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Paul Hamilton aka "Lancashire Fusilier"
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844 Posts
Further to that, I suggest wiring a small circuit up for a few pence that will allow you to adjust the brightness of the LED by adjusting the voltage applied using a variable resistor.

Depending on the voltage rating of your LED which is typically around 1.5 - 3 Volts I would apply a 1000 ohm (1k) resistor in series with a 0-10,000 ohm trim pot which gives you resistoe adjustment from 1000 to 11000 ohms which when I apllied a 6 volt supply to resulted in very prototypical light levels using DCC Concepts 1.8 mm panel dot typw Prototypical White LED.
 

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Paul Hamilton aka "Lancashire Fusilier"
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844 Posts
QUOTE (Mark Chapman @ 29 Aug 2008, 06:19) <{POST_SNAPBACK}>...I used the wire from a motor winding I got from inside an old DVD player or something of that nature. It is coated with some kind of red enamel and is not much thicker that a human hair yet is perfectly insulated even pressing hard down on it across live rails I could not get my dcc layout to short.
On single posts signals I drilled a minute hole almost invisible to send the single wire down inside and for more complicated signals like a gantry the wires look like scale electrical cable anyway.

Sounds good Mark. I was going to do the wire down the inside of the tubular post type signals but was a little more stumped by the cast white metal "timber" post style. It was suggested that a groove could be cut along the post and the wire laid into that however it doesn't look too bad to have the wire simply CA glued down the back once painted and weathered anyway.
 
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