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Why does the neighborhood buck? 

Reading Media

Writing is a very important communication tool. Delivery of messages between a person to another person indirectly usually done through writing. Writings that have been developed by the time include letters, numbers or symbols, some of them even have been used for thousands of years before centuries.

Media of writing was already much developed until now. In the early use of writing a lot of media used are the leaves, clay, or bark. Until finally created paper made ​​from natural fibers containing cellulose and hemicellulose. The first paper was invented by Tsai Lun and continues to grow as the main medium of writing. The paper is widely used to store the text in the form of novels, newspapers, magazines, media and other images. We read a lot of writings on paper in various forms.

With the increase of technology, now has come a variety of electronic reading media named e-book that manythings can be downloaded from the Internet. Subsequently a new hobby called e-reading, ie reading books, novels, magazines and other in e-book form. E-reading is actually a tip about reading e-books using a variety of devices such as mobile phones, tablet computer, laptop, or PC. This hobby suddenly became popular when many endemic tablet computer. Not just for reading e-books, tablet computers can also be used for internet browsing, watching movies, download and use a variety of applications and games, and much more.

This is one a tablet computers.

How a Sewing Machine Works?

There are many type of sewing machine that available for us to used. Classic sewing machine use our arm and leg to drive it. But now, there are portable electric sewing machine. It driven by an electric motor that controlled with footcontroller.

Both classic sewing machine and portable electric sewing machine uses the similar work principle.

When we push the foot controller, the motor spins and rotate the hand wheel. This hand wheel rotation then cause the needle bar, which bring the needle, go up and down. As looping hook move rotate, and feed dog move back to the top and move forward under surface.

Its movement bring the yarn over needle, then take yarn over the hook carried by the needle to be met orassociated with the yarn, while the feed dogs move the fabric. The meet between the hook and needle under the fabric form stitches.
Electric motors are commonly used on the sewing machine is an asynchronous electric motor

There are two kinds of electric motors:
1. synchronous electric motor, and
2. asynchronous electric motors

Why used asynchronous electric motors?
Because the motor speed can be adjusted by changing the resistance value at the footcontroller. The resulting value of the voltage or current to the motor turns.
The electric motor is connected to the sewing machine hand wheel through a drive belt.