Category: Electricity and Electronics

Electricity and Electronics

Robot Arms

Robot Arms

A robot arm, in conjunction with an end effector (hand, gripper, or tool), is called a manipulator. Some robots, especially industrial robots, are nothing more than sophisticated manipulators. A robot arm can be categorized...

The Internet

The Internet

The Internet is a worldwide system, or network, of computers. It got started in the late 1960s, originally conceived as a network that could survive nuclear war. Back then it was called ARPAnet, named...

The Modem

The Modem

The term modem is a contraction of modulator/demodulator. A modem interfaces a computer to a telephone line, digital subscriber line (DSL), cable system, fiber-optic network, wireless network, or radio transceiver, allowing you to communicate...

The Scanner

The Scanner

A scanner is an electromechanical device that converts hard-copy text and graphics into digital form for processing and storage in a computer. Basic Features Scanners can save untold hours of tedious manual retyping. Suppose...

The Printer

The Printer

There are several types of printer in common use in personal and business computing applications today. The two most common are the inkjet printer and the laser printer. Less often used are the thermal...

The Display

The Display

The visual interface between you and your computer is known as the display. In desktop computers, an external display is often called a monitor. There are two popular types in use for personal computing...

Memory

Memory

In a computer, the term random access memory (RAM), often called simply memory, refers to ICs that store working data. The amount, and speed, of memory are crucial factors in determining what a computer...

External Storage

External Storage

There are several types of external storage (besides the hard drive) in which data can be kept in large quantities. Computer experts categorize external storage in two ways: access time and cost per megabyte...

The Hard Drive

The Hard Drive

At A, an edgewise view of a hard drive, showing four platters. At B, a broadside view of a platter, showing one track and one sector. A hard drive, also known as a hard...

Units of Digital Data

Units of Digital Data

You learned previous sections. Let’s examine them again in more detail, with emphasis on their relevance to computers. Recall that one bit (1 b) is a single binary digit, and one byte (1 B)...