tech e blog

Projector

For those who missed out on this tutorial the first time around: Tom's Hardware shows you how to build an XGA projector with 3,500 ANSI lumens for just $300 -- or less.

They took apart a $200 15-inch iiyama LCD, placed it onto a $50 Liesegang overhead projector, and voila, you've got a six-foot display on the wall. It's probably the cheapest way to possible get in on that large screen TV action

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Noise Canceling Headphones

"Kipkay" shows us how to make your own noise canceling headphones for $20 or less.

Make your own noise cancelling headphones that block out traffic noise, screaming babies, airplane noise... for $20! These blow away my Sennheisers

Disposable Camera Taser

A reader sent in this video tutorial on how to make a powerful taser from a $7 disposable camera. Though we don't recommend using it on your friends.

Digital Drawing Board

here.

Yes, you could use these old joysticks for anything like a remote-controlled robot, drawing board, or anything that requires left, right, up, and down buttons. Next time, we will see if we can make a bluetooth joystick...

9V LED Lamp

Here's a simple weekend project that turns a 9V battery into a fully functional LED lamp. You'll need one new 9V battery, one gutted 9 volt battery, three high intensity LED’s (white, 25.000 mcd - 3,8 volt and 20 mA - 35 degrees), and one magnet. Instructions.

Bonus - DIY Drive-In Theater

Popular Mechanics shows us how to build your own nifty drive-in theater with parts you can find at your local hardware/electronics stores.