Today's Message Index:
----------------------
1. 06:09 AM - IFR Certification ()
2. 07:11 AM - Re: Reverse flow in Shunt and Hall Effect (Speedy11@aol.com)
3. 07:11 AM - Re: IFR Certification (Speedy11@aol.com)
4. 07:12 AM - Re: Re: Canopy Switch ()
5. 07:17 AM - Re: Burning up Vans Engine Gauges - Part Two. (user9253)
6. 07:17 AM - Re: Measuring voltage on aircraft and engine sensors? (Robert L. Nuckolls, III)
7. 07:43 AM - Re: Re: IFR Certification (Hinde, Frank George (Corvallis))
8. 09:18 AM - Re: Re: IFR Certification ()
9. 09:25 AM - Re: Re: Reverse flow in Shunt and Hall Effect (John Morgensen)
10. 10:09 AM - Help with LCD Circuit Design - Altitude & Heading (mikef)
11. 10:17 AM - Re: Re: Reverse flow in Shunt and Hall Effect (Bret Smith)
12. 11:16 AM - Re: Help with LCD Circuit Design - Altitude & Heading (Etienne Phillips)
13. 12:52 PM - GRETZ heated pitot tube (JOHN TIPTON)
14. 01:41 PM - Re: GRETZ heated pitot tube (Bob Leffler)
15. 02:18 PM - Re: Help with LCD Circuit Design - Altitude & Heading (mikef)
16. 02:34 PM - Re: Help with LCD Circuit Design - Altitude & Heading (Robert L. Nuckolls, III)
17. 02:53 PM - Re: GRETZ heated pitot tube (JOHN TIPTON)
18. 03:56 PM - Re: GRETZ heated pitot tube (Jim Berry)
19. 05:48 PM - Re: IFR Certification (Craig Winkelmann)
20. 07:41 PM - Re: Help with LCD Circuit Design - Altitude & Heading (Mike Fontenot)
21. 08:29 PM - Re: Burning up Vans Engine Gauges - Part Two. (JakeTheBosun)
22. 08:49 PM - Re: Burning up Vans Engine Gauges - Part Two. (JakeTheBosun)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | IFR Certification |
6/11/2009
Hello Stan, You wrote: "This may not be the ideal forum for asking this
question, but I'll try it anyway."
Actually, this is the ideal forum for asking this question.
This topic has been hashed out extensively on the aeroelectric list. If you
are interested in better understanding the situation go to the aeroelectric
archives and search for "encoder approval". You will find many entries under
this search phrase and there are other search phrases that will also
generate past postings on this subject.
To save you some time searching take a look at some of the postings in
August , 2006 with the subject "encoder approval".
You received some good advice in response to your posting copied below --
just go to another agency capable of performing the required 14 CFR 91.411
"IFR certification" tests and have them perform the tests and provide the
paper work. You'll be joining hundreds of other amateur builders happily
flying IFR with non TSO'd altitude encoders that have passed the required
tests of 14 CFR 91.411.
'OC' Says: "The best investment we can make is the effort to gather and
understand knowledge."
PS: Stein Bruch wrote: " Basically the information provided to you is
completely false and not correct."
That is not entirely true. In defense of your local avionics guy he is
taking the same position that FAA headquarters took on the altitude
encoder -- that is, the altitude encoder must either be TSO'd or be tested
in accordance with 14 CFR paragraph 91.217 (b). The tests that FAA
headquarters described for compliance with 91.217 (b) are very elaborate and
extensive.
================================================
Time: 10:23:41 AM PST US
From: Speedy11@aol.com
Subject: AeroElectric-List: IFR Certification
This may not be the ideal forum for asking this question, but I'll try it
anyway.
I want to certify my RV-8 for IFR flight. I know the FARs - I've looked at
them.
I have the Blue Mountain EFIS One as primary instrumentation.
I have the Blue Mountain EFIS Lite as a backup.
Both EFISs are on different electrical busses - the main and the standby.
-
which can be tied together, if needed.
I asked a local avionics guy about doing a pitot-static and transponder
check for IFR. He said I would have to install a separate altimeter and
encoder in order to get IFR certification. The EFIS has a built-in encod
er.
Has anyone else encountered this obstacle?
Stan Sutterfield
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Reverse flow in Shunt and Hall Effect |
Matt and Bob,
Thanks for your responses. You've confirmed my understanding of shunt an
d
HE functions.
I'm using an Advanced Flt Systems AF-3400 and it reads both devices. I'v
e
had external power (regulated power supply) connected to one battery and
I
was getting negative amp indications. So, with the power supply connecte
d
to the battery and electrical consumers turned on, the shunt/HE will show
a negative amperage.
I'll be running the engine again in a few days and I'll check to make sur
e
amps are positive with normal alternator operation.
Stan
Yes.. Current going the opposite direction through the shunt will
generate a negative voltage. The sensor connected to the shunt should
interpret/display that as a negative current.
**************Dell Deals: Don=99t miss huge summer savings on popula
r laptops
starting at $449.
=http:%2F%2Fad.doubleclick.net%2Fclk%3B215566131%3B37864407%3B
i)
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: IFR Certification |
Thanks for all the responses.
I will use this guy to do the initial VFR certification because he will
come to me rather than me having to take the airplane to him. Then maybe
I'll just fly it to Stein's place and get him to do the IFR cert for me.
: )
Stan Sutterfield
This is a rather common occurance by shops that are either uneducated or
inexperienced with experimental aircraft. Sometimes it's also as a resul
t
of naiive FSDO people as well. Basically the information provided to you
is
completely false and not correct. The EFIS with it's encoder is just
fine....so is it's altimeter - assuming both will pass an IFR check. We
have our FAA Repair Station Certification and do a lot of said pitot stat
ic
and/or transponder checks on both certified and experimentals. Should be
no
problem if you find the right people or right shop.
**************Dell Deals: Don=99t miss huge summer savings on popula
r laptops
starting at $449.
=http:%2F%2Fad.doubleclick.net%2Fclk%3B215566131%3B37864407%3B
i)
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Canopy Switch |
Thanks to all for the suggestions. It sounds like the best solution is
to find a switch that fits the geometry of my latch and work it from
there (more fun there). I'm also checking on a pitot pressure switch or
throttle up switch as a backup.
Glenn
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
bcondrey
Sent: Wednesday, June 10, 2009 10:53 PM
Subject: AeroElectric-List: Re: Canopy Switch
<bob.condrey@baesystems.com>
The mechanism referred to in RV-10s is a simple magnetic reed switch
arrangement. There is a magnet in each door pin and the reed switches
mounted in the door frames.
Bob
RV-10 N442PM
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=247644#247644
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Burning up Vans Engine Gauges - Part Two. |
Jake,
What is the ambient temperature around your gauges? That could be a factor. The
most likely cause of failure to a voltmeter is excessively high voltage. AC
voltage applied to some instruments designed for DC could also cause damage.
But you had the diodes checked out. And an AC component would be noticed in
your headset. Since you are not having problems with other electrical devices
on your airplane, it is unlikely that the aircraft electrical system is causing
failure of your instruments unless there is something unique about the power
being applied to the instruments.
I suggest that you replace the analog voltmeter with a digital one. A high
quality digital voltmeter should be immune to whatever your electrical system
throws at it. If after flying with the new digital meter and observing the voltage,
the other instruments can be replaced.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=247674#247674
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Measuring voltage on aircraft and engine sensors? |
At 02:11 PM 6/10/2009, you wrote:
><mosquito-56@hotmail.com>
>
>I am trying to connect my aircraft to a microcontroller and some adc's.
>
>Will a hall effect rpm sensor work on 5vdc?
Get the data sheet for the sensor you plan to use.
The HE devices I've used in the past to look at
shaft rpms were quite happy with 5v supply. I
suspect most are but the manufacturer's data
sheet is the last word.
>Are the oil temp and oil pressure sensors just pots?
I presume you're building from scratch. Temperature
and pressure sensors come in lots of flavors.
I personally favor the use of thermocouples for
all temperature measurements. These are most
easily adapted to the 5v microprocessor world
with thermocouple conditioning chips like the
AD594 series.
http://www.mne.psu.edu/sommer/me445/AD594_5_c.pdf
But there are numerous other products using
thermo-resistive sensors to choose from. The
nice thing about thermocouples is that they're
calibrated right off the roll of wire. Pressure
transducers these days are usually amplified
piezo-resistive device like . . .
Emacs!
These can be pretty pricey compared to the automotive
devices that behave pretty much like a rheostat.
Emacs!
You can adapt about anything to your task when
starting from a clean piece of paper.
Bob . . .
---------------------------------------
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
---------------------------------------
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: IFR Certification |
Don't if it was legal but I didn't do a VFR cert..I just labeled the Transp
onder "Inooperative" and flew it to get the IFR cert done...Why pay twice i
f you don't have to?
Frank
________________________________
From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectr
ic-list-server@matronics.com] On Behalf Of Speedy11@aol.com
Sent: Thursday, June 11, 2009 7:11 AM
Subject: AeroElectric-List: Re: IFR Certification
Thanks for all the responses.
I will use this guy to do the initial VFR certification because he will com
e to me rather than me having to take the airplane to him. Then maybe I'll
just fly it to Stein's place and get him to do the IFR cert for me. : )
Stan Sutterfield
This is a rather common occurance by shops that are either uneducated or
inexperienced with experimental aircraft. Sometimes it's also as a result
of naiive FSDO people as well. Basically the information provided to you i
s
completely false and not correct. The EFIS with it's encoder is just
fine....so is it's altimeter - assuming both will pass an IFR check. We
have our FAA Repair Station Certification and do a lot of said pitot static
and/or transponder checks on both certified and experimentals. Should be n
o
problem if you find the right people or right shop.
________________________________
Dell Deals: Don't miss huge summer savings on popular laptops starting at $
r=http:%2F%2Fad.doubleclick.net%2Fclk%3B215566131%3B37864407%3Bi>
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: IFR Certification |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Message 9
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Reverse flow in Shunt and Hall Effect |
Speedy11@aol.com wrote:
> I'm using an Advanced Flt Systems AF-3400 and it reads both devices.
> I've had external power (regulated power supply) connected to one
> battery and I was getting negative amp indications. So, with the
> power supply connected to the battery and electrical consumers turned
> on, the shunt/HE will show a negative amperage.
I am just starting the wiring on my AFS 3500 so I am probably confused,
but I thought the shunt and Hall Effect were mutually exclusive. I plan
to run both alternators (Z13/8) through the HE as shown on page 42 of
the AF3500 System Manual V5.3. Am I missing something?
John Morgensen
RV9A - wiring
Message 10
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Help with LCD Circuit Design - Altitude & Heading |
Hi,
I am interested in building a simple, small, bright LCD display that can increment
numbers with the twist of a knob. I would like to build a 4 digit and 3 digit
versions, to represent pattern altitude and heading, respectively. Put it
in a small enclosure and mount on my dash.
Pattern altitude - knob changes in 100' increments
Heading - knob changes in 10 degree increments. Would be nice to go from 0 to 360,
then roll back over to zero (0).
I know you knowledgeable electronics guys are thinking this is stone simple, but....
I'm a noob. I don't know which parts to mix and match to make this happen.
And while having googled lots of stuff, I am still unsure how to pick the right
parts to make this work. So if someone in the know could suggest the right
combination of parts it would be most appreciated.
Here is a commercial version that inspired my request here. But sweet jeeezus,
at $400 that is just plain outrageous for what I bet cost maybe $50.
http://www.p2inc.com/skybuddy.asp
Thanks in advance!
Mike
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=247702#247702
Message 11
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Reverse flow in Shunt and Hall Effect |
I'm wired for 13/8 and use the AFS3500's. I went with two shunts; one
FWF for the main alt and another cabin-side for the SD-8. I had the
main alt shunt reading negatively at first and only had to reverse the
wires to the AFS unit.
HTH
Bret Smith
RV-9A N16BL
Blue Ridge, GA
www.FlightInnovations.com
----- Original Message -----
From: John Morgensen
To: aeroelectric-list@matronics.com ; Speedy11@aol.com
Sent: Thursday, June 11, 2009 12:23 PM
Subject: Re: AeroElectric-List: Re: Reverse flow in Shunt and Hall
Effect
Speedy11@aol.com wrote:
I'm using an Advanced Flt Systems AF-3400 and it reads both devices.
I've had external power (regulated power supply) connected to one
battery and I was getting negative amp indications. So, with the power
supply connected to the battery and electrical consumers turned on, the
shunt/HE will show a negative amperage.
I am just starting the wiring on my AFS 3500 so I am probably
confused, but I thought the shunt and Hall Effect were mutually
exclusive. I plan to run both alternators (Z13/8) through the HE as
shown on page 42 of the AF3500 System Manual V5.3. Am I missing
something?
John Morgensen
RV9A - wiring
Message 12
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Help with LCD Circuit Design - Altitude & Heading |
If I were looking at a similar project, I would consider using a
microprocessor, 7-segment LED displays (or a backlit LCD for good
sunlight readability), and two quadrature jogdials. It's not a simple
solution though, and I'd be hesitant to encourage you to attempt this
solution as a novice due to the combined software and hardware nature
of the microprocessor...
Total electronics cost (assuming you have all the required tools and
a programmer) in the order of $15, then you'll need an enclosure of
some sort. Maybe another $15-$20. Certainly do-able for waaaaay less
than $400.
Hope this inspires some other answers, hopefully with a simpler
solution that would make a good project for a beginner :-)
Etienne
Very simple from a hardware perspective, and the code for the
microprocessor is not too hard. However, I'm not a noob (BSc in
Electrical Engineering ;-) ), and I have all the required tools on hand!
On 11 Jun 2009, at 7:06 PM, mikef wrote:
>
> Hi,
>
> I am interested in building a simple, small, bright LCD display
> that can increment numbers with the twist of a knob. I would like
> to build a 4 digit and 3 digit versions, to represent pattern
> altitude and heading, respectively. Put it in a small enclosure and
> mount on my dash.
>
> Pattern altitude - knob changes in 100' increments
> Heading - knob changes in 10 degree increments. Would be nice to go
> from 0 to 360, then roll back over to zero (0).
>
> I know you knowledgeable electronics guys are thinking this is
> stone simple, but.... I'm a noob. I don't know which parts to mix
> and match to make this happen. And while having googled lots of
> stuff, I am still unsure how to pick the right parts to make this
> work. So if someone in the know could suggest the right combination
> of parts it would be most appreciated.
>
> Here is a commercial version that inspired my request here. But
> sweet jeeezus, at $400 that is just plain outrageous for what I bet
> cost maybe $50.
>
> http://www.p2inc.com/skybuddy.asp
>
> Thanks in advance!
>
> Mike
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=247702#247702
>
>
Message 13
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | GRETZ heated pitot tube |
Hi Guys
Has anyone cut off the LEDs from the control unit (of the Gretz heated
pitot tube product) and mounted it remotely, and then mounted the LEDs
on their own wires to the panel - if so: how did you get on, any
problems ???
Regards
John (England - RV9a wings)
Message 14
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | GRETZ heated pitot tube |
I'm confused on what you are attempting to accomplish.
The LEDs aren't on the control unit, they are on a separate circuit board.
This allows them to be remotely mounted. I would leave them on the board to
add more strength to the mounting point for the LEDS. There is nothing
magical about that circuit other than a resistor and LED. You should be
able to reverse engineer the traces by looking at the board. Or you could
just give Andrew at Angus Aviation a call. Just remember that he's
fourteen hours ahead of us.
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of JOHN
TIPTON
Sent: Thursday, June 11, 2009 3:51 PM
Subject: AeroElectric-List: GRETZ heated pitot tube
Hi Guys
Has anyone cut off the LEDs from the control unit (of the Gretz heated pitot
tube product) and mounted it remotely, and then mounted the LEDs on their
own wires to the panel - if so: how did you get on, any problems ???
Regards
John (England - RV9a wings)
Message 15
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Help with LCD Circuit Design - Altitude & Heading |
Etienne,
Thanks for your note. It is educational. I'll keep the info in mind.
Mike
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=247727#247727
Message 16
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Help with LCD Circuit Design - Altitude & Heading |
At 12:06 PM 6/11/2009, you wrote:
>
>Hi,
>
>I am interested in building a simple, small, bright LCD display that
>can increment numbers with the twist of a knob. I would like to
>build a 4 digit and 3 digit versions, to represent pattern altitude
>and heading, respectively. Put it in a small enclosure and mount on my dash.
>
>Pattern altitude - knob changes in 100' increments
>Heading - knob changes in 10 degree increments. Would be nice to go
>from 0 to 360, then roll back over to zero (0).
>
>I know you knowledgeable electronics guys are thinking this is stone
>simple, but.... I'm a noob. I don't know which parts to mix and
>match to make this happen. And while having googled lots of stuff, I
>am still unsure how to pick the right parts to make this work. So if
>someone in the know could suggest the right combination of parts it
>would be most appreciated.
>
>Here is a commercial version that inspired my request here. But
>sweet jeeezus, at $400 that is just plain outrageous for what I bet
>cost maybe $50.
If all you're wanting is a reminder why go
electronic. Pure mechanical works too. See:
http://tinyurl.com/mpjq8u
In years past I've seen installations of thumbwheel
switches mounted to allow dialing in a number to
be prompted. No electronics required.
What you're wanting to do would take quite a bit
of time . . . that $400 price for a low
volume product was probably not all that
outrageous.
Bob . . .
---------------------------------------
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
---------------------------------------
Message 17
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: GRETZ heated pitot tube |
Yes: I meant the separate circuit board: it does seem to be a lot of
weight (relatively) to hang on the three LEDs
John
----- Original Message -----
From: Bob Leffler
To: aeroelectric-list@matronics.com
Sent: Thursday, June 11, 2009 9:45 PM
Subject: RE: AeroElectric-List: GRETZ heated pitot tube
I'm confused on what you are attempting to accomplish.
The LEDs aren't on the control unit, they are on a separate circuit
board. This allows them to be remotely mounted. I would leave them on
the board to add more strength to the mounting point for the LEDS.
There is nothing magical about that circuit other than a resistor and
LED. You should be able to reverse engineer the traces by looking at
the board. Or you could just give Andrew at Angus Aviation a call.
Just remember that he's fourteen hours ahead of us.
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of JOHN
TIPTON
Sent: Thursday, June 11, 2009 3:51 PM
To: aeroelectric-list@matronics.com
Subject: AeroElectric-List: GRETZ heated pitot tube
Hi Guys
Has anyone cut off the LEDs from the control unit (of the Gretz heated
pitot tube product) and mounted it remotely, and then mounted the LEDs
on their own wires to the panel - if so: how did you get on, any
problems ???
Regards
John (England - RV9a wings)
http://www.matronics.com/Navigator?AeroElectric-Listhttp://forums.matroni
cs.comhttp://www.matronics.com/contribution
Message 18
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: GRETZ heated pitot tube |
John,
I eliminated the Gretz LED's and mounting board altogether. Replaced them with
3 new LED's epoxied from the back of my panel, and wired without the mounting
board. Works fine.
Jim Berry
RV10
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=247739#247739
Message 19
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: IFR Certification |
Recently had my Blue Mountain Sport (new install) calibrated and certified. Not
an issue.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=247760#247760
Message 20
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Help with LCD Circuit Design - Altitude & Heading |
Bob,
That is a good idea. Thanks!
Mike
On Thu, Jun 11, 2009 at 3:32 PM, Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 12:06 PM 6/11/2009, you wrote:
>
>
> Hi,
>
> I am interested in building a simple, small, bright LCD display that can
> increment numbers with the twist of a knob. I would like to build a 4 digit
> and 3 digit versions, to represent pattern altitude and heading,
> respectively. Put it in a small enclosure and mount on my dash.
>
> Pattern altitude - knob changes in 100' increments
> Heading - knob changes in 10 degree increments. Would be nice to go from 0
> to 360, then roll back over to zero (0).
>
> I know you knowledgeable electronics guys are thinking this is stone
> simple, but.... I'm a noob. I don't know which parts to mix and match to
> make this happen. And while having googled lots of stuff, I am still unsure
> how to pick the right parts to make this work. So if someone in the know
> could suggest the right combination of parts it would be most appreciated.
>
> Here is a commercial version that inspired my request here. But sweet
> jeeezus, at $400 that is just plain outrageous for what I bet cost maybe
> $50.
>
>
> If all you're wanting is a reminder why go
> electronic. Pure mechanical works too. See:
>
> * http://tinyurl.com/mpjq8u*
>
> In years past I've seen installations of thumbwheel
> switches mounted to allow dialing in a number to
> be prompted. No electronics required.
>
> What you're wanting to do would take quite a bit
> of time . . . that $400 price for a low
> volume product was probably not all that
> outrageous.
>
>
> Bob . . .
>
> ---------------------------------------
> ( . . . a long habit of not thinking )
> ( a thing wrong, gives it a superficial )
> ( appearance of being right . . . )
> ( )
> ( -Thomas Paine 1776- )
> ---------------------------------------
>
>
> *
>
> *
>
>
--
Mike
===============================
Mike Fontenot
Apex Consulting & Services LLC
Lakewood, Colorado
303 / 731-6645
mikef AT apexconsultingservices DOT com
===============================
Message 21
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Burning up Vans Engine Gauges - Part Two. |
mprather(at)spro.net wrote:
> Interesting..
>
> Can you see what in the instrument is fried? Is it a component connected
> to the V+ or from the signal/sensor (or something else)?
>
> The resistor on +ve Voltage into instrument burned
>
> I assume the 14.2V value is measured on the instrument supply (V+)
> terminal. Can you compare this with the voltage at the bus.
>
> Yes, was same.
>
> Can you measure the voltage drop between the instrument (display) ground
> and the engine ground (with the engine running)? I understand that all of
> the connections appear solid.
>
> I will do this. I think it was same.
>
> Have you done any recent maintenance or mods?
>
> No
>
> Thanks for taking time to answer..
>
> Regards,
>
> Matt-
>
>
> >
> >
> >
> > Well I'm stumped....my simple RV8, basic analog instruments only, Nipon
> > Denso 40 amp Alternator, Oddeysey battery, worked well for 200 hours.
> >
> > Saturday Volt Meter burned (resistor on circuit board overheated and
> > melted case), then Oil Temperature gauge did same thing, now today while
> > testing Manifold Pressure full of smoke.
> >
> > I have;
> > -checked - no loose wires found ground or power.
> > -Good Battery-engine-ground (heavy cable, short runs, tight connections.)
> > -Good bus connections (one central ground bus located at firewall)
> > -14.2 Volts on meter at gauges while running, but instruments overheat.
> > -12+ volts on meter when engine stopped, instruments seem not to overheat.
> > -Removed alternator and took to shop for evaluation....tested on stand and
> > found good output and diodes.
> >
> >
> > Anybody got a next step? Nice weather........need to fly
> > George
> >
> > --------
> > Jake
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p 47617#247617
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
--------
Jake
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=247770#247770
Message 22
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Burning up Vans Engine Gauges - Part Two. |
Just an update ...thanks to those who answered;
I have performed no modifications except annual inspection and wash.
The instruments burn up the resistor on the +ve supply into the circuit board inside
instruments. The 14.2 V is at instrument. Fooling around measuring power
to ground at many places seems very consistent.
The ambient temperature is not too high (especially compared to you guys in Southern
US).
On osciloscope today, we found .004 V AC in the alternator current. This seems
pretty low to me?
Nothing else currently having problems.
Today we also removed the battery -ve cable cleaned it and put it to engine where
we connected the cable to the firewall ground post. All cables are # 2 and
about 18" long.
I did notice the negative post on the battery moves just ever so slightly as I
tightened the post back on, not very much just enough to notice.
I also see the alternator is spinning at top of the rated RPM, but easily within
the 10% the alternator shop taked of.
Thanks again you guys.
--------
Jake
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=247771#247771
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|