Super Magnets from Old Computer Hard-Drive

Inside computer hard-drives are one or two super powerful magnets.  Probably worth a couple dollars, potentially useful, or just fun to have.  Inside the hard-drive, the magnets are usually glued to metal brackets that have holes in them.  You can put screws through these holes to attach the brackets to a wall, and then you’ve got a wall mount for any metal object, such as a tool, that you want to keep handy.

You can find instructions online that tell you how to take apart a hard-drive.  It’s easiest if you have a set of Torx screwdrivers.  Helpful hint: hard-drive manufacturers often hide some of the screws under labels or in other hard-to-find locations.  Getting the magnets out of a computer hard-drive is a fun project to do with a kid.


I Like Plugable

wired_keyboardI don’t believe the “disadvantages” of plugging a keyboard into the back of the computer and seeing the cord on the desktop (the real desktop, not the computer screen) are so bad that it’s worth paying $20 more to get a wireless keyboard.

The wireless keyboard is an even worse deal when you consider that it has the disadvantages of

  • needing batteries that will have to be replaced and disposed of and could die in the middle of the night when getting replacement batteries is inconvenient,
  • being sometimes slow to respond, having a slight delay between pushing a key on the keyboard and seeing a letter appear on the screen, especially for very fast typists (this is something I’ve read in online reviews),
  • using radio signals that might be susceptible to interception by a wireless keylogger. (see “Hackers Can Spy on Wireless Keyboards From Hundreds of Feet Away“)

I use my computer while I sit at a desk.  How far away do I need to be?  It’s a keyboard, not a phone!