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Re: Wykeham - Somewhere in the south!

Posted: Tue Apr 13, 2021 8:06 pm
by bulleidboy
Rog (RJ) wrote: Tue Apr 13, 2021 7:04 pm What size (ohms) is your resistor? Whatever it is, I would consider doubling or even quadroupling it to reduce the brightness.
Hi Rog - Not sure of the size (ohms) - it's pink! If I were to double-up, would the additional resistor be in-line with the one already in place (on the red wire) - or could I place the additional one on the black wire? Barry

Re: Wykeham - Somewhere in the south!

Posted: Tue Apr 13, 2021 8:29 pm
by Brian
If you have already a series resistor, then add the second one in series. i.e. In the supply line or return wire. (Doesn't matter which).
If you used a self adhesive LED strip of LEDs which are usually in groups of three with a built in resistor per three LEDs, then the additional series resistor added needs to be probably around 10K (10,000 Ohm) .
A bit of trial and error in Ohm size is needed to get the light level down. :o

You can use a 20K liner variable trim Pot with a LED strip and set the illumination level with the adjustment, then remove pot, measure Ohm value and choose a fixed resistor to the nearest value read. Note, on a standard LED it is essential that a 1K resistor is also in circuit when using a adjustable Pot. Failure to do so will result in the LED blowing when the pot is set to minimum, as this is No (zero) resistance!

Re: Wykeham - Somewhere in the south!

Posted: Wed Apr 14, 2021 9:06 am
by bulleidboy
Walkingthedog wrote: Tue Apr 13, 2021 7:09 pm What ever you put inside to stop the light bleed will need to be painted the same colour as the 12 inch to the foot version.
Might have to do some "Googling" for that one Brian :)

Re: Wykeham - Somewhere in the south!

Posted: Wed Apr 14, 2021 8:02 pm
by bulleidboy
Following on from Brian's (WTD) suggestion, I have painted the inside of the carriage - I think it did the trick. I also, as Rog (RJ) suggested, added another resisitor. I think it has worked?

ImageIMG_0935 by Barry Clayton, on Flickr

Re: Wykeham - Somewhere in the south!

Posted: Wed Apr 14, 2021 8:26 pm
by Brian
Looks great. Well done :D

Re: Wykeham - Somewhere in the south!

Posted: Wed Apr 14, 2021 8:33 pm
by Carl L
Perfect I would say.

Re: Wykeham - Somewhere in the south!

Posted: Wed Apr 14, 2021 10:41 pm
by Walkingthedog
It has that perfect light yet gloomy look.

Re: Wykeham - Somewhere in the south!

Posted: Thu Apr 15, 2021 7:37 am
by Puddles
Nailed it again Barry, even though the picture is to show the results of your tinkering to get the lighting right the reflection off the carriage lights on the rails make the scene so lifelike. You certainly have a talent for setting a scene.

Puddles

Re: Wykeham - Somewhere in the south!

Posted: Thu Apr 15, 2021 7:45 am
by Bandit Mick
Very atmospheric. Well done.

Re: Wykeham - Somewhere in the south!

Posted: Thu Apr 15, 2021 8:01 am
by teedoubleudee
Looking good BB