Clocks made from blinking LEDs always make for fun projects. [Earthshine] built a clock that displays time abstractly using an 8x8 RGB LED matrix. The video embedded after the break illustrates how to read the time but here's the gist of it: One LED is illuminated in the outside box of LEDs and moved in a clockwise motion to approximate seconds. Inside of this, there are four quadrants; upper left … [Read more...]