Post : Cloning a water-based light wall project
URL : http://hackaday.com/2012/08/22/cloning-a-water-based-light-wall-project/
Posted : August 22, 2012 at 10:18 am
Author : Brian Benchoff
Tags : graffiti, led, light, light painting, water
Categories : led hacks

http://hackadaycom.files.wordpress.com/2012/08/water.jpg

A few weeks ago, we featured this water-based LED graffiti art installation (http://hackaday.com/2012/08/12/painting-a-wall-with-light-using-water-as-ink/) that allows anyone to paint in light using only a bottle of water. When one of [Chris]' friends saw the video of this build, he immediately asked him how it worked. One thing led to another, and now [Chris] and a few other members at the BUILDS hackerspace at Boston University are building their own water LED installation (http://happyrobotlabs.com/posts/project/water-led-art-making-leds-light-up-with-water/) .

The basic premise of this build is allowing water to serve as a conductor between the anode and cathode of a LED. Without spraying or painting water on the circuit [Chris] whipped up, there is an infinite resistance between the two pins of the LED and current cannot flow. After applying water to the anode and cathode pads, a small amount of current is conducted through the water and the LED lights up.

Right now, [Chris] is working on a test board with different sizes of pads and spacing to get the best water graffiti LED effect for his future build. The plan is to build a single one-meter panel out of one hundred 10 cm x 10 cm boards connected together with jumpers.

All of [Chris]' work is up on GitHub (http://github.com/cwoodall/builds-water-leds) , and even though [Chris] hasn't begun designing the production boards, it's more than enough to get you started if you'd like your own water LED painting panel.

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