Introduction: Intro to EL (Electroluminescent) Wire

At it's core, EL wire is a thin, flexible wire coated in phosphor, when alternating current (AC) is applied it glows brightly. In order to apply AC power, inverters are used to transform battery power (DC) to the necessary requirements. EL tape, panels and EL paint (we won't be getting to that here) work in the same way, they are just in different forms. All these products come in a rainbow of colors, EL wire, being the most used, offers up the biggest selection.

In this Instructable you will learn how to work with each of these EL products and control them using an Intel Edison microcontroller. Digital (your blink) and analog (your fade) will be covered, as well as how to map and trigger these effects to a button and potentiometer.

Step 1: Material Overview

EL products work the same electrically and are all thin and flexible, making them great for all sorts of project. They can be sewn in, wrapped around and glued to clothing, bikes, interiors and anything else imagined. When purchasing, make sure to get an inverter if the product doesn't already come with one. This inverts DC battery power to AC, which is what EL materials need to turn on. Most inverters have blinking sequences built in to them, I suggest getting one that does not, it can potentially get in the way later if it needs to be opened up and modified. An inverter will come mounted in a battery case, or on it's own, both examples are shown in the next step.


El wire can be found in different diameters ranging from .9mm to 5mm and in an assortment of colors. It can come on a reel or cut at specific lengths, usually in meters. Wires can be daisy-chained together to produce longer or multicolored lengths. Adafruit has a great tutorial on how to solder to EL wire.

EL panels are large flat surfaces usually ranging from 10cm X 10cm to 84cm x 50cm. They come in all kinds of dimensions, so if you need something very specific do a little research online to see what's out there. Panels provide a nice even, bright glow across it's surface which makes it great for signage and backlighting. The cool thing about them is they can be cut into shapes, as long as the connector is kept on the panel. Some larger panels have multiple places where it can be connected that allows it to be cut into multiple shapes.

EL tape is much like it's panel sibling except it comes in smaller widths and longer lengths. Usually found in .5" up to 1.5" widths, it comes in reels or cut to length.

Step 2: Power

Since electroluminescence requires AC current, EL wire can not be controlled directly by a microcontroller. Therefore you need an inverter (driver) and a triac.

The inverter needed will depend on how long your EL wire is, an inverter can either be powered by 3V, 9V and 12V batteries or by 110 Volts AC wall current. Buy the inverter that is recommended by the EL product distributors you are purchasing from. Coolneon.com has a variety of inverters based on the length you are looking to purchase. The amount of EL wire/panel/tape that can be powered by a recommended inverter should be mentioned in the description of the product as seen on sparkfun.com.

A TRIAC is a kind of electronic switch that works with AC power. It allows the external power to flow to the EL component the Edison pin is turned on.

Step 3: Circuit for Digital Output

Send an on/off digital signal to your EL material to make it blinky or hook it up to be triggered by a switch (we'll get to that in step 5).

Gather the materials below and hook up the circuit as illustrated. The code is for use with the Arduino breakout board.


You will need:

(1) EL panel or

up to 3 meters of EL wire or

1 meter of EL tape

Adafruit has a wide variety of neat EL products that are ready to plug in, check the Going Further step for more resources

(1) Inverter

(1) 100 Ohm resistor

(1) TRIAC (shown is a 2N6071A, this one works too)

(1) Breadboard

(1) Edison with mini or Arduino breakout board

(some) Jumper wires

Step 4: Circuit for Analog Output

Want the EL wire to do something else other than blink? With a transistor before the inverter, the DC power supply can be PWMed via the Edison.

Gather the materials below and hook up the circuit as illustrated. The code is for use with the Arduino breakout board.

You will need:

(1) EL panel or
up to 3 meters of EL wire or 1 meter of EL tape

Adafruit has a wide variety of neat EL products that are ready to plug in, check the Going Further step for more resources

(1) Inverter

(1) 2N222 NPN transistor

(1) 1K resistor

(1) Edison with mini or Arduino breakout board

(some) Jumper wires

Step 5: Add Inputs

Now that you know how to connect EL wire to a microcontroller and get it to fade or blink, let's add some inputs! For analog input the Arduino shield needs to be used since it supports ADC (analog digital conversion). If using the mini breakout board, you will need to hook up external hardware in order to support analog input.

Depending on what you want to do, gather the materials from the previous steps plus what is listed below.


Digital - To blink EL wire with a push of a button, use the materials required for the digital output circuit plus:

(1) Switch

(1) 10K Ohm resistor

(more) Jumper wires


Analog - To fade EL wire using a potentiometer, use the materials required for the analog output circuit plus:

(1) Potentiometer

Step 6: Uploading to the Edison

The Edison can be programmed via the Eclipse and Arduino IDE. Languages that can be used are C/C++, Arduino language and Javascript.
Intel has extensive documentation on their website for the Edison and Galileo. Below are listed some main steps to be aware of when preparing to upload a program along with links to the relevant pages. For more details and documentation, check out Intel’s Get Started page. There, you will learn how to assemble hardware, download software and find demos along with example code.

Arduino

First, get your Edison flashed with the latest firmware and learn how to connect it to your computer through the USB serial port. Download Intel’s Arduino IDE , when you open it you will see the Intel Edison and Galileo boards under the Tools menu. An understanding of Arduino is recommended before getting started with Intel’s version.

Recommended reading: Getting Started with Arduino

Follow these steps to upload your first blink sketch.


Eclipse

To upload a program via Eclipse, you need to connect the Edison and your computer to the same WiFi network, with the Arduino IDE, it’s not necessary. After flashing the latest firmware and connecting the board to the USB ports, visit Intel's Get Started page and choose how you want to get your board online.

If programming in C/C++, Intel provides example code on their Github MRAA and UPM library pages. Follow the steps on Intel’s website for how to install the Eclipse IDE and how to create a new project , which shows how to upload the blink program via Eclipse to get you started.

If you get stuck, the best place for help with troubleshooting is Intel’s forum.

Step 7: Going Further

Comments

author
lancer525 (author)2016-03-12

Anyone who understands the electronic spaghetti of things like this is one supremely amazing person in my book. Could EL tape be used as a brake light for a motorcycle? Off when riding along, and on when the brakes are applied? Enquiring minds!

author
RussB16 (author)lancer5252016-09-30

easily..... a switch attached to the brake lever would complete the electrical circuit, allowing the cut EL panel to illuminate....

author
lancer525 (author)RussB162016-09-30

There's already a switch attached to the brake lever. It illuminates the existing incandescent light.

My question was, can EL wire or tape be added to the existing wiring in such a way that it would operate correctly. Which now, is an irrelevant question, since I've had someone already wire up LED strips for my extra brake lights.

So, thanks anyway!

author
Samiraawong (author)2016-04-01

Yaaahhhh

author
Yonatan24 (author)2015-12-09

Thanks, DO you have any recommendation for gluing EL Wire?

author
nicholashansen36 (author)2015-06-11

I'm in the process of custom making LED tailight's for my car, And am considering using EL for the running light and the LED's for the actual brake light. I have zero experience with any kind of EL so I could definitely use some advice before I start buying stuff. If I were to use the EL panels could I cut out the middle of it like a big O or would that compromise the EL panel, or do you think it would be better to just form fit an EL wire to the shape I want. also which one do you think would be able to get the greatest light output? Any advice is greatly appreciated!

author
DebuffedHero (author)2015-04-23

I could hug you for this instructable. THANK YOU!!!

author
push_reset (author)DebuffedHero2015-04-23

:)
( ((hug)) )
you are welcome!
Let me know if you have any questions.

p.s. the grey kitty in your photo reminds me of mine
=^..^=

author
DebuffedHero (author)push_reset2015-04-24

Aww. It's a friend's cat and I definitely want to steal it!

author
Whisper219 (author)2015-04-24

Thank you so much for making this 'ible! I have an OC that I want to cosplay, and this stuff will be perfect for the details of her armor! Also, is it possible to use EL wire without using Arduino-Edison? I'm trying to limit my use of Arduino in my creations as much as possible as I would rather be building than debugging code. ;)

author
polkijain (author)2015-04-24

I was wondering if could do something similar with a digital watch el panel.... Cud u pls help me out?

author
The Manic Puppeteer (author)2015-04-21

Ironic that this project is powered with an Intel Edison when it uses AC phosphorescence...

author

LOL Have you read the Oatmeal?

author

No, what exactly is that? This was supposed to be a play on the fact that a device named after Thomas Edison was using power systems perfected and developed by Nikola Tesla.

author

It's an online publication, perhaps Big Baneser was referring this post http://theoatmeal.com/comics/tesla

I feel like I have to confess now ... when configure the Edison board, you give it a name and password. The name I chose was Tesla's Ghost. Just seemed more fitting to me.

author

I wish you could "like" comments on this site!

author

At first I was writing a serious response to your statement about how it was really getting it's power and what the microcontroller was there for. Then I got the joke. Lol.
Awesome.

author
contemplatist (author)2015-04-23

I love EL and you have done a thorough job...but what about its greatest reason to NOT USE IT: the noise. Is there yet any solution to the customary inverter HIGH-PITCHED WHINE?

author
RobinhoodJJ4 (author)2015-04-23

So grateful for this Instructable! Simple and very useful.

author
push_reset (author)RobinhoodJJ42015-04-23

tx! Let me know if you have any questions!

author
gwlinn123 (author)2015-04-23

Great job covering a lot of options! I have been using EL wire for a slightly different purpose - "holiday themed" garage lites. I remove the "standard" lites and replace with some sort of plywood cutout representing an upcoming holiday. For example, a shamrock for St. Pats, an egg for Easter, a firecracker for 4th of July. Each of my two lites uses either colored LED strips or EL wire, or both.

The LED strips require 12 VDC so I use a wall wart for that supply. Then, I modify the EL wire battery pack by replacing the batteries with a DC voltage downconverter so I can drive the downconverter with the same 12 VDC wart. The downcoverter is a simple fixed voltage regulator or a variable one, like the LM317, setup for the correct voltage. The lites are on a timer so they come on and go off automatically. No batteries to change! I've not used the EL panels but I will try to incorporate them into my next garage lite project.

When I want to add effects, like blinking or changing colors, I use an Arduino NANO. These are small and only about $3 on EBAY. I basically "commit" a NANO to each project. No need to take a project apart to re-use the micro. An Edison is probably too expensive NOT to re-use. This may be a good starter project for Edison experimenters.

Again, great job and thanks for sharing, Gary

author
push_reset (author)gwlinn1232015-04-23

Thanks for sharing all that great info! Sounds like you have a cool setup. El panels are a lot of fun, I definitely recommend them.

Using an arduino is much cheaper. This 'ible is meant as a general how-to on EL and as a super beginner project for Edison users. It can also be useful if EL is one part of your more complicated and more appropriate project being built around the Edison.
Thanks again!

author
techniciantanned (author)2015-04-21

Nice...!!

author
audreyobscura (author)2015-04-21

So good. That Dino is perfect. I want to stitch him on to my bike bag!

author
push_reset (author)audreyobscura2015-04-21

I'm glad you like the dino. He's a bit silly, but essential.

author

Oh I didn't know you could cut those panels up! I'm going to have to try this for Burning Man this year!

author

Yes! It changes everything. I still think it's one of the coolest things ever.

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Bio: Specializing in sewing, soldering and snacking. More stuff I do... I teach an interactive fashion and textile class called Wearable and Soft Interactions at California ... More »
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