I know clocks don't use very much power, but I thought you guys might like this.

That's really neat. Too bad I have neither the materials nor the know how to make something like that for the home. Whether or not clocks use much power, something like this is still very clever and would be that much less power you would need. Thanks for the cool link

No power clocks? Here's one I like. It's a moderne miracle! Guaranteed Accurate to 50 seconds per hour!

i want a south facing paned window broken into slices to denote the hour as the sun passes across the sky.