Picture of Giant 100mm LED
This is a hand made 10x scale model of a 10mm LED that gives off light via 3 one watt LEDs inside a custom made resin cast (made by me) that also has a Pulse Width Modulation (PWM) light dimmer. To set the cast I first had to create a wooden form of an LED and slather silicone on to create a mold so that I could pour resin into it.

If you have any improvements that you like to be made note of, please leave a comment!

This is part of the Craftman contest, so if you liked this instructable, please vote for me between january fifth and eleventh by hitting the vote button in between those dates (a vote is different than a rating, but ratings are welcome too ;) )

I give you one of the world's largest, DIY LED.
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Step 1: Table of Contents

Picture of Table of Contents
This is a somewhat complex instructable involving the following skills:
--soldering/electronic knowledge (Must know how to read schematic, but if you cannot, please ask questions by leaving a comment)
--Wood work (need to be able to use the following: lathe, coping saw, various sanders, drills, etc)
--Resin Casting (This was my first real time casting anything, so don't worry about it)

I have broken this instructable up into the following:

--Forming the Wooden LED: steps 2-10

--Making a Mold of the Wooden LED: steps 11-12

--Electronics: steps 13-16

--Casting the LED: steps 17-20

--Finishing Up: steps 21-23

Step 2: Materials for the Wooden LED

Picture of Materials for the Wooden LED
For forming the "head" (The epoxy part of a normal LED, the thing that kind of looks like a bell) of the LED you need:

various lathe tools
Coping Saw
Vibrating Sander
Belt Sander
Chisel (or some tool to scrape off glue)
Radial Arm Saw (or some other way of cutting up the pine board)
Putty Knife (optional, but nice)

1" x 6" x 8' piece of pine
Wood Glue
Paper towels

Safety Glasses (necessary), ear protection (highly recommended), Respirator (highly recommended, especially while sanding)

Step 3: Cut the Board

Picture of Cut the Board
You will need to cut your board into 8" segments (you need about 6-8 segments). The goal is so have an 8"x5.5"x5.5" block. The 1" thick wood is really about 5/8ths, and 6" wide is more about 5.5" (it's because the dimensions are pre-processing).
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great work =)

cj86751 year ago
If the glove got caught in the piece your turning it would snap your wrist and bring your whole arm into the lathe
kris754a1 year ago
try make a 8x8x8 LED cube out of it LOL :-P
hec3173 years ago
Shouldn't one "leg" be smaller than the other?
zack2473 years ago
ooh, i like this.
id do this except with a 0603 style LED just for kicks.
make a giant ir tv remote!!
it's so big
this looks wrong btw
11618583 years ago
you should have a black comfoter and a silver and black alternating bedskirt and it would look like a processor chip
holy crap... plum creek's the tree farm above my property!
sysop3 years ago
Love it!
Simple suggestion: What about making the LED leads/supports using square tube stock instead of the round tubes?
Nice radial arm saw. Is that in your house? also i'm going to assume you didn't have a fume hood in your house as well. But all in all, a very cool project. Just out of curiosity, how heavy is the damn thing?
Monsterguy3 years ago
That's wonderful! :)
ps3king13 years ago
ill buy one, how much?
Next up -- Jumbo sized incandescent bulbs!
randofo3 years ago
Sometimes I feel like I have seen just about every project on this site, but every once and a while I still run into something new from the archives and think "Wow! That is awesome!" This is one of those projects. Nice job. Really digging this.
Wally_Z3 years ago
Could you add a potentiometer or rheostat to change the brightness easier?
chicopluma3 years ago
OMG I knew optimus prime eyes worked with led and here is the proof hahaha
awsome proyect
SHIFT!4 years ago
How come I've never seen this before- this is AWESOME!
jamesorlov4 years ago
it;s great! ))
hintss4 years ago
we should have a giant SMD LED. and a giant arduino.
ElvenChild4 years ago
which end is +
The longer one.
Kryptonite4 years ago
I love the rating this has got.
wobbler4 years ago
A bright idea!
zombiefire4 years ago
ill make a much simpler instructable simular to tis soon
Blackice5044 years ago
This is so cool in a geek way i will build one as well but with some differences but thank you for the idea keep up the great work.
Rimwulf5 years ago
Can't I use casting wax to make the the dye instead of wood?
Highjump445 years ago
 instead of spending so much time and money on the the wooden mold couldn't u just put the resin into a trashcan or a drinking glass, vase ,etc  
Jodex5 years ago
wyzzz5 years ago
you are the real winner, its great.
wyzzz from vienna
I absolutely love it! Fantastic job!!!
NYPA5 years ago
Imagine a light board of these!
moshee5 years ago
you could make it detachable by putting 2 giant breadboard-style holes in the base
Dagon3275 years ago
What about grinding off the lip on one side for the cathode?
That is pretty impressive. I think I would try sand blasting it to make it evenly mat. Or you could do like they use in industrial plastic manufacturing and dip the thing into acetone. (providing this plastic is sensitive to it) it will make it shiny. ( this is what they use for screwdriver handles at Stanley) Anyway, This is really cool Idea! Congrats...
eng.germano5 years ago
What did you use to fill it? What material?
rpjamess16 years ago
Another way to find center, and easier than using the triangle method, is to take a ruler that goes through a 90 degree angle, place the cylinder (of big LED) into the angle and draw a line. Rotate the cylinder, draw another line. The intersection is the center.
So, what you are saying is, "If you have a neat tool designed to find centres, use that, as it is easier"? It's only easier if you have the specialist tool. Otherwise a regular ruler is much, much easier.
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