Does anyone have a good source for 2mm diameter LEDs in a through hole, round base, dome top format? There seem to be limitless supplies of 3mm LEDs in this format for pennies each. I've only found a few 2mm LEDs and these have been over $1 each.
Alternatively, what are good LEDs for marker lights?
Thanks!
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I've ordered several times from them. Never any problems. Good prices and wide variety.
The only ones that are a true 2mm all the way back are the Lumex ceramic LED's that most of the manufacturers use for markers.
Here's the red ones for 50 cents each: http://www.surplusgizmos.com/L...LX203CIT_p_2764.html
Digikey has a bunch of them, as you say, they're not cheap: Lumex 2mm Ceramic LED's, Red, Yellow, Green at Digikey.
I found someone selling a bunch of the red ones sometime back for 10 cents each, I bought all they had. 
I have used these, they were the perfect size for Lionel's Trainmaster marker lights.
Yikes! 
Over a dollar apiece???
How about 100 2mm tower LED's for $6.99 shipped, twenty of each color?
eBay: 292533436967, US seller with fast shipping. There's no reason on earth to pay more than a few cents for common LED types.
NBGT posted:Does anyone have a good source for 2mm diameter LEDs in a through hole, round base, dome top format?
I don't think the flat-top (albeit low-cost) LEDs meet the OP's criteria for round-base and dome-top?
To be sure, it is possible to sand/smooth/polish flat-top LEDs into a dome-top but this can challenge one's patience!
That said, if you accept this level of detail modeling as part of the fun/hobby, another option is to use flexible acrylic fiber cable as the lens. You would still need to shape the cable end into a dome and additionally drop some colored transparent paint with the chosen lens color (unless you have white marker lights 
). So called "end-glow" acrylic fiber comes in 1.0mm, 1.5mm, 2.0mm, etc. diameter and can be purchased by-the-foot. One "trick" is you can drive multiple fibers with a single LED which might apply to illuminating 2 marker lenses.
No doubt the ceramic stem LED is the closest-exit.
Lots of options for diesel class lights but for steam class lights like this the 2mm ceramics are the only ones I know of that will fit.
Pete
For diesels I use the post lights, but as Pete says, for many steam applications for both the class and tender marker lights, there is no substitute for the little 2mm ceramic LED. That's why virtually all the manufacturers use them!
I actually use the nano or loco LEDs from Evans design. If you squirt some canopy glue in the housing it will dry into s lens then you can color the lens if you’re doing caboose lights
gunrunnerjohn posted:Digikey has a bunch of them, as you say, they're not cheap: Lumex 2mm Ceramic LED's, Red, Yellow, Green at Digikey.
This link is broken. I can't find these LEDs on digikey.
Seems they're obsolete, don't know what we'll use now!
I’d better snap up the remaining yellows and greens while they’re still around.
Guess we’ll have to make a bunch of tiny white flags instead.
Here’s a cheap source of green lumex 2mm ceramic LEDs - NOS 1999 so buyer beware - AUD $0.20 each plus $20 shipping to US - someone on this forum should buy out their stock...
https://www.ledsales.com.au/in...&products_id=445
I found those, but the $19 shipping kinda' puts me off!
Mouser has greens and yellows but no one seems to have reds, at least in the US. Lumex SSL-LX203CGT and SSL-LX203CYT respectively.
Pete
Here’s a source for red
Mouser appears to have the red ones as well. SSL-LX203CIT Their illustrations are incorrect, but the spec sheet linked is correct for the ceramic LED. Stock: 1,590 Can Ship Immediately
FWIW, Digikey also has red ones in stock: SSL-LX203CIT. 1,254 Can ship immediately
I just stocked up on all the varieties.
On this topic, where can I buy the 2mm LEDs like what MTH uses for markers but in bulk, multiple colors? The dome tops are fine, but the white side walls should have more of light around the sides. Like the lumex's but for deeper channels
Thanks John. I was searching on SSL-LX203CSRT which is what I have in stock. It looks like Digikey has SSL-LX203CIT as well.
Pete
Allan Loczy posted:On this topic, where can I buy the 2mm LEDs like what MTH uses for markers but in bulk, multiple colors? The dome tops are fine, but the white side walls should have more of light around the sides. Like the lumex's but for deeper channels
What specific LED's are you talking about? For markers and class lights on steam, MTH and Lionel have been using the Lumex ceramic LED. If you're talking about post LED's, you can get them almost everywhere. Be specific as to what you're asking for.
NBGT posted:Here’s a source for red
Not very clear, I entered Image Not Found into my browser address bar, but it didn't find it. 
I found the ones Allan is talking about in a early PS1 engine I upgraded. I couldn't find a source for them. They appear to be like common 3mm and 5mm all plastic domed LEDs but are only 2mm in diameter. I have never seen them anywhere else. Maybe MTH tech support could help out here.
Pete
I know the ones you're talking about now, they're used in the older stuff. Williams and Weaver used them in markers and class lights on the brass steam. I have never found those, and I've scoured the earth, they seem to have disappeared totally from the market. 
I found this image on Google, wish I could link that small one to a product.
gunrunnerjohn posted:Allan Loczy posted:On this topic, where can I buy the 2mm LEDs like what MTH uses for markers but in bulk, multiple colors? The dome tops are fine, but the white side walls should have more of light around the sides. Like the lumex's but for deeper channels
What specific LED's are you talking about? For markers and class lights on steam, MTH and Lionel have been using the Lumex ceramic LED. If you're talking about post LED's, you can get them almost everywhere. Be specific as to what you're asking for.
Maybe it is the Lumex Ceramic I am thinking of, but it seems like what MTH supplies are a bit different, the LEDs are foggy (difused) , not clear. The LEDs they use looks simmilar but the light emitting part is taller than just the dome tops.
These are the common ones that are available. The posts come in different lengths, and they're either flat top or domed.
gunrunnerjohn posted:NBGT posted:Here’s a source for red
Not very clear, I entered Image Not Found into my browser address bar, but it didn't find it.
Here’s the link http://www.surplusgizmos.com/L...LX203CIT_p_2764.html
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