Electroluminescent wire is a thin copper wire coated in a phosphor, which glows when an alternating current (100V) is applied. Unlike a LED strip it’s not a series of point but an unbroken line of visible light in all 360 degrees. The brightness of this technique is sufficient for the application and because of the very flexible nature of this material it can be easily incorporated in many different applications.
In this instructable I will explain how to apply fade effects to EL-Wire.
Step 1: Possible techniques
A problem with changing the frequency is the color change in the electroluminescent wire, above the 2000Hz the wire will quickly change to a lighter color, for example from dark blue to aqua blue. This behavior is not desirable in my application, but a slow fade effect to show the user the device is in progress is.
link to tutorial with 555-timer: http://hackaday.com/2011/07/13/color-changing-el-wire/
next step how does it work
Step 2: How does it work
Testing with a variable power supply showed a very nice color change of the electroluminescent wire and also showed that the inverter is capable of handling much lower voltages to completely fade out the electroluminescent wire. The next task was developing a variable power supply which can be adjusted with an Arduino.
Step 3: What do you need?
This was my shopping cart
EL Inverter - 3v
EL Wire - of your favourite color 3m
Voltage Regulator - Adjustable