long- delete if
not interested!!!
I built a ten-function LED annunciator panel utilizing LED modules from
DigiKey part#404-1145-ND (red) and 404-1146-ND (yellow). These each have 3 LEDs,
which I connected in series with the appropriate resistors of 240 ohms. Some
are sinking (if I have my terms unmiscobobulated, these have bus voltage
applied and utilize a switched ground, such as oil pressure, flaps retracted, canopy
latched and EIS "big red light", etc. The others are "sourced", meaning they
monitor a voltage applied, such as from the starter energized, fuel pump on,
fuel low float switch timer output etc.
I connected them using a DPDT miniature switch (Mouser #611-7201-021) with
direct applied voltage and ground when in the "BRT" position, and zener diodes
inserted into both sides when in the "DIM" position. If you can read AutoCad I
can send a dwg and fotos of the completed board. I started out with 4.7 volt
zeners with not enough dimming effect, tried 6.2 volt which while working
well on the others, rendered the EIS inoperative when activated in the "dim"
mode. I finally settled on 5.7 volt zeners.
I also employed the same switch to handle the BRT/DIM function for my main
function rocker switches (landing/taxi lights, strobes, fuel pump etc.) all of
which have an LED on them indicating when the circuits are energized. With a
possible maximum current from as many as 35 LEDs screaming through these two
zeners, determing their lifespan will indeed be an experiment! I suggest you
calculate wattage more fastidiously than I! 8-)
Results are reasonable acceptable, but indicate that all LEDs are not created
equal or operate the same. The annunciator board is reasonably consistent
with the exception of the EIS LEDs (wired both of the two center red LED blocks
to this fuction in parallel with their own resistors) which are dimmer in both
brt and dim when activated by the EIS. My only conclusion is that instead of
a direct ground path supplied by the EIS, there is an electronically switched
path that still has "some" resistance, adding to the total circuit
resistance. I have reduced the supply resistors to these two LED modules from
240 to
120 ohms with improved performance, but still not as bright as the other ones on
the board, particularly in the dim position, but they are still bright enough
to get your attention at night (they flash until acknowledged on the EIS) and
basically equivalent to the others when in the bright position. The rocker
switches universally are a little brighter than I'd prefer with the blue one on
the "FLASH" (wig-wag) switch bright enough to bore a small hole through yer
skull! Individual resistors can be added to the ground connections for these
switches individually and their "volume" attenuated appropriately, however.
Just gotta get around to it!
I'd like to add here that with a "normal" lifespan of approximately 100,000
hours, overdriving these little dudes to even 40 mV for a more
attention-getting appearance is no crime, as their normal duty cycles had better
be measured
in mere seconds or minutes considering their application! Just don't feed 'em
12 volts 'cause they will emulate Neil Young's words in that they will "burn
out" rather rapidly instead of "fade away"!! (Ask Me How I Know This!)
This has been a lot of fun playing with, sometimes frustrating, but indicates
that when trying to "mix & match" these critters that if you like to
experiment, you will have more fun than anyone deserves!! Understand the fundamentals
then proceed with all abandon!!!
Have fun From The PossumWorks in TN
Mark - RV-6A N51PW ready to go to the airport- all electric, "mostly" LED
"almost" flying machine with attitude!!!!!
In a message dated 11/26/2003 6:32:18 PM Central Standard Time,
scott_m_richardson@sbcglobal.net writes:
--> AeroElectric-List message posted by: "'Scott Richardson'"
<scott_m_richardson@sbcglobal.net>
Couple of questions on LED characteristics...
I'm planning on using LED indicators for the annunciator lights on my
panel and most that
I see are rated at 12V or 24V. Am I going to do anything to their
stability or life by running
them at the 13.8V of an aircraft electrical system? or down at the
10.5V of a near-dead
battery? I'm just not sure what the range of acceptable voltages is.
Along these lines, I'd like to but in a bright-dim circuit for all my
annunciators that might be
running them at a voltage in the 5-8V range. Do LED's dim well or do
they have a lower
cutoff voltage where they simply stop producing light.
Thanks for any advice...
Scott
Message 29
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| Subject: | Re: Infernal congestion engines |
--> AeroElectric-List message posted by: John R <jrourke@allied-computer.com>
I'm sure you've heard of Doug Doers, and the 2-stroke diesel he has
designed, built, and is now flying, initial production versions or on a
Velocity and soon several more (beta customers, after 5+ generations of
prototypes over 8+ years)... here's what he has to say about diesel, at
least the 2-stroke variety, in response to a similar question:
"Q: What are you planning to put on for a propeller? I know that
horsepower is going to run around 200, but what about the torque from a
diesel? It could rip the blades off the hub.
A: The torque peaks from the diesel are only about 60% of the peaks
the Lycoming puts out. We have four smaller power pulses per revolution
versus two large peaks from the Lycoming. (They are 4-cycle -- two
cylinders fire per revolution of the propeller. We are 2-cycle -- all
four cylinders fire per revolution of the propeller.) Thus the torque
"ripple" is much less. We never go negative on the torque delivered to
the propeller because we have about 25 degrees of overlap on the power
stroke between cylinders. The four cylinder 4-cycle engine has about 30
degrees of negative torque where the propeller drives the engine. So,
while we haven't finalized the optimal propellers for the engine, it
will not require any special strength considerations."
You can read more at <deltahawkengines.com>
-John R.
George Braly wrote:
>--> AeroElectric-List message posted by: George Braly <gwbraly@gami.com>
>
>
>
>
>>> Not at all. It depends on what you think "less violent"
>>>
>>>
>means.<<
>
> Well... I do know what "less violent" means in the context of an
>engineering analysis of the engine.
>
>Any good textbook on the subject will describe (try Taylor, C.F., ) the
>issue. And it is not what the pilot thinks of the engine in the cockpit.
>
>When one begins to design the engine, the first thing one must define is the
>internal gas pressures above the piston. Diesel engines run about 2x higher
>on average at cruise.
>
>Your two stroke three cylinder inline engine may be subjectively wonderful -
>- in the cockpit - - but it may also play hell with propellers and
>accessories.
>
>Which is why I asked for data, rather than subjective impressions. I have
>a few gigabytes of crankshaft torsional data - - and it sure as the devil
>correlates very closely to peak internal cylinder pressures.
>
>Of course, if one runs it fast enough and then gears down for the prop, you
>can make a really ugly internal combustion engine (diesel or spark ignition)
>appear to be smooth to the folks in the cockpit.
>
>Regards, George
>
>
>---
>
>
>
>
Message 30
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--> AeroElectric-List message posted by: <scott_m_richardson@sbcglobal.net>
Thanks to all who replied to my questions on LED's - lots of useful
info.
Mark,
Your circuit sounds very much like what I was thinking about except that
I intend to use a DPDT on-off-(on) switch with the momentary contact
used
to give me a Dim-Bright-Test arrangement. (I found a smallish C&K
toggle
at Allied for this - Allied #676-3140).
And yes, I would appreciate the Acad/photos of your setup. Thanks!
Scott
Lancair 235/290
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
Fiveonepw@aol.com
Subject: Re: AeroElectric-List: LED questions
--> AeroElectric-List message posted by: Fiveonepw@aol.com
Hi Scott- here are my recent "learnings" FWIW................long-
delete if
not interested!!!
I built a ten-function LED annunciator panel utilizing LED modules from
DigiKey part#404-1145-ND (red) and 404-1146-ND (yellow). These each
have 3 LEDs,
which I connected in series with the appropriate resistors of 240 ohms.
Some
are sinking (if I have my terms unmiscobobulated, these have bus voltage
applied and utilize a switched ground, such as oil pressure, flaps
retracted, canopy
latched and EIS "big red light", etc. The others are "sourced", meaning
they
monitor a voltage applied, such as from the starter energized, fuel pump
on,
fuel low float switch timer output etc.
I connected them using a DPDT miniature switch (Mouser #611-7201-021)
with
direct applied voltage and ground when in the "BRT" position, and zener
diodes
inserted into both sides when in the "DIM" position. If you can read
AutoCad I
can send a dwg and fotos of the completed board. I started out with 4.7
volt
zeners with not enough dimming effect, tried 6.2 volt which while
working
well on the others, rendered the EIS inoperative when activated in the
"dim"
mode. I finally settled on 5.7 volt zeners.
I also employed the same switch to handle the BRT/DIM function for my
main
function rocker switches (landing/taxi lights, strobes, fuel pump etc.)
all of
which have an LED on them indicating when the circuits are energized.
With a
possible maximum current from as many as 35 LEDs screaming through these
two
zeners, determing their lifespan will indeed be an experiment! I
suggest you
calculate wattage more fastidiously than I! 8-)
Results are reasonable acceptable, but indicate that all LEDs are not
created
equal or operate the same. The annunciator board is reasonably
consistent
with the exception of the EIS LEDs (wired both of the two center red LED
blocks
to this fuction in parallel with their own resistors) which are dimmer
in both
brt and dim when activated by the EIS. My only conclusion is that
instead of
a direct ground path supplied by the EIS, there is an electronically
switched
path that still has "some" resistance, adding to the total circuit
resistance. I have reduced the supply resistors to these two LED
modules from 240 to
120 ohms with improved performance, but still not as bright as the other
ones on
the board, particularly in the dim position, but they are still bright
enough
to get your attention at night (they flash until acknowledged on the
EIS) and
basically equivalent to the others when in the bright position. The
rocker
switches universally are a little brighter than I'd prefer with the blue
one on
the "FLASH" (wig-wag) switch bright enough to bore a small hole through
yer
skull! Individual resistors can be added to the ground connections for
these
switches individually and their "volume" attenuated appropriately,
however.
Just gotta get around to it!
I'd like to add here that with a "normal" lifespan of approximately
100,000
hours, overdriving these little dudes to even 40 mV for a more
attention-getting appearance is no crime, as their normal duty cycles
had better be measured
in mere seconds or minutes considering their application! Just don't
feed 'em
12 volts 'cause they will emulate Neil Young's words in that they will
"burn
out" rather rapidly instead of "fade away"!! (Ask Me How I Know This!)
This has been a lot of fun playing with, sometimes frustrating, but
indicates
that when trying to "mix & match" these critters that if you like to
experiment, you will have more fun than anyone deserves!! Understand
the fundamentals
then proceed with all abandon!!!
Have fun From The PossumWorks in TN
Mark - RV-6A N51PW ready to go to the airport- all electric, "mostly"
LED
"almost" flying machine with attitude!!!!!
In a message dated 11/26/2003 6:32:18 PM Central Standard Time,
scott_m_richardson@sbcglobal.net writes:
--> AeroElectric-List message posted by: "'Scott Richardson'"
<scott_m_richardson@sbcglobal.net>
Couple of questions on LED characteristics...
I'm planning on using LED indicators for the annunciator lights on my
panel and most that
I see are rated at 12V or 24V. Am I going to do anything to their
stability or life by running
them at the 13.8V of an aircraft electrical system? or down at the
10.5V of a near-dead
battery? I'm just not sure what the range of acceptable voltages is.
Along these lines, I'd like to but in a bright-dim circuit for all my
annunciators that might be
running them at a voltage in the 5-8V range. Do LED's dim well or do
they have a lower
cutoff voltage where they simply stop producing light.
Thanks for any advice...
Scott
=
==
==
==
==
Message 31
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--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 09:36 PM 11/26/2003 -0600, you wrote:
>--> AeroElectric-List message posted by: George Braly <gwbraly@gami.com>
>
>
> --------------------------------------------
> ( A beginning of the end is marked by )
> ( replacement of experience and common )
> ( sense with policy and procedures. )
> ( R. L. Nuckolls III )
> --------------------------------------------
>
>
> Bob, can I use your quote? The T-34 wing spar issue is
>"heating up" in light of the recent crash near Houston.
>
>
> It is now starting to appear the wing failure was, among
>other issues, due to enormous overloading of the structure. There is a lot
>of concern that the FAA may decide to do the wrong thing with policy and
>procedures! Your quote might come in handy.
The idea was around long before I published it and will be long
after I'm gone . . . feel free to treat it as your own.
Simple-ideas belong to anyone who understands them and can
assemble them into useful systems.
Bob . . .
Message 32
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| Subject: | Infernal congestion engines |
--> AeroElectric-List message posted by: George Braly <gwbraly@gami.com>
John,
Those are interesting comments - - but applying that logic, there would be
no "negative" torque on an eight (four power strokes per 360 degrees)
cylinder engine, either.
But there is.
Even V-12 and V16s have negative torque response on the crank shaft.
In general, more power pulses per revolution tend to make things better ...
but that is also a function of the geometry of the engine. But 1700 PSI
peak cylinder pressures are very high and they happen in a very short period
of time in the diesel - - compared to the spark ignition engine.
If he has not put strain gages on the crankshaft and measured the actual
torque response at high sample rates as a function of crank angle in real
time, then, with all due respect, he is simply speculating. We demonstrate
and display this data in real time at every advanced pilot seminar we
conduct. If he has the data, he should be able to send it to you via a
return email. If he doesn't have the data, well, then take what is said
accordingly.
"Q: What are you planning to put on for a propeller? I know that
horsepower is going to run around 200, but what about the torque from a
diesel? It could rip the blades off the hub.
A: The torque peaks from the diesel are only about 60% of the peaks
the Lycoming puts out. We have four smaller power pulses per revolution
versus two large peaks from the Lycoming. (They are 4-cycle -- two
cylinders fire per revolution of the propeller. We are 2-cycle -- all
four cylinders fire per revolution of the propeller.) Thus the torque
"ripple" is much less. We never go negative on the torque delivered to
the propeller because we have about 25 degrees of overlap on the power
stroke between cylinders. The four cylinder 4-cycle engine has about 30
degrees of negative torque where the propeller drives the engine. So,
while we haven't finalized the optimal propellers for the engine, it
will not require any special strength considerations."
You can read more at <deltahawkengines.com>
-John R.
George Braly wrote:
>--> AeroElectric-List message posted by: George Braly <gwbraly@gami.com>
>
>
>
>
>>> Not at all. It depends on what you think "less violent"
>>>
>>>
>means.<<
>
> Well... I do know what "less violent" means in the context of an
>engineering analysis of the engine.
>
>Any good textbook on the subject will describe (try Taylor, C.F., ) the
>issue. And it is not what the pilot thinks of the engine in the cockpit.
>
>When one begins to design the engine, the first thing one must define is
the
>internal gas pressures above the piston. Diesel engines run about 2x
higher
>on average at cruise.
>
>Your two stroke three cylinder inline engine may be subjectively wonderful
-
>- in the cockpit - - but it may also play hell with propellers and
>accessories.
>
>Which is why I asked for data, rather than subjective impressions. I have
>a few gigabytes of crankshaft torsional data - - and it sure as the devil
>correlates very closely to peak internal cylinder pressures.
>
>Of course, if one runs it fast enough and then gears down for the prop,
you
>can make a really ugly internal combustion engine (diesel or spark
ignition)
>appear to be smooth to the folks in the cockpit.
>
>Regards, George
>
>
>---
>
>
>
>
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