Today's Message Index:
----------------------
1. 07:09 AM - Re: CPC's (BobsV35B@aol.com)
2. 07:14 AM - Re: Questions about the 9005 Low Voltage Module (Robert L. Nuckolls, III)
3. 07:38 AM - Re: CPC's (Werner Schneider)
4. 07:45 AM - Re: CPC's (ROGER & JEAN CURTIS)
5. 08:23 AM - Re: CPC's (Tim Andres)
6. 08:23 AM - Re: CPC's (Tim Andres)
7. 08:34 AM - Re: CPC's (BobsV35B@aol.com)
8. 08:35 AM - Re: CPC's (BobsV35B@aol.com)
9. 08:39 AM - Re: is battery filter or dead weight? (Jan de Jong)
10. 08:48 AM - Re: CPC's (Robert L. Nuckolls, III)
11. 09:42 AM - Re: CPC's (Robert L. Nuckolls, III)
12. 10:11 AM - Re: is battery filter or dead weight? (Robert L. Nuckolls, III)
13. 10:57 AM - IR Alternator Voltage ()
14. 01:11 PM - Re: IR Alternator Voltage (Robert L. Nuckolls, III)
15. 04:03 PM - Re: Questions about the 9005 Low Voltage Module (Jared Yates)
16. 11:35 PM - Pull-up resistors (Tim Andres)
Message 1
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Good Morning Werner,
My understanding is that the D-subminiature DB is a twenty-five pin
connector whereas a DE-9 is a nine pin connector. Where have I gone wrong?<G>
Happy Skies,
Old Bob
In a message dated 1/4/2011 1:31:49 A.M. Central Standard Time,
glastar@gmx.net writes:
--> AeroElectric-List message posted by: Werner Schneider
<glastar@gmx.net>
This are from Tycoelectronics:
<http://www.tycoelectronics.com/catalog/minf/en/645>
and here 493 products:
<http://www.tycoelectronics.com/catalog/feat/en/c/10574?BML=10576,17560,2364
5,17584,17760>
bulkier then the db9 I use but if you need more then 9 pins they might
be your choice.
Werner
> Can anyone tell me the part numbers for the connectors he's using? I'd
> like to use these for the stick grips and a few other places. I would
Message 2
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| Subject: | Re: Questions about the 9005 Low Voltage Module |
At 09:28 PM 1/3/2011, you wrote:
>That's great information, thank you for your help! I found the
>Digikey invoice and I think I might have ordered the wrong part.
>
>The national part is the Digikey LM285Z-2.5-ND
><http://www.national.com/ds/LM/LM185-2.5.pdf>http://www.national.com/ds/LM/LM185-2.5.pdf
>
>The one that I ordered is made by ON Semiconductor, Digikey LM285Z-2.5GOS-ND.
><http://www.onsemi.com/pub_link/Collateral/LM285-D.PDF>http://www.onsemi.com/pub_link/Collateral/LM285-D.PDF
>
I don't think so. The LM series devices are National
Semiconductor originations. All competing manufacturers
have to put out a drop in duplicate of the part.
If the voltage at U107-3 had been zero or identical
to an adjacent pin, then I would suspect a solder
splash or an ECB defect often called a 'cat hair'.
The fact that your measurement is unique and way out
of whack for what the LM285 should present suggests
that neither event is in force. You might check
markings or color code for the R104 . . . make sure
it.s a 4.7K and not something higher. Also re-flow
the solder joins on R104. It's extremely rare that a
new part is bad out of the box so if the LM285 is
not installed wrong, we need to explore other possible
causes for U107-3 voltage not to be 2.50 volts.
Bob . . .
Message 3
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Hello "old" Bob,
you are certainly right Sir and I'm wrong ;)
D shell and 2nd letter is size so it would be DE:
<http://en.wikipedia.org/wiki/D-subminiature> (I've learned something new :)
But I'm excused coming from the computer side (read 5th Paragraph)
.....to see DE9 connectors sold as "DB9" connectors. DB-9 is nearly
always intended to be a 9 pin connector with an E size shell.
Werner
On 04.01.2011 16:05, BobsV35B@aol.com wrote:
> Good Morning Werner,
> My understanding is that the D-subminiature DB is a twenty-five pin
> connector whereas a DE-9 is a nine pin connector. Where have I gone
> wrong?<G>
> Happy Skies,
> Old Bob
> In a message dated 1/4/2011 1:31:49 A.M. Central Standard Time,
> glastar@gmx.net writes:
>
> <glastar@gmx.net>
>
> This are from Tycoelectronics:
>
> <http://www.tycoelectronics.com/catalog/minf/en/645>
>
> and here 493 products:
>
> <http://www.tycoelectronics.com/catalog/feat/en/c/10574?BML=10576,17560,23645,17584,17760>
>
> bulkier then the db9 I use but if you need more then 9 pins they might
> be your choice.
>
> Werner
>
>
> > Can anyone tell me the part numbers for the connectors he's
> using? I'd
> > like to use these for the stick grips and a few other places. I
> ========================= Use utilities Day
> ================================================ - MATRONICS WEB
> FORUMS ================================================ - List
> Contribution Web Site sp;
> ==================================================
>
>
> *
>
>
> *
Message 4
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My understanding is that the D-subminiature DB is a
twenty-five pin connector whereas a DE-9 is a nine pin connector. Where
have
I gone wrong?<G>
Happy Skies,
Old Bob
The D subminiature series is inclusive of
the 9 and 25 pin connectors.
Roger
Message 5
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On 1/3/2011 11:06 PM, Don wrote:
> --> AeroElectric-List message posted by: "Don"<dsvs@ca.rr.com>
>
> That is a Danials crimper and the pins and sockets are machined . Steinair
> has both.
>
Thanks; I have the pins & crimper, that's why I wanted to use the
specific connector he's using. The problem is there are hundreds of
choices from either Tyco or Amp, and all the ones I could find used the
molex type crimped pin vs. the D-sup machined pins I'm familiar with.
I'll keep looking or call Allied for help.
Thanks, Tim Andres
Message 6
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Ok great Don! thats what I could not find.
Tim
Message 7
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Sounds fair to me!
Happy Skies,
Old Bob
In a message dated 1/4/2011 9:39:27 A.M. Central Standard Time,
glastar@gmx.net writes:
--> AeroElectric-List message posted by: Werner Schneider <glast
ar@gmx.net>
Hello "old" Bob,
you are certainly right Sir and I'm wrong ;)
D shell and 2nd letter is size so it would be DE:
<http://en.wikipedia.org/wiki/D-subminiature> (I've learned something new
:)
But I'm excused coming from the computer side (read 5th Paragraph)
.....to see DE9 connectors sold as "DB9" connectors. DB-9 is nearly
always intended to be a 9 pin connector with an E size shell.
Werner
On 04.01.2011 16:05, BobsV35B@aol.com wrote:
> Good Morning Werner,
> My understanding is that the D-subminiature DB is a twenty-five pin
> connector whereas a DE-9 is a nine pin connector. Where have I gone
> wrong?<G>
> Happy Skies,
> Old Bob
> In a message dated 1/4/2011 1:31:49 A.M. Central Standard Time,
> glastar@gmx.net writes:
>
> <glastar@gmx.net>
>
> This are from Tycoelectronics:
>
> <http://www.tycoelectronics.com/catalog/minf/en/645>
>
> and here 493 products:
>
>
<http://www.tycoelectronics.com/catalog/feat/en/c/10574?BML=10576,17560,23645,17584,17760>
>
> bulkier then the db9 I use but if you need more then 9 pins they might
> be your choice.
>
> Werner
>
>
> > Can anyone tell me the part numbers for the connectors he's
> using? I'd
> > like to use these for the stick grips and a few other places. I
> ========================= Use utilities Day
> ================================================ - MATRONICS WEB
> FORUMS ================================================ - List
> Contribution Web Site sp;
> ==================================================
>
>
> *
>
>
> *
Message 8
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Good Morning Roger,
That is true and the DA is 15, DB is 25, DC is 37, DD is 50 and DE is 9.
Did I say or imply otherwise?
Happy Skies,
Old Bob
In a message dated 1/4/2011 9:46:08 A.M. Central Standard Time,
mrspudandcompany@verizon.net writes:
The D subminiature series is inclusive of
the 9 and 25 pin connectors.
Roger
Message 9
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| Subject: | is battery filter or dead weight? |
Thank you very much for confirming my model of lead-acid battery.
So battery is:
- backup energy source
- engine starting energy source
- overvoltage slowdown load
- negligible filter
Ultracap is fascinating but it is hard to find a compelling use.
With http://www.maxwell.com/docs/DATASHEET_K2_SERIES_1015370.PDF
one could make a 100F, 16.2V, 5mOhm capacitor weighing 1 kg for $500 or so.
Multiple seconds of starting amps.
Leakage 1.5 mA or more than 1Ah per month though.
And would need six 2.75V 0.5A or so power zeners made and very reliable OVP.
For $150 or so one could make a 8Ah, 13.2V, 8mOhm LiFePO4 battery
weighing 1.5 kg or so:
http://www.evassemble.com/index.php?main_page=index&cPath=2&zenid=s0l174nirkm5s4ltndf75rt9f2
Minutes of starting amps.
Leakage 0.3 mA or so.
Would need four 3.75V full charging current power zeners made and a
heatsink temperature controlled alternator switch.
Function then automatically includes 15V OVP.
Alternator needs set at 14.6V.
And not very good at low temperatures:
http://www.lifebatt.com/sandiareport.pdf
Jan de Jong
Message 10
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At 10:05 AM 1/4/2011, you wrote:
>Good Morning Werner,
>
>My understanding is that the D-subminiature DB is a twenty-five pin
>connector whereas a DE-9 is a nine pin connector. Where have I gone wrong?<G>
>
>Happy Skies,
The second letter after the D in some folks catalogs
refer to a shell size. The original D series was A thru
D for 15 thru 50 pins. I think the 9 pin was added later
and they gave it an out-of-sequence letter "E"
See
http://aeroelectric.com/Mfgr_Data/Connectors/ITT_Cannon/dsub_accessories.pdf
Bob . . .
Message 11
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I have the pins & crimper, that's why I wanted to use the specific
connector he's using. The problem is there are hundreds of choices
from either Tyco or Amp, and all the ones I could find used the molex
type crimped pin vs. the D-sup machined pins I'm familiar with.
Goto http://digikey.com
Do search on amp cpc -> circular housings (330 items) -> then Contact size 20
There you will find a listing of a limited number of
sizes for the CPC connectors that accept the 20 AWG
machined pins (a la D-sub). This series is described
in AMP document
http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=1441934&k=cpc%20series%202
in top paragraphs of column 2 on both pages.
As you can see. This particular connector is not
available in many sizes. It's also more expensive
than D-subs and is bulkier than a trimmed down
dsub described on the website.
http://aeroelectric.com/articles/macservo/macservo.html
If you need more than 9 wires, use two connectors
and flip the sex for the connectors so that they
cannot be mis-mated.
Bob . . .
Bob . . .
Message 12
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| Subject: | is battery filter or dead weight? |
At 11:36 AM 1/4/2011, you wrote:
>
>Thank you very much for confirming my model of lead-acid battery.
>So battery is:
>- backup energy source
>- engine starting energy source
>- overvoltage slowdown load
>- negligible filter
<snip>
What you have discovered is that not every
"problem" is begging to be solved. A proposed
advancement to the state of our art needs to be
evaluated for a host of unknowns . . .
What's the impetus for 'solving' this 'problem'?
Will anything on the airplane work better if the
bus noise is reduced? What is the probability
that making this change will add any observable
or measurable value for the way I use my airplane?
What does it cost to own this feature over the next
10 years?
Burt Rutan beat us up for grams of weight savings
but didn't care if the system was any quieter than
what you might find in a C-172. I don't know what
size batteries he ended up with . . . but you can
bet it was a carefully considered decision. When
I was asked to convert a LongEz into a spook airplane
loaded with sensitive receivers, noise became the
paramount issue. Whole different mission.
The point is that latching onto the latest and
greatest electro-whizzy may or may not have a
return on investment. Throughout our culture,
there's an almost primal urge to step up to
the new and improved but without regard to
whether or not the thing being replaced really
needs to be replaced.
If I were to rent an airplane tomorrow, I'd be
just as comfortable navigating to intended
destination using the Wallmart Magellan
GPS I introduced to The OBAM aircraft industry
13 years ago.
http://aeroelectric.com/articles/nailgun.pdf
But MOST important, make sure that the proposed
change is integrated into the system with thoughtful
understanding of all the simple-ideas that makes
the thing work. It will reduce if not eliminate those
"Aw #$#%" moments in the cockpit.
Bob . . .
Message 13
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| Subject: | IR Alternator Voltage |
Good Afternoon,
I am using a Lamar 80 Amp Internally Regulated Alternator which is
currently charging at 13 volts. That often puts my B & C low voltage
indicator in the blinkety-blinkety state.
Sorry, I don't have the model specifics with me (can get later) but off
the top are there ways to adjust the output of IR type alternators or is
that a factory setting that cannot be changed? Is this an "it depends"
item?
Thanks,
Glenn Long
Message 14
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| Subject: | Re: IR Alternator Voltage |
At 01:53 PM 1/4/2011, you wrote:
>
>Good Afternoon,
>
>I am using a Lamar 80 Amp Internally Regulated Alternator which is
>currently charging at 13 volts. That often puts my B & C low voltage
>indicator in the blinkety-blinkety state.
Yup, they'll do that . . .
>Sorry, I don't have the model specifics with me (can get later) but off
>the top are there ways to adjust the output of IR type alternators or is
>that a factory setting that cannot be changed? Is this an "it depends"
>item?
Probably not. I've never seen an adjustable regulator on
an internally regulated machine. In fact, most external
regulators were not adjustable either.
Before you take a wrench to the airplane, check the
alternator output voltage at the alternator's b-terminal.
The internal regulator senses b-terminal voltage and
there MAY be a difference. You can probably buy a
replacement regulator but depending on the alternator,
it might be lest hassle/expense to trade it in.
Bob . . .
Bob . . .
Message 15
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| Subject: | Re: Questions about the 9005 Low Voltage Module |
Here's a picture. I think the resistors are right, but perhaps I'm
overlooking something that will seem obvious to someone with more
experience.
On Tue, Jan 4, 2011 at 10:11 AM, Robert L. Nuckolls, III
<nuckolls.bob@aeroelectric.com> wrote:
> At 09:28 PM 1/3/2011, you wrote:
>
> That's great information, thank you for your help!- I found the Digikey
> invoice and I think I might have ordered the wrong part.
>
> The national part is the Digikey LM285Z-2.5-ND
> http://www.national.com/ds/LM/LM185-2.5.pdf
>
> The one that I ordered is made by ON Semiconductor, Digikey
> LM285Z-2.5GOS-ND.
> http://www.onsemi.com/pub_link/Collateral/LM285-D.PDF
>
>
> - I don't think so. The LM series devices are National
> - Semiconductor originations. All competing manufacturers
> - have to put out a drop in duplicate of the part.
>
> - If the voltage at U107-3 had been zero or identical
> - to an adjacent pin, then I would suspect a solder
> - splash or an ECB defect often called a 'cat hair'.
> - The fact that your measurement is unique and way out
> - of whack for what the LM285 should present suggests
> - that neither event is in force. You might check
> - markings or color code for the R104 . . . make sure
> - it.s a 4.7K and not something higher. Also re-flow
> - the solder joins on R104. It's extremely rare that a
> - new part is bad out of the box so if the LM285 is
> - not installed wrong, we need to explore other possible
> - causes for U107-3 voltage not to be 2.50 volts.
>
>
> - Bob . . .
>
===========
===========
===========
===========
>
Message 16
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| Subject: | Pull-up resistors |
I'm connecting a GNS430w to a pair of GRT MFD's. GRT calls for 10k ohm
pull up resistors to be used on 4 of the interconnects between the MFD's
and the Garmin, these resistors are fed with 12VDC and
"T" 'd into the harness.
http://www.grtavionics.com/File/Wiring%20Diagrams/WD-1007-01.pdf
All this equipment provides for multiple feed paths, and I have fed all
3 from the E-Bus and my Aux bus. I have read that the Garmin will be
damaged if these pull ups are not used. So to prevent this in the case
of power from the AUX only I built a little pull up network using on a
DB25 for a "Home" (Thanks Bob) and fed it from both bus's (E & AUX).
Each bus has a 1N4004 diode installed prior to feeding the 4 resistors
to prevent the bus's from back feeding. Still with me?
OK so I check it out when done with my Ohmmeter and discover that
instead of 10K ohms I have 326K ohms. All but 10K of it of course is
from the Diodes. I knew the Diodes had a forward voltage drop, but
didn't realize it was this much.
What to do?
Thanks, Tim Andres
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