Today's Message Index:
----------------------
1. 07:18 AM - Re: LED Ghosting (Thermos)
2. 08:02 AM - Re: Re: LED Ghosting (Robert L. Nuckolls, III)
3. 09:14 AM - Re: Re: LED Ghosting (Robert L. Nuckolls, III)
4. 09:20 AM - Re: Hourmeter / oil pressure switch (micreb)
5. 09:30 AM - Re: Re: LED Ghosting (Robert L. Nuckolls, III)
6. 09:31 AM - 4 light wig-wag (micreb)
7. 11:03 AM - Re: 4 light wig-wag (Robert L. Nuckolls, III)
8. 11:20 AM - Re: 4 light wig-wag (Robert L. Nuckolls, III)
9. 11:22 AM - Re: 4 light wig-wag (Robert L. Nuckolls, III)
10. 12:46 PM - Re: 4 light wig-wag (Robert L. Nuckolls, III)
11. 02:28 PM - Re: 4 light wig-wag (Buckaroo Banzai)
12. 06:22 PM - Re: 4 light wig-wag (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: LED Ghosting |
Bob,
Reawakening this thread, you mentioned a few years ago a potential mod to the LR3C
to eliminate "ghosting" when using LEDs as annunciatirs-
"The 'problem' can be eliminated by snipping out the one-time-useful resistor.
I think I'll suggest that B&C eliminate that resistor in future production and
modify any regulators that come back for other reasons."
Am I understanding this correctly as a solution, and if so, was this mod ever made
by B&C? I purchased an LR3C this year and if it's the same as before, I may
wait 'till it's out of warranty then do the mod myself.
Thanks,
Dave
--------
Dave
RV-7 fuselage
Boston, MA
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=461883#461883
Message 2
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| Subject: | Re: LED Ghosting |
At 09:16 AM 11/2/2016, you wrote:
>
>Bob,
>
>Reawakening this thread, you mentioned a few years ago a potential
>mod to the LR3C to eliminate "ghosting" when using LEDs as annunciatirs-
>
>"The 'problem' can be eliminated by snipping out the
>one-time-useful resistor. I think I'll suggest that B&C eliminate
>that resistor in future production and modify any regulators that
>come back for other reasons."
>
>Am I understanding this correctly as a solution, and if so, was this
>mod ever made by B&C? I purchased an LR3C this year and if it's the
>same as before, I may wait 'till it's out of warranty then do the mod myself.
The LV warning output from the LR3 is designed
to drive INCANDESCENT lamps while offering a
warning for loss of operating power to the
LV warning system. This philosophy has served
TC and OBAM aviation well for several decades.
LEDS are the new kids on the block . . . and like
lithium batteries, dynamic microphones, LED
nav lights, etc . . . they are not form/fit/function
drop-on replacements for their legacy ancestors.
It's easy to make an LED emulate the
incandescent lamp for purposes of using it to
annunciate low volts on an LR3 installation.
http://tinyurl.com/cgnwr5k
But if you'd rather mod the regulator instead,
that's certainly doable . . .
Bob . . .
Message 3
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| Subject: | Re: LED Ghosting |
DON'T KNOW WHAT HAPPENED . . . THE ORIGINAL
REPLY GOT TRUNCATED. LET'S TRY AGAIN.
At 09:16 AM 11/2/2016, you wrote:
>
>Bob,
>
>Reawakening this thread, you mentioned a few years ago a potential
>mod to the LR3C to eliminate "ghosting" when using LEDs as annunciatirs-
>
>"The 'problem' can be eliminated by snipping out the
>one-time-useful resistor. I think I'll suggest that B&C eliminate
>that resistor in future production and modify any regulators that
>come back for other reasons."
>
>Am I understanding this correctly as a solution, and if so, was this
>mod ever made by B&C? I purchased an LR3C this year and if it's the
>same as before, I may wait 'till it's out of warranty then do the mod myself.
The LV warning output from the LR3 is designed
to drive INCANDESCENT lamps while offering a
warning for loss of operating power to the
LV warning system. This philosophy has served
TC and OBAM aviation well for several decades.
LEDS are the new kids on the block . . . and like
lithium batteries, dynamic microphones, LED
nav lights, etc . . . they are not form/fit/function
drop-on replacements for their legacy ancestors.
It's easy to make an LED emulate the
incandescent lamp for purposes of using it to
annunciate low volts on an LR3 installation.
http://tinyurl.com/cgnwr5k
But if you'd rather mod the regulator instead,
that's certainly doable . . .
Bob . . .
Message 4
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| Subject: | Re: Hourmeter / oil pressure switch |
Wow, this got frustrating...
But finally success.
Anyone else up against this just go to NAPA and get an Echlin Oil Pressure Switch
PN OP6627.
It's a higher pressure rating than some of the other generics, and labels exactly
as Bobs 'Hourmeter/Oil P Warn' diagram.... Right down to the P,S,& I labeled
fast on studs..... It's 1/4 NPT threads.
Paul
--------
I'd rather be flying than building but there's an end to the means here (I hope).
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=461887#461887
Message 5
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| Subject: | Re: LED Ghosting |
Subject: Re: AeroElectric-List: Re: LED Ghosting
MAYBE THE THIRD TIME IS THE 'CHARM' . . . I
RAN A CUT-N-PASTE THROUGH A VISIBLE TEXT ONLY
FILTER JUST IN CASE SOME HIDDEN CHARACTER
WAS CAUSING THE MESSAGE TO END EARLY . . .
At 09:16 AM 11/2/2016, you wrote:
Bob,
Reawakening this thread, you mentioned a few years ago a potential
mod to the LR3C to eliminate "ghosting" when using LEDs as annunciatirs-
"The 'problem' can be eliminated by snipping out the one-time-useful
resistor. I think I'll suggest that B&C eliminate that resistor in
future production and modify any regulators that come back for other reasons."
Am I understanding this correctly as a solution, and if so, was this
mod ever made by B&C? I purchased an LR3C this year and if it's the
same as before, I may wait 'till it's out of warranty then do the mod myself.
The LV warning output from the LR3 is designed
to drive INCANDESCENT lamps while offering a
warning for loss of operating power to the
LV warning system. This philosophy has served
TC and OBAM aviation well for several decades.
LEDS are the new kids on the block . . . and like
lithium batteries, dynamic microphones, LED
nav lights, etc . . . they are not form/fit/function
drop-in replacements for their legacy ancestors.
It's easy to make an LED emulate the
incandescent lamp for purposes of using it to
annunciate low volts on an LR3 installation.
See: http://tinyurl.com/cgnwr5k
But as you've noted modifying the regulator instead,
is certainly doable . . .
Bob . . .
Message 6
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I replaced the wing tips on my Murphy Rebel and now have a landing and taxi light
on each wing... Who needs runway lights, eh?
Anyone have any ideas on wigwag for all 4 lights that would enhance the already
attention getting 2 light system?
All 4 are halogen. Not really interested in LEDs yet till the prices come down....
Paul
--------
I'd rather be flying than building but there's an end to the means here (I hope).
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=461888#461888
Message 7
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| Subject: | Re: 4 light wig-wag |
At 11:30 AM 11/2/2016, you wrote:
>
>I replaced the wing tips on my Murphy Rebel and now have a landing
>and taxi light on each wing... Who needs runway lights, eh?
>Anyone have any ideas on wigwag for all 4 lights that would enhance
>the already attention getting 2 light system?
>All 4 are halogen. Not really interested in LEDs yet till the
>prices come down....
probably no big advantage in 'doubling' the
light output.
The effectiveness of a wig-wag system has more
to do with SPACING between the lamps than with
intensity. The eye is a very logarithmic sensor
device that delivers little new information
to the brain due to 2x increase in intensity.
On the other hand, visual acuity determines the
angular displacement that must be exceeded before
a pair of flashing lights is perceived as more
than a single light source.
Worked this issue MANY times in preparing accident
analysis data for litigation of railroad grade
crossing accidents. Lawyers were fond of latching
onto visual differences between newest 12"
roundels versus legacy 8" lenses.
Perceived intensity of the lights is driven
mostly by behaviors of the lens for shaping
the beam than by the size of the lamp or
its associated lens.
The attention getting quality of a grade crossing
signal (originally a single lamp on the end
of a swinging arm . . . a wig wag) is the
distance between the lamps.
https://upload.wikimedia.org/wikipedia/commons/thumb/a/ae/Round
Those interested in exploring this topic from
the railroad perspective may download the
grade crossing 'bible' at http://tinyurl.com/j3nveyx
For our purposes, effectiveness of the wig-wag
system is improved by mounting the lamps as far
apart as practical on the wings. A larger 'stroke'
distance translates into a greater range of
perceptions.
Our development wig-wag adds another feature
that goes to range of perception. At great
distance, the two lights visually merge and
are no particularly attention getting. However,
if you 'triple flash' each lamp during its
respective on-cycle, then you exploit perception
of flashing which occurs at greater range
and perception of motion.
http://tinyurl.com/bos5p5r
As you approach the observer, perception
of motion adds to perception of flashing.
The short answer is, doubling up on the lamps
is of little value. But mounting them further
apart and/or flashing is a good thing
to do.
Bob . . .
Message 8
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| Subject: | Re: 4 light wig-wag |
At 11:30 AM 11/2/2016, you wrote:
>
>I replaced the wing tips on my Murphy Rebel and now have a landing
>and taxi light on each wing... Who needs runway lights, eh?
>Anyone have any ideas on wigwag for all 4 lights that would enhance
>the already attention getting 2 light system?
>All 4 are halogen. Not really interested in LEDs yet till the
>prices come down....
probably no big advantage in 'doubling' the
light output.
The effectiveness of a wig-wag system has more
to do with SPACING between the lamps than with
intensity. The eye is a very logarithmic sensor
device that delivers little new information
to the brain due to 2x increase in intensity.
On the other hand, visual acuity determines the
angular displacement that must be exceeded before
a pair of flashing lights is perceived as more
than a single light source.
Worked this issue MANY times in preparing accident
analysis data for litigation of railroad grade
crossing accidents. Lawyers were fond of latching
onto visual differences between newest 12"
roundels versus legacy 8" lenses.
Perceived intensity of the lights is driven
mostly by behaviors of the lens for shaping
the beam than by the size of the lamp or
its associated lens.
The attention getting quality of a grade crossing
signal (originally a single lamp on the end
of a swinging arm . . . a wig wag) is the
distance between the lamps.
https://upload.wikimedia.org/wikipedia/commons/thumb/a/ae/Round
Those interested in exploring this topic from
the railroad perspective may download the
grade crossing 'bible' at http://tinyurl.com/j3nveyx
For our purposes, effectiveness of the wig-wag
system is improved by mounting the lamps as far
apart as practical on the wings. A larger 'stroke'
distance translates into a greater range of
perceptions.
Our development wig-wag adds another feature
that goes to range of perception. At great
distance, the two lights visually merge and
are not particularly attention getting. However,
if you 'triple flash' each lamp during its
respective on-cycle, then you exploit perception
of flashing which occurs at greater range
and perception of motion.
http://tinyurl.com/bos5p5r
As you approach the observer, perception
of motion adds to perception of flashing.
The short answer is, doubling up on the lamps
is of little value. But mounting them further
apart and/or flashing is a good thing
to do.
Bob . . .
Message 9
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| Subject: | Re: 4 light wig-wag |
probably no big advantage in 'doubling' the
light output.
The effectiveness of a wig-wag system has more
to do with SPACING between the lamps than with
intensity. The eye is a very logarithmic sensor
device that delivers little new information
to the brain due to 2x increase in intensity.
On the other hand, visual acuity determines the
angular displacement that must be exceeded before
a pair of flashing lights is perceived as more
than a single light source.
Worked this issue MANY times in preparing accident
analysis data for litigation of railroad grade
crossing accidents. Lawyers were fond of latching
onto visual differences between newest 12"
roundels versus legacy 8" lenses.
Perceived intensity of the lights is driven
mostly by behaviors of the lens for shaping
the beam than by the size of the lamp or
its associated lens.
The attention getting quality of a grade crossing
signal (originally a single lamp on the end
of a swinging arm . . . a wig wag) is the
distance between the lamps.
https://upload.wikimedia.org/wikipedia/commons/thumb/a/ae/Round
Those interested in exploring this topic from
the railroad perspective may download the
grade crossing 'bible' at http://tinyurl.com/j3nveyx
For our purposes, effectiveness of the wig-wag
system is improved by mounting the lamps as far
apart as practical on the wings. A larger 'stroke'
distance translates into a greater range of
perceptions.
Our development wig-wag adds another feature
that goes to range of perception. At great
distance, the two lights visually merge and
are not particularly attention getting. However,
if you 'triple flash' each lamp during its
respective on-cycle, then you exploit perception
of flashing which occurs at greater range
and perception of motion.
http://tinyurl.com/bos5p5r
As you approach the observer, perception
of motion adds to perception of flashing.
The short answer is, doubling up on the lamps
is of little value. But mounting them further
apart and/or flashing is a good thing
to do.
Bob . . .
Message 10
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| Subject: | Re: 4 light wig-wag |
For some reason, my replies to the List have been
getting truncated. I can seed the same email to
my personal account with no adverse effects
but files to the List get clipped.
The last paragraphs of my abbreviated posting
are as follows:
Those interested in exploring this topic from
the railroad perspective may download the
grade crossing 'bible' at http://tinyurl.com/j3nveyx
For our purposes, effectiveness of the wig-wag
system is improved by mounting the lamps as far
apart as practical on the wings. A larger 'stroke'
distance translates into a greater range of
perceptions.
Our development wig-wag adds another feature
that goes to range of perception. At great
distance, the two lights visually merge and
are not particularly attention getting. However,
if you 'triple flash' each lamp during its
respective on-cycle, then you exploit perception
of flashing which occurs at greater range
and perception of motion.
http://tinyurl.com/bos5p5r
As you approach the observer, perception
of motion adds to perception of flashing.
The short answer is, doubling up on the lamps
is of little value. But mounting them further
apart and/or flashing is a good thing
to do.
Bob . . .
Message 11
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| Subject: | Re: 4 light wig-wag |
I saw 4 responses and they all ended the same way. It looked like a complete response
to me.
--------------------------------------------
On Wed, 11/2/16, Robert L. Nuckolls, III <nuckolls.bob@aeroelectric.com> wrote:
Subject: Re: AeroElectric-List: 4 light wig-wag
To: aeroelectric-list@matronics.com
Date: Wednesday, November 2, 2016, 12:44 PM
For some reason, my replies to the List have been
getting truncated. I can seed the same email to
my personal account with no adverse effects
but files to the List get clipped.
The last paragraphs of my abbreviated posting
are as follows:
Those interested in exploring
this topic
from
the railroad perspective may download the
grade crossing 'bible' at
http://tinyurl.com/j3nveyx
For our purposes, effectiveness of the wig-wag
system is improved by mounting the lamps as far
apart as practical on the wings. A larger
'stroke'
distance translates into a greater range of
perceptions.
Our development wig-wag adds another feature
that goes to range of perception. At great
distance, the two lights visually merge and
are not particularly attention getting. However,
if you 'triple flash' each lamp during its
respective on-cycle, then you exploit perception
of flashing which occurs at greater range
and perception of motion.
http://tinyurl.com/bos5p5r
As you approach the observer, perception
of motion adds to perception of flashing.
The short answer is, doubling up on the lamps
is of little value. But mounting them further
apart and/or flashing is a good thing
to do.
Bob . . .
Message 12
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| Subject: | Re: 4 light wig-wag |
At 04:24 PM 11/2/2016, you wrote:
><ornerycuss2001@yahoo.com>
>
>I saw 4 responses and they all ended the same way. It looked like a
>complete response to me.
Oh good . . . thank you. I checked the forum
through the browser and confirmed your
observation. Pleased to know it's MY
problem and not somebody else's!
Bob . . .
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