Power LEDs

JIm Weir,
I noted your article in the current issue of KP on LEDs.

I have purchased a small quanity of these. hard to find as they were
recalled - lens were coming off in production. 160 lm @ 1000ma
http://lumileds.com/pdfs/DS60.pdf
My plans are to create a Rudder TE light bar and strobe them.
Currently on the shelf with another project ahead of it.
Jim Heffelfinger
Sacramento

Much better, more light for the same current, LedEngin from Mouser. Less
expensive and the packaging is far superior. Coming up September issue, as
I recall.

Jim

--
"It is the mark of an educated mind to be able to entertain a thought
without accepting it."
--Aristotle


wrote in message
...
JIm Weir,
I noted your article in the current issue of KP on LEDs.

I have purchased a small quanity of these. hard to find as they were
recalled - lens were coming off in production. 160 lm @ 1000ma
http://lumileds.com/pdfs/DS60.pdf
My plans are to create a Rudder TE light bar and strobe them.
Currently on the shelf with another project ahead of it.
Jim Heffelfinger
Sacramento

Jim,

I flew a Bonanza G-36 that the new owner had spent bazillions on. A
truly elegant
feature it had was some sort of strip of blue white LEDs under the
edge of the glare shield.

Overall effect was like the old 727s that had some flourescent lamp
under there.

So of course, I was wondering where one could find a few feet of
something similar
without paying what Beech paid for it!!

LEDs are the obvious solution for this one.

BIll Hale


On Jun 2, 9:06*am, "RST Engineering" wrote:
Much better, more light for the same current, LedEngin from Mouser. *Less
expensive and the packaging is far superior. *Coming up September issue, as
I recall.

Jim

--
"It is the mark of an educated mind to be able to entertain a thought
without accepting it."
* * * * --Aristotle

wrote in message

...



JIm Weir,
I noted your article in the current issue of KP on LEDs.

I have purchased a small quanity of these. *hard to find as they were




recalled *- lens were coming off in production. *160 lm @ 1000ma
http://lumileds.com/pdfs/DS60.pdf
My plans are to create a Rudder TE light bar and strobe them.
Currently on the shelf with another project ahead of it.
Jim Heffelfinger
Sacramento- Hide quoted text -

- Show quoted text -

Works and looks excellent.
Cheap.
Easy to get or build.

Pick any two. {;-)

Jim

--
"It is the mark of an educated mind to be able to entertain a thought
without accepting it."
--Aristotle


" wrote in message
...
Jim,

I flew a Bonanza G-36 that the new owner had spent bazillions on. A
truly elegant
feature it had was some sort of strip of blue white LEDs under the
edge of the glare shield.

Overall effect was like the old 727s that had some flourescent lamp
under there.

So of course, I was wondering where one could find a few feet of
something similar
without paying what Beech paid for it!!

LEDs are the obvious solution for this one.

BIll Hale


On Jun 2, 9:06 am, "RST Engineering" wrote:
Much better, more light for the same current, LedEngin from Mouser. Less
expensive and the packaging is far superior. Coming up September issue, as
I recall.

Jim

--
"It is the mark of an educated mind to be able to entertain a thought
without accepting it."
--Aristotle

wrote in message

...



JIm Weir,
I noted your article in the current issue of KP on LEDs.

I have purchased a small quanity of these. hard to find as they were




recalled - lens were coming off in production. 160 lm @ 1000ma
http://lumileds.com/pdfs/DS60.pdf
My plans are to create a Rudder TE light bar and strobe them.
Currently on the shelf with another project ahead of it.
Jim Heffelfinger
Sacramento- Hide quoted text -

- Show quoted text -

"RST Engineering" wrote in message
m...
Much better, more light for the same current, LedEngin from Mouser. Less
expensive and the packaging is far superior. Coming up September issue,
as I recall

Wow, they have some monster LED's!

I didn't see how they deal with getting rid of the heat produced, by say, a
15 watt emitter. It would be a pretty large issue, I'm sure.
--
Jim in NC

It's really pretty easy. One version of the device has the LED bonded to a
PC board and through the PC board to an aluminum puck about a quarter inch
in diameter which (and this is the trick) is electrically INSULATED from the
diode. Since you generally are going to mount this sucker on the last rib,
or another hunk of aluminum out in the wingtip, all you do is bolt the
diode/pc board/puck assembly to the aluminum with a very thin layer of
thermal grease between the puck and the aluminum. I used a representative
scrap of aluminum about 30 square inches and the diode rise over ambient was
about 20°C. The allowable rise is well over 90C, so I think I just about
sunk it well enough. This was for two 5-watt diodes on the same sink.

Jim

--
"It is the mark of an educated mind to be able to entertain a thought
without accepting it."
--Aristotle


"Morgans" wrote in message
...

Wow, they have some monster LED's!

I didn't see how they deal with getting rid of the heat produced, by say,
a 15 watt emitter. It would be a pretty large issue, I'm sure.
--
Jim in NC

"RST Engineering" wrote in message
m...
It's really pretty easy. One version of the device has the LED bonded to
a PC board and through the PC board to an aluminum puck about a quarter
inch in diameter which (and this is the trick) is electrically INSULATED
from the diode. Since you generally are going to mount this sucker on the
last rib, or another hunk of aluminum out in the wingtip, all you do is
bolt the diode/pc board/puck assembly to the aluminum with a very thin
layer of thermal grease between the puck and the aluminum. I used a
representative scrap of aluminum about 30 square inches and the diode rise
over ambient was about 20°C. The allowable rise is well over 90C, so I
think I just about sunk it well enough. This was for two 5-watt diodes on
the same sink.

Cool! Well, cool enough, anyway! g

I figured there must be a requirement to have it bonded to some external
heat sink, or something that will help get rid of the heat. In a wood
airplane, it would require a bit of added metal, I suppose.

Thanks.
--
Jim in NC

" wrote ...
...it had some sort of strip of blue white LEDs under
the edge of the glare shield.

So of course, I was wondering where one could find a few
feet of something similar without paying what Beech paid for it!!

About ten years back I saw a vendor at the shows who sold those strips. Not
cheap! Can't remember the name, but they also made custom cutout panel
covers IIRC.

Also, try a google for "electroluminescent strip", should find something in
the electrical hobbie arena.

Or, look about halfway down this link page for EL Products:

http://www.dansdata.com/glowthings.htm


Tangent:
They (linking further to the chinese vendor), these guys make luminescent
dial faces! How COOL would that make your panel look???

On 2008-06-03, Mike Isaksen wrote:
" wrote ...
...it had some sort of strip of blue white LEDs under
the edge of the glare shield.
About ten years back I saw a vendor at the shows who sold those strips. Not
cheap! Can't remember the name, but they also made custom cutout panel
covers IIRC.

Also, try a google for "electroluminescent strip", should find something in
the electrical hobbie arena.

Different stuff. EL wire/strips aren't LEDs; they use an inverter to produce
a signal of about 100 volts at a couple of kilohertz to drive the EL
portion. I'd be a little nervous about putting that in an aircraft: seems
like a good way to generate lots of RF hash.

EL wire is also a royal pain to work with. I should know: that's the glowing
stuff on the TRON costume.
--
Jay Maynard, K5ZC http://www.conmicro.com
http://jmaynard.livejournal.com http://www.tronguy.net
Fairmont, MN (FRM) (Yes, that's me!)
AMD Zodiac CH601XLi N55ZC (ordered 17 March, delivery 10 June)

"Jay Maynard" wrote ...
I'd be a little nervous about putting that in an aircraft:
seems like a good way to generate lots of RF hash.


Yeah, I was wondering about that when I saw the $7 12vdc inverter.
But the 1 inch by 12 inch strips are cheap enough to try:
http://www.glowhut.com/el-strip--el-panel.html

And here's a homebuilder's site that came up:
http://www.aircraftextras.com/EL-Panel1.htm
from a google "electroluminescent strip airplane".


EL wire is also a royal pain to work with. I should know:
that's the glowing stuff on the TRON costume.
--

I yield to a Master when I see one! ;-)

Hey where are you at in the countdown?