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How To: Connect the y-axis motor wires for a CNC router

A CNC router machine is probably the most useful tool a hobbyist can own, but the price for a CNC machine on the market is way more than the average hobbyist is willing to spend. You can build your own CNC with very basic tools, little knowledge of machinery, mechanics, or electronics, but be warned, these machines are inherently dangerous, so wear the proper protection and use common sense. At the very least, read the instructions and precautions on every tool you use.

How To: Fix error code 86420 and change your NAT type to open

In this tutorial, we learn how to fix error code 86420 and change your NAT type to open. First, go to the website to change the settings for your Linksys router. Next, go to the applications tab that says "applications and gaming". After this, go to port range forwarding, then write in a name next to where it says "application name". Under "start" write the number 1 and under "end" write 6553, then keep "both" marked under protocol. Next, enter in the last 3 digits of your console's IP addres...

How To: Experiment with temperature using glow sticks

In this video from Dr. Carlson, users are shown how to witness the effects of the relationship between temperature and matter firsthand, using light-sticks. For the experiment, users need 3 beakers (or vessels of the sort,) and 3 light-sticks of the same color, shape, and light. To test the range, each beaker must correspond to one of the following states: room temperature, ice-water, or boiling water. Deposit a stick in each of them and observe for two minutes. Thus, one will see how the ato...

How To: Prevent gastroesophageal reflux disease (GERD)

In this video tutorial by Dr Suzann Wang you will learn how to prevent gastroesophageal reflux disease (GERD). It is a hyper or low acidity problem in the stomach. The ph factor measures the acidic or alkaline nature of anything and it has a range of 0 to 14; 14 being highly alkaline and 0 being highly acidic. The stomach acidity tends to be 2. 0 which is pretty acidic. The acidity should be 2. 40. If the acidity is lower, it affects the rest of the digestive system. You can rectify this by t...

How To: Get the radius and area of a circle with circumference

This video from Your Teacher is one of a range of math solutions. (which is the measurement from the center to the edge when drawn in a straight line) and also the area of the circle, is the amount of total space within its perimeter. The circumference of this circle is 20 pi. The circumference is 2 pi r. So 20 pi is 2 pi r. Which factors down to show that 10 is the radius (10=r). The area is pi r squared. As we know the radius is 10, we can work out the area - 100 pi.

How To: Do a tactical knife trick in COD: Modern Warfare 2

This video shows you how knives can be much more than a short range weapon in the online mood of the game, Call Of Duty: Modern Warfare 2. KamikazeWaffle and other players show you 50 ways of killing you enemy using the knife. Some of those tricks involve throwing the knife across a map and still hits its target. They also demonstrate how any objects around you can be used to change the direction of the thrown knife to the desired destination. Kill cam is recorded for each of the 50 tricks so...

How To: Understand mean and standard deviation

Keith M. Bower explains the meaning of mean and standard deviation. This educational video gives insight in the basics of statistics. The relations between population mean and sample mean and between population standard deviation and sample standard deviation are explained. The mean gives an idea on the central tendency. Standard deviation gives an idea about how spread out the data are. Keith also explains how these two parameters, the joint sufficient statistics, define a normal distributio...

How To: Make a paper mache cave

A short informative video showing how to make paper mache. A great arts and crafts project for some simple fun or your child's school science project. Easy to make with just flour, water, salt, and some old newspaper. Apply the mixture to a wire frame or a box like in the video to make a paper mache cave. It's very easy to make and you can create a range of things from masks, volcanoes, and most obviously caves!

How To: Convert videos to DVD on Windows using DVDStyler

This video shows you how to convert videos to DVD using a cross-platform free, open-source authoring application called DVDStyler. It has a wide range of features, and this video shows you how to use it in the Windows OS. This program will also work for Ubuntu Linux. Update your videos today and make them look spectacular!

How To: Do the silly spinning siren voice exercise

This how to video is a singing lesson to introduce resonance, which produces beautiful tone quality. You will learn how to do the silly spinning siren exercise which will help you improve your range and vocal technique. With the exercise in this video you can become a better singer.

How To: Warm up your voice before singing

This 4 part video series is a gift from me to all the other singers out there who have shown me such great love and support. It contains a full vocal warmup that will improve tone, expand range, and increase control. This is pretty much the kind of warmup that I might do with a private client, but it's for you guys - free of charge.

Hacking Gear: 10 Essential Gadgets Every Hacker Should Try

If you've grown bored of day-to-day hacking and need a new toy to experiment with, we've compiled a list of gadgets to help you take password cracking and wireless hacking to the next level. If you're not a white hat or pentester yourself but have one to shop for, whether for a birthday, Christmas present, or other gift-giving reason, these also make great gift ideas.

How to Hack Radio Frequencies: Hijacking FM Radio with a Raspberry Pi & Wire

In our first part on software-defined radio and signals intelligence, we learned how to set up a radio listening station to find and decode hidden radio signals — just like the hackers who triggered the emergency siren system in Dallas, Texas, probably did. Now that we can hear in the radio spectrum, it's time to explore the possibilities of broadcasting in a radio-connected world.

Sorting (Part 3.0): Insertion Sort

Note: a bug was found in the Insertion Sort implementations. The bug was corrected in each language. Please refer to the pastebin links for the most up-to-date versions of the sample code. Any screenshots may be behind. More about the bug can be found here.

How To: Make an SMS Intruder Alarm

This tutorial shows you how to create an intruder alarm that sends you text message alerts when motion is detected. This may sound complicated but I am pretty confident any beginner with electronics should be able to do this just fine. The range sensor senses motion and tells your Arduino board to send the text (SMS). So you can leave the intruder detector at home, connected to your network, and still receive the SMS alerts, no matter where you are, as long as you have cell phone service.