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How To: Build a Cheap Arduino Tachometer to Measure the RPMs of Spinning Fans (And More)

A tachometer, or RPM counter, is a device that measures the speed of something that's rotating. In a car with a manual transmission, the tachometer can be helpful in determining when to release the clutch and how much gas to give when you're taking off. This DIY Arduino Tachometer by Chris on PyroElectro uses an infrared transmitter and receiver break-beam pair to measure the RPM of a computer fan. When the fan blade passes between the transmitter and receiver, the IR beam counts the interrup...

News: Rocket Power Your Lazy Boy

Since the days of Archytas, rocket propulsion has been the Holy Grail of aeronautics. Thanks to Galileo's inertia, Newton's laws of motion, and the "father of modern rocketry," Goddard, space is not a complete mystery anymore. Rocket-powered aircrafts have evolved from the first liquid fuel rocket in 1926, to the Soviet R-7 which launched Sputnik, to NASA's Saturn V that propelled Apollo 11 to the moon. Today, even billionaire tourists can enjoy space, like Microsoft's Charles Simonyi and Cir...

How To: Do the Dutch hakken dance to Gabber hardcore techno music

In The Netherlands, Gabber Hardcore is the music of choice for rebellious young people, much like punk and underground hip-hop in the US. It is a blisteringly fast style of electronic music which might seem hard to dance to at first. Enter the hakken, the dance of choice for the Gabber listener. Watch this video to learn how to do the hakken, and you will know what to do next time you're at a hardcore club in Holland.

How To: 3D character model the female torso using Maya

The female torso is arguably the most popular thing to depict in the history of art. Go figure. This seven-part video will teach you how to create a 3D character model of a female torso using Maya. The creator uses a background image that we could not track down, but you can probably use an alternative female torso image (as we said, there are many) and follow along just fine.

How To: Learn to play piano with the five-finger exercise

This video will show beginners in piano an exercise that will help in building strength and flexibility in the fingers. The exercise is called the five-finger exercise. The narrator in the video begins by showing you how to play with one hand and then both at the same time. The narrator advises to keep your fingers curled and to make sure you hit the keys with the tips of your fingers. To begin, you place your right-hand thumb on the C note. You then play each note from C to G in order and th...

How To: Scratch on turntables for beginners

The video is from the DJ tutorial and it shows us the basic principles of scratching for the beginners. And the first lesson you should learn is that there are basically four movements and here you will actually be not going to scratch put will be moving the record forward and backward. These four moves form the basis for starting to learn scratching. First you need are the type of sounds which are either acapella (song with no music) or with sounds (tracks with breaks on it). Before starting...

How to Walkthrough Darksiders: The Hollows - Griever

You need to give the Griever's heart to Samuel in this level in the Xbox 360 game Darksiders, The Hollows - Griever. The Beholder door will lead you to a long tunnel where a massive creature called the Torture Coil likes to nab helpless souls who pass by with its giant tentacles. Push the subway car up the track in front of you and the creature will grab the car instead of you. This will clog its hole so you can safely pass by. Head through the hole in the wall at the end of the tunnel. Follo...

Walkthrough Assassin's Creed: Bloodlines: Mission 10

Mission 10 on the Sony PSP takes you through finding the ship for Kyrenia to deliver Alexander's message to the crewmen without being discovered. The path to the Crewman is relatively free of guards if you stick to rooftops as much as possible. Then, leap down to the docks below. The manifest is located on the big ship docked at the Port. Take the ladder down to the deck below and follow your nose to the manifest. With it now in your possession, take it to Alexander. For more info, watch the ...

Walkthrough Assassin's Creed: Bloodlines: Mission 9

In Mission 9 on the Sony PSP, you just need to recapture Maria. Chase after Maria and her captors. You will end up fighting off these soldiers. Once they've fallen to your sharp blade, Maria rejoins you, and you receive a new objective. For more info, watch the whole gameplay.

Walkthrough Assassin's Creed: Bloodlines: Mission 6

See how to infiltrate the Limassol Castle and kill Frederick "The Red" in Mission 6 on the Sony PSP. Guards patrol almost every corner of the Limassol Castle Courtyard, and soldiers armed with sturdy-looking shields block the normal route into the castle. Looks like you will have to find an alternate way. That path reveals itself quickly enough in the form of protruding pieces of bricks along the wall, allowing Altair to gain suitable height above the ground. Jump on the merchant stand roof f...

Walkthrough Assassin's Creed: Bloodlines: Mission 5

Find Osman in the Cathedral Square to deliver Alexander's message to him in Mission 5 on the Sony PSP. Make your way to the Cathedral area, at which point the red delivery icon pops up and denotes Osman's rendezvous point. The only problem is that the area is swarming with guards and that Altair must make successful contact without being detected. Climb up the first buildings in front of you and hop across toward the icon. Silently dispatch the archer on the roof and then head around to the o...

Walkthrough Assassin's Creed: Bloodlines: Mission 4

Learn how to locate the assassinate the Templar Captain of the Guard. Locate him in the Limassol Marketplace in Mission 4 on the Sony PSP. The Templar Captain is as good as dead with his location so boldly announced on the map. A word of caution: if you make a ruckus approaching him, he will be backed up by annoying archers on the rooftops. Once you've found him and carried out the deed in any way you see fit, return to the Safe House for the next objective. For more info, watch the whole gam...

Walkthrough Assassin's Creed: Bloodlines: Mission 1

Successfully complete the introduction to gameplay with Mission 1 on the Sony PSP. This is the brief episode of playing the game. See the introduction of the tale and learn the controls of the game. If you don't properly complete this mission, you won't know how to complete the rest. For more info, watch the whole gameplay.

Walkthrough Assassin's Creed 2: Mission 24

Fox Hunt: When you trigger this mission, you're asked to find a particular man among the crowd in the village square that's marked in green on your map. Use your eagle vision and only the guy you're looking for will glow gold (guards glow red, everyone else is darkened out). When you find the man, approach him for a quick, puzzling cut scene.

How To: Make a cone record player

If you're record player doesn't work anymore, but it still turns, then this is the perfect solution for you. The video show you how to make a cone record player. It's also a neat trick for playing your records with out a record player, instead of a regular phonograph needle.

How To: Build your K'NEX Shark Run Roller Coaster

K'NEX is one of the most popular construction toys on the market, right next to Lincoln Logs and LEGOs, but what makes K'NEX stand out is the fact that children can build mechanically derived toys. Instead of blocks or little logs, kids use interconnecting plastic rods and connectors, which give them tons of contraptions to build and play with. Today, K NEX has even more possibilities with wheels, pulleys, panels and flexi-rods to make amusement park roller coasters, airplanes, animals, bikes...

How To: Build your K'NEX Vertical Vengeance Roller Coaster

K'NEX is one of the most popular construction toys on the market, right next to Lincoln Logs and LEGOs, but what makes K'NEX stand out is the fact that children can build mechanically derived toys. Instead of blocks or little logs, kids use interconnecting plastic rods and connectors, which give them tons of contraptions to build and play with. Today, K NEX has even more possibilities with wheels, pulleys, panels and flexi-rods to make amusement park roller coasters, airplanes, animals, bikes...

How To: Do Bicep Curls for Seniors

Biceps curls are standard exercises for building the muscles of the arm. Seniors should not omit them from their workout. Learn how to do bicep curl exercises for seniors in this strength training video. Take action: use sturdy chair, position hands at sides and palms forward, tighten core, focus on biceps, and keep shoulder from rotating. Tom Clifford, the instructor in this how-to video, has a degree in physical education, fitness and health from Eastern Michigan University, where he ran tr...

How To: Use a metronome as a practice tool for the bodhrán

In this how to video, you will learn how to use a metronome as a practice tool for your Bodhran. This will be helpful as it helps track your progress. You can very tempos with this device. Press the red button of your metronome to turn it on. It should be at 60 BPM. If you want to change the speed, press the buttons with the arrows. Press the top gray button and press the arrow until a musical sign appears. Next, go to the second grouping of notes and press the top gray button. This will sub-...

How To: Properly set up a turntable

Paul demonstrates to viewers how to properly set up a turntable. Each turntable has the same basic parts, so this tutorial should work for most users. There are several components: the platter is the part that spins and it has a slip mat on top. The tone arm is to the right and it has a head shell and stylus cartridge (needle) mounted on the end. The queueing lever is at the base of the tone arm and it raises and lowers the tone arm base. There is also a VTA (Vertical Tracking Angle) adjustme...

How To: Autotune your voice using Mixcraft 5.0

Autotune your voice using MixCraft 5MixCraft 5 is the latest version of the program. The program is an instrumental, video and voice editor. We will be using the audio track. Use your best mike and record a short voice recording. Add a songy tune to it to get the full effect. Go to effect, autotune bst. Use the preset. Input auto is soprano voice, auto correct, left select pitch reference, vibrato on 0 or .1. Format amplitude at 130. Set pitch to 0. Natural vibrato needs to be at a 90 degree ...

How To: Record track automation in Logic Pro 8

First of all you have to go to 'logic pro' and select any instrument you want to play. Here you can choose a synthesizer. Now click on the record button at the bottom and it shall start playing and produce a loop. Now from the side bar you can select the ‘low pass filter’ and change the ‘frequency’. From the new pop out, you can change the volume or the note. You can click in ‘command 'L' to open the keyboard ‘assignments settings’ and click where you want to add it. In this case you have to ...

How To: Install Installous and download free apps on an iPhone

The iPhoneHackers shows viewers how they can install Installous on their iPhone and Download free applications. First, you will need to have a Jailbroken iPhone or iPod Touch with Cydia. Your first step, will be to load Cydia on your iPhone. When Cydia has loaded click on 'Manage' and then 'Source'. Under sources click edit and then Add. Add the source: http://cydia.hackulos.us/ Next, go to search and type in 'Installous'. Click on Installous and then click install. The password for Installou...

How To: Answer "What are your greatest weaknesses?"

This video explains how to answer one of the five toughest job interview questions, this one being "what are your greatest weaknesses?" In it John Heaney of "The Job Shopper" explains that the most important thing about this question is to realize that answering in a way that really paints a negative picture of yourself will negatively impact your potential employment.

How To: Create a "crocodile tears" makeup look

YOUTUBE Logan Salter presents a video demonstrating a method to create "Crocodile Tear" Makeup. The entire video is demonstrated through visual action, with typed titles in green appearing on the screen prior to each new step, and electronica music played throughout. Logan begins by applying moisturizer, demonstrated visually in the video by applying moisturizer to his facial area and moves at an increasingly faster rate through steps visually demonstrating how to apply various powders and br...