Here is a DIY product, a clock that is made of an old hard disk with the guts stripped off. The hard disk clock is the product of some builders from Germany. The rotation speeds of the hard disk is approximately 5000-15000 (depending on the hard disk). You could turn it into a artwork clock, like the Strobeshnik hard drive clock or Arduino controlled hard drive clock. TecoArt’s hard drive clocks are all kinds of awesome. They help our environment by recycling old tech and they are stylish modern art pieces in their own right. They may even open a portal that will allow you to time travel.