Fibre Optics in a model

AlanG

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If i were to try and incorporate some fibre optic lights into a 1/72 model kit (probably four lights at most). What equipment would i need to get to install the fibre and run it. And how easy is the fibre optic to work with?
 

Si Benson

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Never done it myself but seen it done on YouTube. A guy did it with a watch battery, an LED and some fibre optic strands.
Maybe YouTube has the answers?
 

AlanG

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For some reason this has gone into the wrong forum area. Should have been in General Modelling Chat. Hmm. Mods could you move please?
 

boatman

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HI AL F/O is very easy to work with I have fitted it in planes for nav lights all you need is to make a small hole at the wing tips an elsewhere if usin 1mm f/o an glue it in place but no ninety degree turns with it only gentle curves back to a white bulb an then usein tamayia colour clear paints the end nr the bulb the coulour you want to show
chris
 

AlanG

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Cheers guys. This needs a bit more investigation. It could make my build 'pop' a little more
 

boatman

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WELL AL IF YOU don't want them this bright all you need to do is fit a heavy resistor
chris
 

Jakko

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I’ve done this before, but it’s a bit awkward to post about it now. Will do so tomorrow morning.
 

AlanG

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Not sure how bright i want it yet. Think a variable resistor would be the way to go
 

AlanG

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Not sure Chris. I'd have to take some measurements to see what would be feasible.
 

boatman

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WELL Al do you know if you want to work the lights from a batt or mains electric as mine is mains for my planes but F/O is cheaper
chris
 

AlanG

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It would have to be a battery operated system. It would only be turned on once in a blue moon lol
 

AlanG

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Just looked at the LED bulbs John has in the Scale Model Shop shop. I presume the wheat bulbs are bigger than the rice bulbs?
 

Jakko

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It’s now tomorrow morning, and I’ve found the thing I wanted to post:


That’s a thread I posted in 2008 on a Warhammer 40,000 forum about a Land Raider I had equipped with a light-and-sound show: an MP3 player with speakers, plus blinking and continually on LEDs, the former lighting up the exterior through fibre-optics. (Note that I had to disable my adblocker to get that site to load images.)

optics_on_3.jpg

Check the thread for a thorough description, but the basics of it are that I bought some blinking LEDs and soldered them together with some resistors (again, see the thread for how to calculate what you need) into this circuit:

circuit.png

You can ignore the bit on the left with the MP3 player and amplifier, of course. It all looks like this in the flesh:

electrics.jpg

For the fibre-optics themselves, I used a cheap TOSLINK cable I bought at an electrics store:

fibre-optic_cable.jpg

On the left is the normal plug that’s at both ends of the cable, on the right is a piece I cut off and stripped. Initially I wanted to leave the black covering on it, but decided to remove it because it made the cable much thicker and less flexible. Inside the model, I put everything together like this:

electrics_and_optics_in_place_1.jpg

I drilled holes into the sides of bits of plastic tube and glued them into the model, then inserted the fibre-optics. The LEDs sit inside the pieces of tube:

electrics_and_optics_in_place_2.jpg

Here’s the model with the power off and on:

optics_off.jpg
optics_on_1.jpg

The fibre-optics stick out from the side of the model so that I could paint the vehicle without having to mask 1 mm diameter lights: I just painted right over them and when I was done, trimmed the fibre-optics back to sit flush with the sides of the model.
 
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