COMPUTER BASICS Lesson 2: Input Devices

1. COMPUTER BASICS Lesson 2: Input Devices By the end of this lesson, learners should be able to: List and describe how input devices work

2. Input Devices • Input devices are connected to the computer through ports or sockets. • Some of these peripheral devices are used to enter information into the computer. • They include keyboards, scanners, joysticks and digital cameras.

3. Keyboards The main part of a computer keyboard has • alpha-numeric (letter and number) keys • Escape key, labeled Esc • The Function keys, along the top of the keyboard, are labeled F1, F2, up to F12. • Print Screen, Scroll Lock and Pause/Break keys • Enter key • Control (Ctrl), Alternate (Alt), and Shift keys

4. Keyboard • Backspace key • Cursor control pad - Delete key - Insert key - Home key - End. - Page Up and Page down • Number pad

5. Mice • The mouse is the hand-held device that lets you point to objects on the screen, click on them, and move them.

6. 4 techniques for using the mouse • Click • Drag • Double-click • Right-click

7. Scanners A scanner allows you to copy an image into your computer. There are three main types of scanners: • Hand-held scanners work like scanning guns used at department stores. • Sheet-fed scanners look like a printer and can scan only loose, single pages. • Flatbed scanners look and act like a copy machine.

8. Scanners • Resolutions -dots per inch (dpi) • Formats -JPEF -GIF -TIFF

9. Microphones and Joystics • A microphone is another type of input device. Connect the microphone to the computer and use the computer to record sound. (Some computers have internal microphones.) You can also use a microphone to teleconference with another computer user. • A joystick is a lever used while playing a computer game. There are a variety of different joysticks. If you're looking for a joystick, consider your system's requirements, and whether or not you have a USB port or a gameport.

10. Digital Cameras • A digital camera lets you capture a picture in digital (computer-readable) form and lets you transfer that image directly from the camera to the computer. It's a handy tool for taking those pictures you want to email to friends or put on the Web. • A digital camera is similar to a standard 35 mm camera, but it doesn't use film. Instead, it uses an image sensor to capture hundreds of thousands of tiny squares called pixels. These pixels make up a photo. • When you use a digital camera, you can also preview your pictures before printing them. If you don't like what you see, you can edit or delete them.