Today's Message Index:
----------------------
1. 06:42 AM - twisted pair tefzel (Glen Matejcek)
2. 08:12 AM - RPM Hall efforct sensor (fedico94@mchsi.com)
3. 08:25 AM - Re: RPM Hall efforct sensor (Harley)
4. 09:05 AM - Re: OS Wig-Wag Project (gregmchugh)
5. 09:34 AM - Re: RPM Hall efforct sensor (Rob Kochman)
6. 09:41 AM - Re: NAV splitter grounded? (Rob Kochman)
7. 10:27 AM - Re: RPM Hall efforct sensor (fedico94@mchsi.com)
8. 10:27 AM - Re: Re: OS Wig-Wag Project (Robert L. Nuckolls, III)
9. 10:28 AM - Re: NAV splitter grounded? (David Lloyd)
10. 10:28 AM - Re: twisted pair tefzel (Robert L. Nuckolls, III)
11. 10:33 AM - Re: RPM Hall efforct sensor (fedico94@mchsi.com)
Message 1
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| Subject: | twisted pair tefzel |
Hello All-
A while back someone was looking for twisted pair tefzel cable, and I had thought
I had some left over in the shop. As it happens, I seem to have already given
it away... as well as having lost the contact info for the fellow in need.
Sorry about that!
do not archive...
Glen Matejcek
Message 2
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| Subject: | RPM Hall efforct sensor |
my G3X system uses a Hall effect sensor (made by UMA) on the Slick magneto. I
do not get a reading from this on the MFD and checked set up for proper sensor
input.
I note that there is a 10V power supplied to the sensor and it has a ground wire
and I beleive a signal wire. It seems the Hall efect sensor acts as a switch
and is suppposed to open the switch breaking the power with each swipe of a
magnet. I tried testing this with my multimeter (analogue) and only saw a sustained
10V reading.
Going forward with this G3X system I think I will have to test the integrety of
the wiring from time to time. I would think if I put a signal down the sensor
wire of 10V at some frequency reading I would eventually get a response on the
RPM meter on the MFD. Then I would know that that the sensor is defective.
Or, in this particular case is there some way to bench test the Hall effect
switch after removal from the engine ?
What equipment could I purchase to perform some of these minor sensor tests on
glass screen systems with sensor signal tested at the wiring at the sensor or
along a connector like the one I have ? Bob's book has some information on analgoue
guages. What potential for damage exists from these test ?
thanks Robert Federhofer
Message 3
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| Subject: | Re: RPM Hall efforct sensor |
Robert...
I'm not familiar with the UMA hall effect sensor, but any that I
have ever worked with need three wires...one ground, one for
power and one for the signal. Is it possible that the case is a
ground and if you have only two wires then the one you are
measuring is the power and the other the signal?
Harley
-----------------------------------------------------------------
> --> AeroElectric-List message posted by: fedico94@mchsi.com
>
> my G3X system uses a Hall effect sensor (made by UMA) on the Slick magneto.
I do not get a reading from this on the MFD and checked set up for proper sensor
input.
>
> I note that there is a 10V power supplied to the sensor and it has a ground wire
and I beleive a signal wire. It seems the Hall efect sensor acts as a switch
and is suppposed to open the switch breaking the power with each swipe of
a magnet. I tried testing this with my multimeter (analogue) and only saw a sustained
10V reading.
>
> Going forward with this G3X system I think I will have to test the integrety
of the wiring from time to time. I would think if I put a signal down the sensor
wire of 10V at some frequency reading I would eventually get a response on
the RPM meter on the MFD. Then I would know that that the sensor is defective.
Or, in this particular case is there some way to bench test the Hall effect
switch after removal from the engine ?
>
> What equipment could I purchase to perform some of these minor sensor tests on
glass screen systems with sensor signal tested at the wiring at the sensor or
along a connector like the one I have ? Bob's book has some information on
analgoue guages. What potential for damage exists from these test ?
>
> thanks Robert Federhofer
>
Message 4
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| Subject: | Re: OS Wig-Wag Project |
Bob,
Very good, I will test the software with the hardware. I had
also considered using the last two inputs to control the wig-wag
interval. I have it set to 750 millisec at the moment which seems
to be a standard value for aircraft wig-wag (each light flashes
40 times per minute). The last two inputs could be used to allow
the interval to be controlled via jumpers or a switch.
In terms of using this as a replacement for the auto flasher, I
guess the only restriction would be the maximum lamp power
limit which you are planning to define after additional hardware
testing.
Also, there was at least one other person who was interested in
software development who requested a board to use for
testing. See below...
Greg McHugh
-------------------
Bob,
I'd like one of the boards. I'm not sure if I'll be herding bytes, or they will
be herding me, but I'd like to try! Please let me know what I owe you for it.
Greg - as long as I've got your code, I'll try to flash my own chip... but I'll
contact you if I can't get it to work!!
Thank you!!
Paul A. Fisher
8428 114th Avenue West
Taylor Ridge, Illinois 61284
--
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374588#374588
Message 5
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| Subject: | Re: RPM Hall efforct sensor |
Are you using a pull-up resistor? Other EMS systems (Dynon, AFS, MGL)
require one. See this:
http://www.mglavionics.com/Tach_Sender_Instructions.pdf
-Rob
On Sun, Jun 3, 2012 at 8:25 AM, Harley <harley@agelesswings.com> wrote:
> Robert...
>
> I'm not familiar with the UMA hall effect sensor, but any that I have eve
r
> worked with need three wires...one ground, one for power and one for the
> signal. Is it possible that the case is a ground and if you have only tw
o
> wires then the one you are measuring is the power and the other the signa
l?
>
> Harley
> ------------------------------
>
>
> my G3X system uses a Hall effect sensor (made by UMA) on the Slick magnet
o. I do not get a reading from this on the MFD and checked set up for prop
er sensor input.
>
> I note that there is a 10V power supplied to the sensor and it has a grou
nd wire and I beleive a signal wire. It seems the Hall efect sensor acts a
s a switch and is suppposed to open the switch breaking the power with each
swipe of a magnet. I tried testing this with my multimeter (analogue) and
only saw a sustained 10V reading.
>
> Going forward with this G3X system I think I will have to test the integr
ety of the wiring from time to time. I would think if I put a signal down
the sensor wire of 10V at some frequency reading I would eventually get a r
esponse on the RPM meter on the MFD. Then I would know that that the senso
r is defective. Or, in this particular case is there some way to bench tes
t the Hall effect switch after removal from the engine ?
>
> What equipment could I purchase to perform some of these minor sensor tes
ts on glass screen systems with sensor signal tested at the wiring at the s
ensor or along a connector like the one I have ? Bob's book has some infor
mation on analgoue guages. What potential for damage exists from these tes
t ?
>
> thanks Robert Federhofer
>
>
> *
>
===========
===========
===========
===========
> *
>
>
--
Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K
Message 6
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| Subject: | Re: NAV splitter grounded? |
Thanks, guys... I have only one nav radio, and I'm seeing jumpy needles on
both the lateral (VOR and localizers) as well as glideslope. GPS needle
(lateral only) is rock solid. I have this antenna:
http://www.rami.com/product-view.php?pid=8. It's mounted under the
horizontal stabilizer on an RV-10. Going to do more testing today.
-Rob
On Sat, Jun 2, 2012 at 6:50 AM, Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> nuckolls.bob@aeroelectric.com**>
>
>
> At 08:33 PM 6/1/2012, you wrote:
>
>> Quick question: Should the Comant CI-507 Nav/GS splitter (between my
>> antenna and GNS430) be isolated from the airframe ground? Seems like the
>> answer is "yes" but I didn't think about it when wiring my panel, and it's
>> currently not isolated. I'm thinking this could be responsible for my
>> "jumpy" needles.
>>
>
> As Dave pointed out, the metallic enclosure
> of your splitter has continuity to ground
> by way of the coax shields that are tied
> to it through the connectors.
>
> Things that go on 'inside the wall of shields'
> in a feed line system is pretty much an isolated
> world. Just how and where the shields get tie
> to the airframe . . . or whether they ever get
> tied to airframe has no influence upon the
> business of getting radio frequency power from
> one end to the other.
>
> Are you seeing similar symptoms with more than
> one steering needle? Both VOR or is one of them
> a Glide Slope?
>
>
> Bob . . .
>
>
--
Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K
Message 7
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| Subject: | Re: RPM Hall efforct sensor |
Food for thought but I think the AHARS unit must have this inside. The schematic
and instructions do not mention any additional resister to be added. MGL has
a nice idea that looks more functional for placement in a small airplane and
allow for accessability and serviceing. Cnnot understand why Big time companies
like Garmin design boxes that would be better suited for a 777 with lots
or room to work on the unit. I note that the placement of the sensor is closer
to the mounting plate on the 6300 series Slick mag whereas mine appears to be
mounted mid body based upon the vent plug for the mag. The halleffect unit
screws into this plug. Interesting educational videos on YouTube regarding hall
efeect sensors (3 types) and how they react to magnet
----- Original Message -----
From: Rob Kochman <rv10rob@gmail.com>
Sent: Sun, 3 Jun 2012 11:34:08 -0500 (CDT)
Subject: Re: AeroElectric-List: RPM Hall efforct sensor
Are you using a pull-up resistor? Other EMS systems (Dynon, AFS, MGL)
require one. See this:
http://www.mglavionics.com/Tach_Sender_Instructions.pdf
-Rob
On Sun, Jun 3, 2012 at 8:25 AM, Harley <harley@agelesswings.com> wrote:
> Robert...
>
> I'm not familiar with the UMA hall effect sensor, but any that I have ever
> worked with need three wires...one ground, one for power and one for the
> signal. Is it possible that the case is a ground and if you have only two
> wires then the one you are measuring is the power and the other the signal?
>
> Harley
> ------------------------------
>
>
> my G3X system uses a Hall effect sensor (made by UMA) on the Slick magneto.
I do not get a reading from this on the MFD and checked set up for proper sensor
input.
>
> I note that there is a 10V power supplied to the sensor and it has a ground wire
and I beleive a signal wire. It seems the Hall efect sensor acts as a switch
and is suppposed to open the switch breaking the power with each swipe of
a magnet. I tried testing this with my multimeter (analogue) and only saw a sustained
10V reading.
>
> Going forward with this G3X system I think I will have to test the integrety
of the wiring from time to time. I would think if I put a signal down the sensor
wire of 10V at some frequency reading I would eventually get a response on
the RPM meter on the MFD. Then I would know that that the sensor is defective.
Or, in this particular case is there some way to bench test the Hall effect
switch after removal from the engine ?
>
> What equipment could I purchase to perform some of these minor sensor tests on
glass screen systems with sensor signal tested at the wiring at the sensor or
along a connector like the one I have ? Bob's book has some information on
analgoue guages. What potential for damage exists from these test ?
>
> thanks Robert Federhofer
>
>
> *
>
===========
===========
===========
===========
> *
>
>
--
Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K
Message 8
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| Subject: | Re: OS Wig-Wag Project |
At 11:03 AM 6/3/2012, you wrote:
>
>Bob,
>
>Very good, I will test the software with the hardware. I had
>also considered using the last two inputs to control the wig-wag
>interval. I have it set to 750 millisec at the moment which seems
>to be a standard value for aircraft wig-wag (each light flashes
>40 times per minute). The last two inputs could be used to allow
>the interval to be controlled via jumpers or a switch.
Yes. I think I've got the inputs configured wrong.
They'd need +5 pullup resistors and I've condifigured
them with voltage dividers . . . but we can work that
out.
>In terms of using this as a replacement for the auto flasher, I
>guess the only restriction would be the maximum lamp power
>limit which you are planning to define after additional hardware
>testing.
Correct. I'm not sure I'd recommend this set of
hardware for incandescent lamps. The 3-terminal
auto flasher is a really good value and well
suited to the task.
>Also, there was at least one other person who was interested in
>software development who requested a board to use for
>testing. See below...
Yes. I'm packing up for a 3-day stint in Wichita
to finish some bunkbeds for may grandsons. Will
be back on Thursday. I'll get another board stuffed
for Paul.
Bob . . .
Message 9
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| Subject: | Re: NAV splitter grounded? |
I am wondering if the antenna, mounted under the all metal airframe is
possibly seeing multiple images off the metal structures with phasing
caused by the different paths.....
D
-------------------------------------------------------------------------
-------
----- Original Message -----
From: Rob Kochman
To: aeroelectric-list@matronics.com
Sent: Sunday, June 03, 2012 9:40 AM
Subject: Re: AeroElectric-List: NAV splitter grounded?
Thanks, guys... I have only one nav radio, and I'm seeing jumpy
needles on both the lateral (VOR and localizers) as well as glideslope.
GPS needle (lateral only) is rock solid. I have this antenna:
http://www.rami.com/product-view.php?pid=8. It's mounted under the
horizontal stabilizer on an RV-10. Going to do more testing today.
-Rob
On Sat, Jun 2, 2012 at 6:50 AM, Robert L. Nuckolls, III
<nuckolls.bob@aeroelectric.com> wrote:
<nuckolls.bob@aeroelectric.com>
At 08:33 PM 6/1/2012, you wrote:
Quick question: Should the Comant CI-507 Nav/GS splitter (between
my antenna and GNS430) be isolated from the airframe ground? Seems like
the answer is "yes" but I didn't think about it when wiring my panel,
and it's currently not isolated. I'm thinking this could be responsible
for my "jumpy" needles.
As Dave pointed out, the metallic enclosure
of your splitter has continuity to ground
by way of the coax shields that are tied
to it through the connectors.
Things that go on 'inside the wall of shields'
in a feed line system is pretty much an isolated
world. Just how and where the shields get tie
to the airframe . . . or whether they ever get
tied to airframe has no influence upon the
business of getting radio frequency power from
one end to the other.
Are you seeing similar symptoms with more than
one steering needle? Both VOR or is one of them
a Glide Slope?
Bob . . .
=================
_ities such as List Un/Subscription,
www.matronics.com/Navigator?AeroElectric-List"
target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
======================ttp://f
orums.matronics.com/" target="_blank">http://forums.matronics.com
======================
-Matt Dralle, List Admin.
======
--
Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K
Message 10
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| Subject: | Re: twisted pair tefzel |
At 08:40 AM 6/3/2012, you wrote:
><aerobubba@earthlink.net>
>
>Hello All-
>
>A while back someone was looking for twisted pair tefzel cable, and
>I had thought I had some left over in the shop. As it happens, I
>seem to have already given it away... as well as having lost the
>contact info for the fellow in need. Sorry about that!
I've got a few thousand feet of 22 tefzel shielded trio.
Bob . . .
Message 11
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| Subject: | Re: RPM Hall efforct sensor |
That appears to be correct. The red wire (orange on white for this purpose is
input to sensor of 10V. It has a blu/white wire for ground and a white wire for
signal to the unit. I continued the sheild wire through the plug connector
(4 wire--plastic. The plug holding the Hall sensor) screws into the magneto
case. I could check to see if this is grounding at the magneto case. The schematic
shows only the 3 wire cable sheild grounded at the ADAHRS unit only, as
per Bob's teaching in his book
----- Original Message -----
From: Harley <harley@AgelessWings.com>
Sent: Sun, 3 Jun 2012 10:25:20 -0500 (CDT)
Subject: Re: AeroElectric-List: RPM Hall efforct sensor
Robert...
I'm not familiar with the UMA hall effect sensor, but any that I
have ever worked with need three wires...one ground, one for
power and one for the signal. Is it possible that the case is a
ground and if you have only two wires then the one you are
measuring is the power and the other the signal?
Harley
-----------------------------------------------------------------
> --> AeroElectric-List message posted by: fedico94@mchsi.com
>
> my G3X system uses a Hall effect sensor (made by UMA) on the Slick magneto.
I do not get a reading from this on the MFD and checked set up for proper sensor
input.
>
> I note that there is a 10V power supplied to the sensor and it has a ground wire
and I beleive a signal wire. It seems the Hall efect sensor acts as a switch
and is suppposed to open the switch breaking the power with each swipe of
a magnet. I tried testing this with my multimeter (analogue) and only saw a sustained
10V reading.
>
> Going forward with this G3X system I think I will have to test the integrety
of the wiring from time to time. I would think if I put a signal down the sensor
wire of 10V at some frequency reading I would eventually get a response on
the RPM meter on the MFD. Then I would know that that the sensor is defective.
Or, in this particular case is there some way to bench test the Hall effect
switch after removal from the engine ?
>
> What equipment could I purchase to perform some of these minor sensor tests on
glass screen systems with sensor signal tested at the wiring at the sensor or
along a connector like the one I have ? Bob's book has some information on
analgoue guages. What potential for damage exists from these test ?
>
> thanks Robert Federhofer
>
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