Another bit of frippery from the next book. Usual forum rules - don't repost it elsewhere.


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Do these LED's come ready wired with + & - marked Ian ?  They seem pretty tiny to me ………….:roll:

They are exceedingly tiddly Peter. They come with some form of marking on the back which indicates which end is which. Those huge wires in the picture are standard DCC decoder wires.

[user=6]Petermac[/user] wrote:

Do these LED's come ready wired with + & - marked Ian ?  They seem pretty tiny to me ………….:roll:

Of course, the LEDs do not have to be very small ones in every application to transmit the light. Any source of illumination will transmit the light along the fibre optic cable, which is brilliant, because you can use whatever light source is best suited to your application.

Wow, to busy for me but… I'll remember it for later when I get my new eye glasses.:roll:

Where did you get your mini SMD units from Ian?

Brian

[user=52]henryparrot[/user] wrote:

Where did you get your mini SMD units from Ian?

Brian

………. and what power source are you using Ian, are these watch battery jobs?

[user=52]henryparrot[/user] wrote:

Where did you get your mini SMD units from Ian?

Brian

Rapid Electronics

A whole variety in colours and white of various sizes http://www.rapidonline…ronics/Surface-Mount-Leds

Buy more than you need as they are very easy to misplace! ;-)


Rapid are also good for wire, switches, conventional LEDs, resistors, diodes, etc..


Lawrence - just use them like standard LEDs, run from a decoder with a 1K - 2k resistor in series.

I realised the wires in the photo were not part of the LED Ian, I just wondered what actually arrived with the LED.  I know our friends in the east are good at minaturising things, but to supply those with any kind of wire attached seems to be pushing the boundaries a bit too far.

Surface mount LED's are available with tails (wires) attached.
 
One source is DCC concepts in Western Australia.
They also have oo/ho scale working end of train lanterns with wires attached. EG those that were hung on the rear of brake vans etc

 DCCconcepts Home Page

 Ian

Those are tiny Ian. Have you tried them ?

I've got some of the DCC Concepts 4mm scale lamps - they are incredible.


From left to right:
Standard 3mm LED
Side-view LED (for modern BR tail lamps)
Axial LED for older style lamps - as on the OO coach behind
SMD LED
DCC Concepts 4mm scale lamp

[user=339]Ian Morton[/user] wrote:

[user=52][/user]
Lawrence - just use them like standard LEDs, run from a decoder with a 1K - 2k resistor in series.

………. and for the dc Luddites amongst us?

;-):lol:

[user=33]Lawrence[/user] wrote:

[user=339]Ian Morton[/user] wrote:

[user=52][/user]
Lawrence - just use them like standard LEDs, run from a decoder with a 1K - 2k resistor in series.

………. and for the dc Luddites amongst us?

;-):lol:

^The same just get a pickup off the track via your coach/wagon wheels, the resistor and off you pop. Obviously it will only light as long as the track has voltage or feed it off a switchable battery?

[user=33]Lawrence[/user] wrote:

[user=339]Ian Morton[/user] wrote:

[user=52][/user]
Lawrence - just use them like standard LEDs, run from a decoder with a 1K - 2k resistor in series.

………. and for the dc Luddites amongst us?

;-):lol:

You'll need a VERY small match for the scale oil lamp.

If you're using fibre optics to move the light from its source to where it needs to show, what is the benefit of using such small LEDs ?

They're small and can be squeezed into less space than a 'normal' LED - especially with its leads partially intact.

[user=6]Petermac[/user] wrote:

Those are tiny Ian. Have you tried them ?

 Yes, no problems.
 Just connect them up using appropriate resistor to give brightness of choice.

 DCC Concepts also have modern road vehicles with working head/tail lights.

Hi all

It's a good time to raid the shops for sell- off Xmas decorations as a source of fibber optics.

Hth

Jim

[user=350]jim s-w[/user] wrote:

…….. as a source of fibber optics.

Jim

Are these the ones that don't quite come out with a true light??