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Lower power LEDs is allways an option; but, as Finn said, the whole point was cheap. To that, I might add simple. The driver is just two input and two output wires, versus sourcing and putting together a custom driver unit.
There are other sources. LEDs are becoming ubiquitous for vehicular lights. These were just a cheap, readily available source that are extremely convenient to use.
On Thursday, August 10, 2017 6:26 PM, Charlie England <flyrotary@lancaironline.net> wrote:
Or, use less powerful LEDs, with no
need to block or dim them...
;-)
On 8/10/2017 4:15 PM, Ernest Christley wrote:
Oops! You're
right. No 5W. They were available a few years ago.
I see
where you're going with the brightness. I was looking at the
regs, which don't point out a maximum brightness. I don't
guess regulators would have suspected that this much light
would become so easy to install. Reading the regs, it feels
like they say, "This is what you have to do, because this is
what we're doing." But, now we're to the point where we have
a constant glowing marker light that is as bright as the
flash!!
You
could be an aluminum shield in front of the markers to block
some of the light, or paint the inside of some of the housing?
Well, if
10W LEDs are bright enough as strobes, then I
would assume that you'd want less intensity for
marker lights.
I would think that strobes normally are more then
three times as bright as marker lights.
Where did you see 5W LEDs?
Perhaps 1W LEDs would be sufficient for marker
lights, but only saw surface mount for the 1W red
LED.
Finn
On 8/10/2017 9:48 AM, Ernest Christley wrote:
Finn,
why would you dim marker lights? Is there an
upper limit on how bright the markers can be?
There
ARE limits on what area each can cover. I
handled this by designing the mount to block
light from where it isn't supposed to be.
You
could also use the 5W LEDs for markers.
That's what I have, because the 10W weren't
there when I put the markers together.
But,
I'd really like to know why you want to dim
them. I'm wondering if I'm missing something.
Great,
but the while point is cheap!
Three strobes (wings and tail)
plus position lights and possibly
landing/taxi lights for less than
$100.
If I could just figure out how to
dim these LEDs for position
lights.
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Update
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31516
OP |
|
600 Lumen 10
Watt Super Bright, Green
LED |
$3.95
|
$3.95
|
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Update
|
31515
OP |
|
350 Lumen 10
Watt Super Bright, Red LED
|
$3.95
|
$3.95
|
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Update
|
31539
PS |
|
LED Driver,
30W DC Output, 110-260VAC
Input |
$8.95
|
$35.80
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Update
|
31325
OP |
|
1000 Lumen
10 Watt Super Bright, Cool
White LED Module |
$2.95
|
$23.60
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Update
|
31557
PS |
|
LED Driver,
10W Output, 12-24VAC/DC
Input |
$3.95
|
$3.95 |
Finn
On 8/9/2017 6:21 PM, Rogers, Bob
J. wrote:
From:
Rotary motors in
aircraft [mailto:flyrotary@lancaironline.net]
Sent: Wednesday,
August 09, 2017 3:36 PM
To: Rotary motors
in aircraft
Subject:
[FlyRotary] Re: Cheap
strobe
Not to burst your
bubble Ernest but for those
less likely to put something
like that together ... when
at Oshkosh this year, I went
to Aircraft Spruce booth and
a guy there was selling his
own design of Nav/Srobe
bulbs: a set includes one
Red, Green White. All you do
is remove the existing
Grimes bulbs and replace the
coloured Red/Green lenses
with clear ones and insert
his custom LED bulbs. No
power supply required; no
extra wiring required – use
the existing circuit at much
less current ~1.2A Vs 6-8A
for a standard set. They
aren’t cheap: $318 normal
price but I was very
impressed and bought them at
the show special of $286.
When you first turn them ON
they are normal NAV lights;
turn them OFF for 1-2
seconds then back ON and
they begin to strobe.
Spruce part number is
11-14934 ... http://www.aircraftspruce.com/catalog/elpages/navstrobesextant40.php
Jeff Whaley
Chubby Cubby,
C-FJWW, 13B
Too much typing. Try
the youtube video I
made. Linked below.
Everything is put
together with A3 pulled
rivets.
31325
OP and 31559
PS?
Pictures
please. Having
a hard time
visualizing
three LEDs
creating a 180
degree dome
mounting them
in a triangle.
Is it possible
to dim them to
use for
landing
lights?
Finn
On 8/4/2017
11:04 PM,
Ernest
Christley
wrote:
For
nearly 15
years, this
list has been
invaluable to
me, and it has
been very
seldom that
I've been able
to give
anything
back. But, I
hope this
helps.
mpja.com
has 10W LEDs
for $2.95
each. Each
strobe takes
three of
them. You
also need the
30W power
supply for
each strobe.
Another
$8.95. I've
put a scope on
the input and
output. It
doesn't
generate much
in the way of
noise. Just a
constant
current.
There
is a seller on
Ebay selling
"Grimes
wingtip
light". You
can get two
for $16 or one
for $6.
In
America, any
of the chain
auto parts
stores carries
the EP36
flasher from
Novita. Takes
one for more
strobes than
you'll want to
run.
Battery
-> Strobe
switch ->
EP36 ->
Input to each
of the power
supplies ->
three LEDs in
series ->
back to power
supply ->
back to EP36
-> ground
Once
set up,
connect to a
battery, but
do not look
directly at
this beast.
For
my first pass,
I cut a strip
of aluminum,
1"x3.5".
Folded into a
triangle with
1" sides.
Rivet an LED
to each side.
To
fit it in the
wingtip light,
I'm cutting a
piece of
aluminum sheet
to replace the
bulb and rivet
to the
housing.
Where the
light was, I'm
cutting the
aluminum and
letting it
fold up from
the center to
form three
mounting faces
where I'll
rivet the
LEDs.
This message,
and the documents attached
hereto, is intended only for
the addressee and may
contain privileged or
confidential information.
Any unauthorized disclosure
is strictly prohibited. If
you have received this
message in error, please
notify us immediately so
that we may correct our
internal records. Please
then delete the original
message. Thank you.
--
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