So you’ve just taken apart a hard drive, and you’re looking at all ... A Hall-effect sensor and a magnet take care of measuring the rotations, feeding its signal into a PIC that calculates ...

Those terrifically strong magnets are good for all kinds of projects ... You’ve no doubt seen clocks made from old hard drives that were kept mostly intact. Many makers including [Jeremy ...

However, you may need to use multiple hard drives for magnets. Rather than a portable drive, you can use an old hard drive as a network attached storage server for wireless access. You will need a ...

As things stand, old hard drives tend to go through a shredder ... actuators and rare-earth magnets. The process reportedly takes between eight and 90 seconds for most hard drives, and around ...