This LED Hard Drive Clock spins amazingly and projects beautiful colors. It is a great way to make a useful clock that presents more than just the time, and utilizes an old Hard Drive which would be of no additional use.
The tutorial found at Ian’s page illustrates and explains how to make the LED Hard Drive and all the steps involved, images, and external links for further reading and/or help.
You can definitely see the great imagery in the LED Hard Drive Clock found here, and also watch the action video of it right below. For a less Technical clock project, you can learn How to Make an International Clock.