LED's burning?

Basic electrical and electronics, such as DC/Analog control.
Martin71
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Re: LED's burning?

Postby Martin71 » Sun Apr 18, 2010 6:23 pm

Hi

Sounds like you have filament bulbs, LED's do not generate heat,only for a nano second before they burn out. Where did you get said lights and can we see a photo or a link to a photo.

Cheers

m

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ste234
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Re: LED's burning?

Postby ste234 » Sun Apr 18, 2010 7:40 pm

Hi Martin,
The lights were bought from Layouts 4 U, here http://www.layouts4u.net/Images/L327.jpg and my own photo's:
Image

Image

Image

As i said earlier they are painted black so i can't see inside the bulb.

---------------
Flash, just tried what you said, definatley not LED's!

Cheers,
Ste
'Springfield', N gauge Modern Era Layout

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Son-1
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Re: LED's burning?

Postby Son-1 » Sun Apr 18, 2010 9:00 pm

According to the online catalogue L327 is 6v bulb only. So there is no way they can be LED unless you ordered specially.
Stephen T

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ste234
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Re: LED's burning?

Postby ste234 » Sun Apr 18, 2010 9:34 pm

Son-1 wrote:According to the online catalogue L327 is 6v bulb only. So there is no way they can be LED unless you ordered specially.

Yeah i realise now... i just presumed they were LED's, and they looked like them.
Still doesn't explain the burning and smoke though...
'Springfield', N gauge Modern Era Layout

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Son-1
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Re: LED's burning?

Postby Son-1 » Sun Apr 18, 2010 9:48 pm

Tungsten bulbs do get hot. With the supplied resistors, you are probably pushing them to the maximum at 12v, and shortening the life. Try getting an old 6v power supply (or even a 3v) and they won't get so hot and smell.
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ste234
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Re: LED's burning?

Postby ste234 » Mon Apr 19, 2010 8:03 pm

Had a reply from the company when i got home earlier, it basically said it's the heat burning the paint of the bulbs, and after being used for a while the paint, smell and occasional smoke will dissapear :D

Thanks for all the help guys, LED's or not! :wink:
'Springfield', N gauge Modern Era Layout

bigbob
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Re: LED's burning?

Postby bigbob » Mon Apr 19, 2010 8:25 pm

Glad thats sorted, i`ve just had 30 delivered to use as yard lights!!

Bob
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Flashbang
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Re: LED's burning?

Postby Flashbang » Mon Apr 19, 2010 8:46 pm

bigbob wrote:Glad thats sorted, i`ve just had 30 delivered to use as yard lights!!

Bob

Hi Bob
Hope the power supply that's feeding them is on the large side?
While I don't know their exact current draw, but most filament lamp will consume somewhere between 40 and 70 milliamp each. Therefore 30 lamps at 40ma will consume 1.2Amps and at 70ma 30 will demand 2.1 Amps from the PSU.

You really need to know what their individual current rating is, then multiply that by the number of lit lamps on the power supply.
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bigbob
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Re: LED's burning?

Postby bigbob » Mon Apr 19, 2010 9:30 pm

Cheers Flash, got a 6v 4a power supply unit for my lights, should be able to run a few from that!!

Bob
Growing old is compulsary, growing up is optional!


ALL CLASS 50`S SHOULD BE CUT UP INTO SMALL PIECES AND USED FOR SOMETHING MORE USEFUL LIKE A PAPER-WEIGHT

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ste234
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Re: LED's burning?

Postby ste234 » Mon Apr 19, 2010 10:07 pm

Bob, if they do smoke and give off a smell, don't worry, i'm keeping mine on for 5 mins at a time to kind of break them.
They give a nice glow that isn't too bright, but looks great in the dark!
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bigbob
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Re: LED's burning?

Postby bigbob » Mon Apr 19, 2010 10:17 pm

What voltage you giving them Ste?

Bob
Growing old is compulsary, growing up is optional!


ALL CLASS 50`S SHOULD BE CUT UP INTO SMALL PIECES AND USED FOR SOMETHING MORE USEFUL LIKE A PAPER-WEIGHT

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Son-1
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Re: LED's burning?

Postby Son-1 » Mon Apr 19, 2010 10:20 pm

central heating on the layout. 8) That would be up to 25w at 6v
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ste234
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Re: LED's burning?

Postby ste234 » Mon Apr 19, 2010 10:22 pm

12v, the instructions say it is best to use 12v and wire 3 in series, so i have :wink:
Pic for you Bob!

Image

For more see: viewtopic.php?f=22&t=20750&start=0

Ste :)
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bigbob
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Re: LED's burning?

Postby bigbob » Mon Apr 19, 2010 10:28 pm

Lookin good, not too bright. I`ll try them that way and also try them in parallel on 6v see how they do!
Growing old is compulsary, growing up is optional!


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edwardholmes91
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Re: LED's burning?

Postby edwardholmes91 » Mon Apr 19, 2010 10:36 pm

Yup, definitely look like some kind of miniature filament lamp. I have a few on my layout and tend to find they give a much more natural light for things like station lighting. But they do get quite warm and I know I friend of mine has burnt himself once or twice on some that he had for his layout that were filament lamps! :P Nothing major thought fortunately :D


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