I can’t believe that it has been over 3 and a half years since I made the first hard drive clock. Since then there have been lots of cool clocks created by some talented people. Jason Amsel and Konstantin Klitenikfrom from Cornell University came up with this hard drive clock version (2nd on page), they added a nice touch screen that can be used to set the time. Ian Smith developed a very stable and finished hard drive clock design which looks like a piece of art! The hard drive clock that Waldeck Schutzer from the Federal University of São Carlos built uses 12 LEDs which make it nice for a very clear position indication (last two images show the results). Baidu built a hard drive clock that has a built in LED display that also shows the time and other messages (first image and video show the results).
Am I missing any hard drive clocks? If you know of another one please let me know in the comments.
Alan Parekh Hard Drive Clock
Below is the Waldeck Schutzer Hard Drive Clock