Water Light Graffiti
Flowing DataTake a LED that lights up when exposed to water, then thousands more, and you have one very entertaining re-usable graffiti wall.
Published in Weekly Filet #82
The Weekly Filet brings you the five best links of the week, every Friday. Making sense of the big issues of our time (with a healthy dose of serendipity and nerdiness). Brought to you by journalist David Bauer. Trawling the web for hidden gems since 2011.
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