Piezoelectric Energy In this article, I'll show you how to make a small, wallet-sized device that generates electricity from kinetic energy. The concept is simple: Piezoelectricity is the charge that is produced when certain solid materials (commonly ceramic and crystal) in response to mechanical stress. Piezoelectrics have many applications; in speakers, actuators, sensors, even fuses. For more information, click here.
Vibrate is not as inconspicuous as one might think, which means silent mode is usually the option that many stick to when in class, at work, or anywhere that forbids loud noise.
You're sitting in front of your grandmother's Windows XP machine that has the worst infection you've ever seen. Safe mode? No dice. Restore points? They're compromised. Even worse, all of the files are hidden and none of the executables will run! This leaves her computer in a bricked state. Without some serious CPR, it will be lost to you. Sure, you could just reinstall the system, but then you might lose all of that valuable data.
Before jumping right into becoming the next James Neely or Moose Peterson, you're going to have get situated with your new digital SLR. No matter if you purchased the Canon EOS 5D Mark II body and lens separately or together, you've got everything you need to get started except the CompactFlash (CF) card. If you plan on shooting in RAW or capturing HD video, I suggest getting an 8GB or larger CF card. If you can afford it, maybe even opt for a high-speed UDMA card.
As 2009 comes to a close, the Telegraph presents a compilation of this past year's wackiest inventions. As always, here at WonderHowTo, we are inspired and impressed by ingenuity. The contraptions below range from utter silliness (engagement ring bra) to downright amazing (see-through concrete). Check it out.
What you need All you need is little program named Cheat Engine, and you can download it from here. And it is totally free.
