Today's Message Index:
----------------------
1. 05:02 AM - RV-8 wiring diagram (tnikkel)
2. 05:10 AM - Re: Multiplexer or new antenna (Robert L. Nuckolls, III)
3. 06:18 AM - Re: Multiplexer or new antenna (Kelly McMullen)
4. 07:32 AM - Re: RV-8 wiring diagram (user9253)
5. 12:34 PM - MP100701 Open Collector To Ground Position Sensor (William Hunter)
6. 03:07 PM - Re: MP100701 Open Collector To Ground Position Sensor (Robert L. Nuckolls, III)
7. 03:27 PM - Re: MP100701 Open Collector To Ground Position Sensor (Charlie England)
8. 07:15 PM - Re: MP100701 Open Collector To Ground Position Sensor (user9253)
9. 08:02 PM - Re: MP100701 Open Collector To Ground Position Sensor (William Hunter)
Message 1
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| Subject: | RV-8 wiring diagram |
Current starting the wiring on the RV-8 I am building. Attached is the diagram
for the main power and charging system. I would like a second opinion to make
sure I have not made a mistake. Ignore the avionics bus that's planning for the
future if I ever add that. The wiring from the circuit breakers is all sized
properly.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=470036#470036
Attachments:
http://forums.matronics.com//files/n285ts_power_189.bmp
Message 2
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| Subject: | Re: Multiplexer or new antenna |
At 11:25 PM 6/12/2017, you wrote:
>Thanks Kelly.
>Follow up question... I can put a second comm antenna about 3 feet
>from the existing antenna, but that will place it about 1 foot from
>the transponder antenna.
>Would that be OK since the transponder is so much higher freq?
>
>Jeff
If it is a problem, the difficulty will manifest in
misbehaviors by the comm radio. You may hear a burst
of 'buzz' every time the reply light comes on. Baring
that, proximity to the antenna should not be a problem.
Bob . . .
Message 3
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| Subject: | Re: Multiplexer or new antenna |
I would rather see you get the separation by putting a com antenna under
a wing. It may be okay, but what is backup plan if it doesn't work and
you have a hole to patch in the fuselage? It is much easier to make an
inspection plate mounting that can be discarded if you don't like the
results.
On 6/13/2017 5:09 AM, Robert L. Nuckolls, III wrote:
> At 11:25 PM 6/12/2017, you wrote:
>> Thanks Kelly.
>> Follow up question... I can put a second comm antenna about 3 feet
>> from the existing antenna, but that will place it about 1 foot from
>> the transponder antenna.
>> Would that be OK since the transponder is so much higher freq?
>>
>> Jeff
>
> If it is a problem, the difficulty will manifest in
> misbehaviors by the comm radio. You may hear a burst
> of 'buzz' every time the reply light comes on. Baring
> that, proximity to the antenna should not be a problem.
>
>
> Bob . . .
>
Message 4
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| Subject: | Re: RV-8 wiring diagram |
It seems that some of the feeders are larger than necessary and could be smaller
by one or two wire sizes.
Can the main power bus feeder be smaller?
Can the E-Bus feeder be smaller?
The E-Bus bridge diode only needs one wire feeding it, not two.
If the E-Bus switch is inadvertently left on during engine start, the aux battery
will help crank the engine and could trip its circuit breaker. That problem
can be eliminated by connecting the output of the E-Bus relay to one of the
inputs of the bridge diode.
Having an engine start button on the control stick could be dangerous. Is it really
necessary?
An avionics switch is a single point of failure. Evidently it happened in Ron Simonton's RV. Read his post: http://www.vansairforce.com/community/showpost.php?p=1167360&postcount=7
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=470046#470046
Message 5
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| Subject: | MP100701 Open Collector To Ground Position Sensor |
Hi All,
Sorry to keep bugging you all on this topic however this is a bit over
my
head and you are the smartest guys in the (cyber) room and I would
greatly
appreciate your comments/feedback/suggestions (again).
Attached is a PDF data sheet of a sensor I think will work for my
application. Could someone PLEASE look it over and tell me IF this
sensor
will work with my application?
I like this particular sensor because it is the right dimensions (length
and
width) for my application (I have VERY LIMITED space) and this sensor is
an
open collector to ground that I need for the Dynon Skyview EMS=85plus it
is
only 15 bucks!!!
The questions I have are:
-The data sheet states =93Open Collector (NPN) output can be used with
bipolar
or cmos logic circuits with suitable pull up resistor=94. I do not know
what
this means. I want to have one of my Dynon Skyview EMS pins watch for
ground on a wire. If the pin does not see ground then the display
annunciation will be dark however when the pin sees a connection to
ground
then the EFIS display will annunciate an =93ICE=94 warning (it has to
look for
ground because I need to share this EFIS input pin with the Dynon
AOA/Pitot
tube heater system monitor wire. This monitor wire is open when the
pitot
heater system is working correctly however when the pitot heater system
fails, the system connects this monitor wire to ground).
-This sensor has three wires: Brown =93VCC=94, Blue =93ground=94, and
Black
=93output=94. I assume the Brown wire needs to have a 5 to 12 VDC power
source
and the Black wire would go to my EFIS pin?
-I see where the =93pull up resistor=94 is supposed to be installed
however I do
not know what value resistor to use or if it is required.
-If the sensor relies on the magnetic attraction of the target magnet
and
the target magnet moves away because it is mounted on the door however
still
attached to the air box structure is a second magnet that is located
only =BD
inch next to the sensor, will that second magnet effect the operation of
the
switch?
-I want to use the Dynon Skyview PIN 18 as the power source for this
sensor.
PIN 18 is a 5 VDC power source that is output limited to 300 mA. I am
already using that pin to power a McLagan Enterprises CS-6AB current
sensor
so I do not want to overtax the 300 mA output rating of the pin. Does
anyone know what the current draw of the CS-6AB (it cannot be much)
A recap on the project=85I built an air filter box out of fiberglass and
it
has a reed type valve alternate air that is made from fiberglass and is
held
closed by a fiberglass spring and two magnets (one on the door and one
in
the fiberglass air box structure). The design is such that should the
big
air filter become iced up the engine vacuum will pull against the
door=92s
spring and the two magnets and open the door (one magnet will ride away
because it is mounted on the door while the second magnet will stay
attached
to the air box structure). I want to monitor the position of the door
with
the Dynon EFIS pin input.
..
THANKS AGAIN and I am VERY GRATEFUL for the help!!!
Bill Hunter
Message 6
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| Subject: | Re: MP100701 Open Collector To Ground Position Sensor |
Attached is a PDF data sheet of a sensor I think
will work for my application. Could someone
PLEASE look it over and tell me IF this sensor will work with my
application?
I'm sure it will . . .
I like this particular sensor because it is the
right dimensions (length and width) for my
application (I have VERY LIMITED space) and this
sensor is an open collector to ground that I need
for the Dynon Skyview EMS=85plus it is only 15 bucks!!!
. . . ain't 'lectronics wunderful?
The questions I have are:
-The data sheet states =93Open Collector (NPN)
output can be used with bipolar or cmos logic
circuits with suitable pull up resistor=94. I do
not know what this means. I want to have one of
my Dynon Skyview EMS pins watch for ground on a
wire. If the pin does not see ground then the
display annunciation will be dark however when
the pin sees a connection to ground then the EFIS
display will annunciate an =93ICE=94 warning (it has
to look for ground because I need to share this
EFIS input pin with the Dynon AOA/Pitot tube
heater system monitor wire. This monitor wire is
open when the pitot heater system is working
correctly however when the pitot heater system
fails, the system connects this monitor wire to ground).
If the Dynon will sense a dry switch,
then some form of pull-up resistor is
included within the Dynon's signal
conditioning.
This makes your open-collector sensor
ideal to task . . . no additional
electronics required.
-This sensor has three wires: Brown =93VCC=94, Blue
=93ground=94, and Black =93output=94. I assume the Brown
wire needs to have a 5 to 12 VDC power source and
the Black wire would go to my EFIS pin?
That would be my interpretation as well.
-I see where the =93pull up resistor=94 is supposed
to be installed however I do not know what value
resistor to use or if it is required.
Not reqd.
-If the sensor relies on the magnetic attraction
of the target magnet and the target magnet moves
away because it is mounted on the door however
still attached to the air box structure is a
second magnet that is located only =BD inch next to
the sensor, will that second magnet effect the operation of the switch?
Maybe . . . easy to check on the bench.
No way to increase that separation?
-I want to use the Dynon Skyview PIN 18 as the
power source for this sensor. PIN 18 is a 5 VDC
power source that is output limited to 300 mA. I
am already using that pin to power a McLagan
Enterprises CS-6AB current sensor so I do not
want to overtax the 300 mA output rating of the
pin. Does anyone know what the current draw of the CS-6AB (it cannot be
much)
. . . it seems unlikely that a 'sensor'
would need more than a handful of milliamps.
I think the risk is low.
A recap on the project=85I built an air filter box
out of fiberglass and it has a reed type valve
alternate air that is made from fiberglass and is
held closed by a fiberglass spring and two
magnets (one on the door and one in the
fiberglass air box structure). The design is
such that should the big air filter become iced
up the engine vacuum will pull against the door=92s
spring and the two magnets and open the door (one
magnet will ride away because it is mounted on
the door while the second magnet will stay
attached to the air box structure). I want to
monitor the position of the door with the Dynon EFIS pin input.
I think you're on the right track. Some
fiddling with the proposed magnets on the
bench should assuage concerns for untoward
interactions.
Bob . . .
Message 7
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| Subject: | Re: MP100701 Open Collector To Ground Position Sensor |
On Tue, Jun 13, 2017 at 2:33 PM, William Hunter <billhuntersemail@gmail.com
>
wrote:
> Hi All,
>
>
> Sorry to keep bugging you all on this topic however this is a bit over my
> head and you are the smartest guys in the (cyber) room and I would greatl
y
> appreciate your comments/feedback/suggestions (again).
>
>
> Attached is a PDF data sheet of a sensor I think will work for my
> application. Could someone PLEASE look it over and tell me IF this senso
r
> will work with my application?
>
>
> I like this particular sensor because it is the right dimensions (length
> and width) for my application (I have VERY LIMITED space) and this sensor
> is an open collector to ground that I need for the Dynon Skyview EMS
plus
> it is only 15 bucks!!!
>
>
> The questions I have are:
>
>
> -The data sheet states =9COpen Collector (NPN) output can be used w
ith
> bipolar or cmos logic circuits with suitable pull up resistor=9D.
I do not
> know what this means. I want to have one of my Dynon Skyview EMS pins
> watch for ground on a wire. If the pin does not see ground then the
> display annunciation will be dark however when the pin sees a connection
to
> ground then the EFIS display will annunciate an =9CICE=9D war
ning (it has to
> look for ground because I need to share this EFIS input pin with the Dyno
n
> AOA/Pitot tube heater system monitor wire. This monitor wire is open whe
n
> the pitot heater system is working correctly however when the pitot heate
r
> system fails, the system connects this monitor wire to ground).
>
>
> -This sensor has three wires: Brown =9CVCC=9D, Blue =9C
ground=9D, and Black
> =9Coutput=9D. I assume the Brown wire needs to have a 5 to 1
2 VDC power source
> and the Black wire would go to my EFIS pin?
>
>
> -I see where the =9Cpull up resistor=9D is supposed to be ins
talled however I
> do not know what value resistor to use or if it is required.
>
>
> -If the sensor relies on the magnetic attraction of the target magnet and
> the target magnet moves away because it is mounted on the door however
> still attached to the air box structure is a second magnet that is locate
d
> only =C2=BD inch next to the sensor, will that second magnet effect the
> operation of the switch?
>
>
> -I want to use the Dynon Skyview PIN 18 as the power source for this
> sensor. PIN 18 is a 5 VDC power source that is output limited to 300 mA.
> I am already using that pin to power a McLagan Enterprises CS-6AB current
> sensor so I do not want to overtax the 300 mA output rating of the pin.
> Does anyone know what the current draw of the CS-6AB (it cannot be much)
>
>
> A recap on the projectI built an air filter box out of fiberglas
s and it
> has a reed type valve alternate air that is made from fiberglass and is
> held closed by a fiberglass spring and two magnets (one on the door and o
ne
> in the fiberglass air box structure). The design is such that should the
> big air filter become iced up the engine vacuum will pull against the
> door=99s spring and the two magnets and open the door (one magnet w
ill ride
> away because it is mounted on the door while the second magnet will stay
> attached to the air box structure). I want to monitor the position of th
e
> door with the Dynon EFIS pin input.
>
> ..
>
>
> THANKS AGAIN and I am VERY GRATEFUL for the help!!!
>
>
> Bill Hunter
>
>
Bill,
The pullup resistor is shown on that data sheet, in the schematic, which
also shows all the wire connections to make it work. It should do what you
want, but it's not that much smaller than many of the devices I sent
earlier. It would save you (and us) a lot of time if you spell out all of
your requirements, including size (dimensions) in your initial question.
If you really need small, try this:
http://www.mouser.com/ProductDetail/MEDER-electronic-Standex/KSK-1C90U-1015
/?qs=sGAEpiMZZMvFdY0L2HfHxsLmHWXxOk2BtXfBXWgtRX0%3d
or use the google to search for 'form C reed switch'. No electronics, just
a single pole, double throw magnetically activated switch (electrically, it
looks just like a SPDT toggle switch). The one I linked is 'bare' and could
be easily fit into a 3/8" diameter by 1" long space.
Couple more thoughts. Do you really need two magnets? Have you checked
whether the engine can actually overcome the magnets, if the inlet is
blocked? (Many newer magnets are quite powerful.) If you use a long narrow
magnet & just a piece of steel on the stationary side, you could probably
use the same magnet to hold the door shut and activate the reed switch
(mounted away from the steel, toward the other pole of the magnet).
Charlie
Message 8
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| Subject: | Re: MP100701 Open Collector To Ground Position Sensor |
The SkyView EMS has at least 9 general purpose inputs. If all of them are not
already being used, then I suggest that the magnetic sensor be connected to its
own discrete EMS input instead of sharing an input with the pitot heat sensor.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=470075#470075
Message 9
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| Subject: | Re: MP100701 Open Collector To Ground Position Sensor |
Thanks Bob and Charlie!!!
> Do you really need two magnets? Have you checked whether the engine can
actually overcome the magnets, if the inlet is blocked? (Many newer magnets
are quite powerful.) If you use a long narrow magnet & just a piece of
steel on the stationary side, you could probably use the same magnet to
hold the door shut and activate the reed switch (mounted away from the
steel, toward the other pole of the magnet).
This design is not exactly in BETA test at this point... perhaps more like
Charlie minus testing and the plan has changed a bit (I'm sure that I am
the only one in Aviation that has had design creep and concept validation
issues).
I really do not know how strong the magnets need to be... I know...the size
of the flapper door... the size of the main filter... the engine is 540
CID...I know that I want the door to stay closed until the air filter gets
blocked just a smidgen and then I want the flapper to pop fully open... the
indicator light will help decide how large the magnets need to be.
So... I just replaced my worn out electric sonic toothbrush and whilst
conducting the R&R procedure the two brush heads whacked together on the
counter top and got stuck together on the magnet ends and just like magic I
had a "hey what if..." moment.
These magnets are like really... REALLY small and if I place them on one
corner of the door (one magnet on the door and one on the air box
structure) then there will be about 2.5 inches of distance to the adjacent
corner where the magic switch can be installed... then perhaps there will
be enough distance to reduce any magnetic interference. I will buy this
sensor and conduct some fiddling around and report back.
Also... the original plan was to have the Dynon heater sensor on one EMS
sensor pin and the flapper door gizmo on a different pin until I ran out of
pins. Then you all suggested this fancy proximity sensor and I figured that
I could combine both ice related contraptions on a single pin and since the
Dynon sensor is a sink to ground I need a switch gizmo that will also sink
to ground...
Anyhoo.. THANKS AGAIN. It will be a couple of weeks before I can report
back.
Bill
On Jun 13, 2017 6:31 PM, "Charlie England" <ceengland7@gmail.com> wrote:
>
>
> On Tue, Jun 13, 2017 at 2:33 PM, William Hunter <
> billhuntersemail@gmail.com> wrote:
>
>> Hi All,
>>
>>
>>
>> Sorry to keep bugging you all on this topic however this is a bit over m
y
>> head and you are the smartest guys in the (cyber) room and I would great
ly
>> appreciate your comments/feedback/suggestions (again).
>>
>>
>>
>> Attached is a PDF data sheet of a sensor I think will work for my
>> application. Could someone PLEASE look it over and tell me IF this sens
or
>> will work with my application?
>>
>>
>>
>> I like this particular sensor because it is the right dimensions (length
>> and width) for my application (I have VERY LIMITED space) and this senso
r
>> is an open collector to ground that I need for the Dynon Skyview EMS
plus
>> it is only 15 bucks!!!
>>
>>
>>
>>
>>
>> The questions I have are:
>>
>>
>>
>> -The data sheet states =9COpen Collector (NPN) output can be used
with
>> bipolar or cmos logic circuits with suitable pull up resistor=9D.
I do not
>> know what this means. I want to have one of my Dynon Skyview EMS pins
>> watch for ground on a wire. If the pin does not see ground then the
>> display annunciation will be dark however when the pin sees a connection
to
>> ground then the EFIS display will annunciate an =9CICE=9D wa
rning (it has to
>> look for ground because I need to share this EFIS input pin with the Dyn
on
>> AOA/Pitot tube heater system monitor wire. This monitor wire is open wh
en
>> the pitot heater system is working correctly however when the pitot heat
er
>> system fails, the system connects this monitor wire to ground).
>>
>>
>>
>> -This sensor has three wires: Brown =9CVCC=9D, Blue
=9Cground=9D, and Black
>> =9Coutput=9D. I assume the Brown wire needs to have a 5 to
12 VDC power source
>> and the Black wire would go to my EFIS pin?
>>
>>
>>
>> -I see where the =9Cpull up resistor=9D is supposed to be in
stalled however I
>> do not know what value resistor to use or if it is required.
>>
>>
>>
>> -If the sensor relies on the magnetic attraction of the target magnet an
d
>> the target magnet moves away because it is mounted on the door however
>> still attached to the air box structure is a second magnet that is locat
ed
>> only =C2=BD inch next to the sensor, will that second magnet effect the
>> operation of the switch?
>>
>>
>>
>> -I want to use the Dynon Skyview PIN 18 as the power source for this
>> sensor. PIN 18 is a 5 VDC power source that is output limited to 300 mA
.
>> I am already using that pin to power a McLagan Enterprises CS-6AB curren
t
>> sensor so I do not want to overtax the 300 mA output rating of the pin.
>> Does anyone know what the current draw of the CS-6AB (it cannot be much)
>>
>>
>>
>> A recap on the projectI built an air filter box out of fibergla
ss and it
>> has a reed type valve alternate air that is made from fiberglass and is
>> held closed by a fiberglass spring and two magnets (one on the door and
one
>> in the fiberglass air box structure). The design is such that should th
e
>> big air filter become iced up the engine vacuum will pull against the
>> door=99s spring and the two magnets and open the door (one magnet
will ride
>> away because it is mounted on the door while the second magnet will stay
>> attached to the air box structure). I want to monitor the position of t
he
>> door with the Dynon EFIS pin input.
>>
>> ..
>>
>>
>>
>> THANKS AGAIN and I am VERY GRATEFUL for the help!!!
>>
>>
>>
>> Bill Hunter
>>
>>
>>
>>
>>
>>
>>
>>
>>
> Bill,
>
> The pullup resistor is shown on that data sheet, in the schematic, which
> also shows all the wire connections to make it work. It should do what yo
u
> want, but it's not that much smaller than many of the devices I sent
> earlier. It would save you (and us) a lot of time if you spell out all of
> your requirements, including size (dimensions) in your initial question.
>
> If you really need small, try this:
> http://www.mouser.com/ProductDetail/MEDER-electronic-Standex/KSK-1C90U-
> 1015/?qs=sGAEpiMZZMvFdY0L2HfHxsLmHWXxOk2BtXfBXWgtRX0%3d
>
> or use the google to search for 'form C reed switch'. No electronics, jus
t
> a single pole, double throw magnetically activated switch (electrically,
it
> looks just like a SPDT toggle switch). The one I linked is 'bare' and cou
ld
> be easily fit into a 3/8" diameter by 1" long space.
>
> Couple more thoughts. Do you really need two magnets? Have you checked
> whether the engine can actually overcome the magnets, if the inlet is
> blocked? (Many newer magnets are quite powerful.) If you use a long narro
w
> magnet & just a piece of steel on the stationary side, you could probably
> use the same magnet to hold the door shut and activate the reed switch
> (mounted away from the steel, toward the other pole of the magnet).
>
> Charlie
>
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