In this instructable, I will show you how to create a wand (of sorts) to enable you to write in the air, like the picture above shows.

Step 1: The Hardware

You will need:

- Soldering iron
- Solder
- 5 3v Green LEDs
- pinned jumper cables

Note: Instead of soldering, you could do this on a breadboard.

The Circuit:
wire all of the ground pins of the LEDs together, and put a jumper cable from there to ground on the Arduino. Wire each individual LED's anodes to 13, 12,11, 10 and 9. from top to bottom. The resistors were a mistake when I designed it. Sorry, the picture is sideways.

Step 2: Code

There is a screenshot of part of the code above. the file is in a .txt format but can still be opened with Arduino's IDE. Use the functions to spell out what you want to say in void loop() like this:

h();
e();
l();
l();
o();
etc.

You need to have a camera capable of long exposure for this to work.

arduino_letters.txt
Download

Step 3: Done!

You are done! Have fun creating your own floating words. I will come out with some add-on files for this build including some awesome graphics I am currently working on. Feel free to post what you made in the comments, I would love to see how they turned out for you!