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How To: Make a Simple Touch-Triggered Transistor Relay

In this article, I'll show you how to make a simple touch-triggered switch. This is very useful for various electronic projects, from a simple bedside light to a flat panel touch keyboard. The circuit can vary in switching power depending on the transistors you use. For example, if you're looking into creating a 120V light that turns on when touched, you'd need two powerful transistors and an isolation relay. However, a simple flashlight that turns on when touched would only take a couple of ...

Quick Start Guide: How to Set Up Your Canon 5D Mark II in 10 Easy Steps

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.

News: Keep Your Car Perfect with Winter Car Maintenance Tips

Cars require maintenance no doubt, but it needs pampering even with the change of weather. Like in summer rainy and winter your vehicle is suppose to be looked after differently. It’s always wise to take measures before the onset of the winter season, to save you from the perils. Car owners can follow regular maintenance schedule to have a perfect care of car and it will help them to have hassle free car drive in all sort of weather circumstances even in mercury boiling temperature or spine c...

Altruistic Hacking: The Rise of the DIY Radiation Detector

Understandably, the tragedy in Japan has substantially risen the level of worldwide radiation-related hysteria. So much so, as an alternative to stampeding health food stores for iodine tablets, crafty individuals and organizations are hacking together personal radiation detectors. Rather than relying on the government, the creation and modification of handheld Geiger counters provides a self-sufficient solution to today's questions regarding radiation. Profiled below, three admirable organiz...

REVIEW: The A-Team

People smile in this movie. This is a genius breakthrough Another day, another remake. Another safe choice during apparently rocky times - this wintry economic climate, don't you know - and we're off and watching Joe Carnahan's big-screen version of the A-Team. In 2010.

Making Electromagnetic Weapons: The Theory Behind EMP Generators

This is the third part of my electromagnetic pulse series (see Part One and Part Two). By now, I've covered the hardware and general concept of electromagnetic pulse generators, but how exactly do they disable electronics? How can an invisible field of energy have such a catastrophic effect on computers, cell phones, and most any other electronics? I'll be answering all these questions in part three of Making Electromagnetic Weapons.

How To: Sprint HTC Evo 4G Impressions

Spent the weekend with Sprint's new phone, the HTC Evo G4. Specification wise, it's better than Verizon's Incredible and T-Mobile's HD2. Apple will be announcing the new version of their phone this week. If it's comparable to leaked phone shown over at Gizmodo, then to say which phone is better is debatable. The iphone might have a better battery life but the Evo has an unlimited data plan, unlike AT&T's new tier pricing structure.

The Sprint HTC Evo 4G: Best Phone This Year

Written by JD Coverly of WonderHowTo World, LoadSave:We've spent the last week with Sprint's new phone, the HTC Evo 4G. Specification wise, it's better than Verizon's Incredible and T-Mobile's HD2. Apple has unveiled the new version of their phone this week and thankfully it's debatable as to which phone is better. The iPhone has better battery life and a more robust App store, but it suffers from a smaller screen, smaller camera resolution, no HDMI out, face talk only on wi-fi networks, and ...

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