Step 17: Secondary light sources - Assembling light pipes

I did not want the LEDs to poke straight through to the front. For one thing, 5mm is too wide! Also, the substrate was too thick for an LED to reach all the way through. Instead, obtain a few meters of clear acrylic rod. It conducts light like an optical fiber, only it's 2-3mm in diameter.

Put together a pile of as many LEDs as you'll need, a pile of 2cm-lengths of heat-shrink large enough to go over an LED, and a pile of 2.5cm-lengths of acrylic rod. (You can quite easily cut the rod with a good pair of side-cutters)

Assemble the LED, heat-shrink and acrylic rod together, then using a soldering iron or a heat gun shrink them together. Try to avoid getting the LED too hot, as it can kill them. Repeat until you have a hundred or so of these assemblies. (This is, believe it or not, another step that takes a long time.)

Note: I initially tried melting acrylic rod directly onto the LED. The LED is a different type of plastic so the rod does not 'stick' properly, the acrylic starts to darken when it is heated, and lots of noxious gases are produced. Not recommended.
Do you sell these?
No, not yet. :-)<br><br>At some stage I might sell kits for smaller star maps, if people were interested.
Yessss, do that! That's good idea :)
<p>Really nice! i counted the stars on your map! <br>I started my project some days ago. <br>2,00m * 1,60m <br>0,75mm and 1,00mm Fibreglass for the normal stars<br>2,00mm for the 107 bright stars and 3,00mm for that big one in the centre. <br><br>So for guys who are not good at LED circuits, just use 2-3mm fibreglass instead of 108 single LEDs <br>My Question: <br>1. What is the exact diameter of your acrylic rod and your fibre glass<br>2. What would you do better next time?<br>3. You are my hero</p>
WOW, that is a lot of stars! I wish you all the best for your project.<br><br>What sort of 'fibreglass' are you using? (If it's not specifically marked/marketed as end-emitting fibre-optic, have you confirmed that it properly transmits light? - as the instructable mentions some stuff is *not* suitable)<br><br>Answer 1) I butchered a fibre-optic christmas tree to make my star map, so I never actually measured the fibre diameter. 0.25mm or smaller, I would guess. The acrylic rod is 3mm diameter.<br>Answer 2) Okay, a list...<br> a: Using two halves for the backing ended up being a problem - the middle has gradually sunk and pulled some stars behind the fabric. I'd use a single piece backing and/or make sure the fabric is securely stuck to every part. (or use a different approach, like paint)<br> b: It would have been much easier to use lots of lights and make each sector work independently, rather than one *big* light in the middle. (It's still doable with one big one, just probably easier for layout and planning)<br> c: I really like the 'twinkle' effect I used for a little star map - controlling the LEDs individually with a microcontroller. In conjunction with (b), it would probably be doable at a large scale.<br><br>Actually, there's not much that I'd change. I still love the remote control and the lava-lamps!<br><br>Answer 3) That's not really a question. :-D Thank you for your kind words. It's a big project to tackle, but in my opinion TOTALLY worth it.
<p>i ordered these fibres from Aliexpress:</p><p><a href="http://de.aliexpress.com/store/product/0-75mm-diameter-2700m-roll-PMMA-fiber-optic-cable-end-glow-for-decoration-lighting/312912_1923997993.html" rel="nofollow">http://de.aliexpress.com/store/product/0-75mm-diam...</a><br><br>To make my stars twinkle, i use a small engine to rotate a disc with blue and black paint on it. </p>
<p>Looks awesome so far!<br>I really like how you've gathered and illuminated the fibres.</p>
<p>I need clarification. How exactly were the fibers affixed to the canvas? How and with what?</p>
In summary; a hole was poked through the material, the fibers were fed through, a dab of glue was applied to the back, and once all applied and dried they were trimmed.<br><br>There's more detail in Step #14:<br>http://www.instructables.com/id/Star-Map/step14/Poking-through-and-gluing-the-fibers/
Hi Elisha,<br>It wasn't just canvas - there was a corrugated cardboard layer behind it to help keep the fibers straight and to provide a stronger backing.<br><br>The fibers were put in place, then glued with PVA glue. It's a water based wood glue that's white, and dries clear.<br>You shouldn't use superglue or other solvent glues because it will damage the fibers.<br><br>-MrTrick
<p>Wow! This is a very thorough, well done, Instructable. I have been thinking of doing a ceiling star map, using actual star data, for some time. I have read about many versions of this, using luminous paint or fiber optic cable, but this is, by far, the best I have seen. Some of the highlights of your implementation are the following. First of all, using actual star maps. Most people just wing it and use random patterns, which, IMO, look awful. Second, you actually differentiate the lower magnitude stars, somewhat, with LEDs. I'm thinking, instead, of using multiple fibers, and having several magnitudes. I really like the idea of simply printing out the star maps and using them on the reverse side of the substrate. Brilliant! These ideas could be combined with the ideas of another Instructable, </p><p><a href="http://www.instructables.com/id/Fiber-Optic-Panel-Star-Ceiling/" rel="nofollow">Fiber Optic Panel Star Ceiling</a></p><p>. Thank you for sharing your great ideas. You get my vote for a PRO membership!</p>
Thanks Laral, I'm glad you enjoyed it!<br><br>A full ceiling map would look fantastic, though I think it'd be a *lot* of work to do with real star maps.
<p>You're right. I'll probably never do it. I originally wanted to do it with luminous paint, which would be easier.</p>
Could the star map be cut using a laser cutter to save all that drilling/poking? Guessing the challenge it getting the star map rendered in a way that can drive the laser cutter? Thanks for a great project/work of art.
I've made a similar project, although I didn't use fibres for the lighting, and the drawing I made only took about 15 minutes in AutoCAD. Many of the holes would have been the perfect size to take the fibres, and I'm planning on doing a second version using that lighting method.
Interesting - so are the points of light all LEDs, or is there a backlight?
in the fist version, I used led strip lighting around the inside of the frame, and diffused the light through a piece of parchment paper. I've since replaced the led strips with a 4x4 neopixel array, so I can alter the lighting patterns and brightness easily.
<p>Nicely done. :-)<br></p>
It could...<br>I didn't have access to a laser cutter when I built this one, and it is way too big to fit into any laser cutter.<br><br>A smaller one, definitely. It might be a little bit complicated to convert your design into the right format, and to make each 'point' a little circle for the laser to travel around, and to ensure that the laser is actually cutting all the way through every hole... <br><br>Total effort vs using a cordless drill may actually be higher, depending on your source design and how many stars there are to cut out.
<p>I'm not sure if you're brilliant or simply insane. </p>
&iquest;Porque no los dos? :-D
<p>&iexcl;Eso que s&iacute;! Aunque lo que algunas personas consideran locura es<br>s&oacute;lo la libertad del pensamiento.</p>
<p>Ciertamente. ^_^</p>
<p>Great gift idea for the wife. I'm doing this. I have 6 months. Thx for the writeup!</p>
It took me at least 3 solid months to get done, while the wife was away. (lots more free time)<br>Best of luck, and get cracking!
<p>could you make a small one whith a battery powered string of LEDs (20 long) and put them in a bottle cap and add some small length of fibre optics to them and for some brighter ones just have the led on its own I think this would work but what size do you think is best for it Is 1ft by 2ft about right would be great if you could tell me Thanks </p>
You certainly could do it this way, and the size you've chosen seems fine. (It makes it a bit easier to buy a ready-made frame, so that would give you your size)<br><br>The main thing I'd be concerned about with using ready-made LED strings for both the 'big' stars and the fibre optics is relative brightness.<br><br>LED strings are not that bright, and the fibres in the bundle have to all &quot;share&quot; the brightness of the LEDs attached. I think it might end up making the fibres too dim. <br>It might be better to use the LED string for the big stars, and maybe a LED torch for the fibers?
Thank you for replying and for the useful tips
<p>Might I suggest you record the various scenes onto a HD video disc and offer them up for sale. People could then play them back on their HDTV's and enjoy the views.</p>
Not sure what you mean - it looks cool, but it doesn't move.
<p>I thought I read or saw a photo with constellations shown, I don't see it now. Because it doesn't move is not really a deterrent to selling DVD's. People play DVD's with loops of serene scenes and fireplaces</p>
<p>Thanks RubenS13. :-)</p>
<p>I'm very impressed. A friend of mine is going to make one. Very good work.</p>
<p>Thanks smartrem. :-)</p>
Thanks uwezi. :-)
<p>For a good selection of LEDs, power supplies, and some technical information for selecting components, try LED Supply (www.ledsupply.com). (This is not an advertisement.) I've bought LEDs from them and found them very helpful.</p>
<p>AMAZING!!! </p>
<p>I made a very similar display back in 1970 or so with the &quot;amazingly new invention&quot; of fiber optics! I made a cardboard box of about that same size, about four inches deep and covered in a velvetteen type of fabric. Inside was a single tube 24-inch florescent light fixture. </p><p>I had scale up the map with paper grid squares from a smaller paper star map. The stars were scaled to magnitude by combining various numbers of one-half lengths of the fiber optics glued into holes in the box. Some aluminum foil was glued into the box's interior to spread the light evenly. </p><p>It was really unique in its day. Eventually the black fabric faded and I discarded about my only ever original art work.</p>
Nifty. It must have been difficult to make it work with a flourescent light!
<p>Great one.. but need a loooot of patience to do it. </p>
<p>Great work. Are you in the UK or the USA ? I couldn't find a fibre Christmas tree in any store near us in the USA, we ended up buying one for serious money for our first Christmas here. </p><p>I'd really like to make one of these things.</p><p>Steve</p>
Hi Steve,<br><br>Sorry, I'm in Australia, so couldn't really advise on local stores.<br>You could certainly try eBay or aliexpress?<br><br>If you are just going to disassemble it anyway, it's probably better to buy just the strands; see for example http://www.aliexpress.com/w/wholesale-fiber-optic.html?SearchText=fiber+optic&amp;CatId=39<br><br>(There are a lot more supply options now than back when I originally wrote this instructable.)<br><br>Best of luck with your project.<br>-Patrick
<p>hello mr trick i know this is an old project but i would like to ask you two questions if i may.first how many hours one needs for a project like this if you have all material?second how much did it cost you alltogether?thank you,best regards,and awesome project!</p>
<p>Hi Elmagiko,</p><p>If you make a smaller map, I'd say about $10-50 in materials, and maybe 8 hours of work? (not including time for glue or paint to dry, etc) </p><p>The most time-consuming part is putting each optical fiber through the map - a larger or denser map can take *much* more time, but it'll look great!</p><p>The costs are not very high - you can buy a nice frame cheaply from a dollar store, and a 'UFO' lamp from a dollar store or ebay.</p>
<p>just amazing work. well done looks great and the instructable is great. thank you</p>
<p>Thank you! I'm glad you enjoyed it.</p>
<p>well done looks amazing instructable is great too. seriously well done</p>

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