Great idea! reminds me of another project that used IR leds behind a blank canvas in an art gallery. When people go to take a picture of "what junk passes for art these days" the secret "painting" is revealed. This is really cool either way, I was just thinking merging the two would be interresting.
Novel use of a LED array. Nice that Allied provided part numbers for the bits they do supply. But it would be useful if the supplier of the non-allied parts were also part of the article. Especially considering that the LED array is fundamental to the gadget.
You know what would be fun? Hang a weight on a rachet (like a pendulum grandfather clock) to spin a motor/generator to provide the electrical energy for this circuit. Lose the AC mains line cord running up the wall.
Whether you're a designer, gamer, or just like to have a busy desktop, two monitors (or TVs) is always better than one. Gadget Freak shows you how to build an entertainment center that can hold two 70-inch TVs.
Are you sick of the same boring badges at every trade show? The ESC 2016 Conference in Boston is featuring an electronic one you can use to play games, control robots, meet new friends, or build your own custom hacks.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.