The mouse - SS1 ICT Lesson Note

A mouse, in the context of computer hardware, refers to a pointing device used to interact with graphical user interfaces. A mouse is a hand-held pointing device that typically consists of two main buttons (left and right) and a scroll wheel. It also often features additional buttons on the side for extra functions. The bottom of the mouse usually has a sensor or optical mechanism to track movement. 

 

Components of a mouse

1. Buttons: A standard mouse usually has two primary buttons (left and right), which are used for clicking actions. Some mice also include additional buttons that can be programmed for specific functions.
2. Scroll Wheel: The scroll wheel is located between the two primary buttons. It allows users to scroll through documents, web pages, and other content vertically.
3. Body: The main body of the mouse is ergonomically designed to fit comfortably in the user's hand. It might have a contoured shape to reduce strain during prolonged use.
4. Cable or Wireless Connectivity: Mice can be connected to a computer either through a wired USB cable or wirelessly via Bluetooth or other wireless technologies.
5. Optical Sensor: Most modern mice use optical sensors to track movement. These sensors capture the surface's texture and translate it into cursor movement on the screen.
6. DPI (Dots Per Inch) Control: Many mice offer adjustable DPI settings, which control the sensitivity of the cursor's movement. Higher DPI values result in faster cursor movement.

Source:(britannica.com)

 

Function of a Mouse

The primary function of a mouse is to provide a more intuitive and efficient way to interact with graphical user interfaces. It allows users to perform actions such as:

1. Pointing: Users can move the cursor on the screen to point to different objects, icons, or options.
2. Clicking: By pressing the mouse buttons, users can perform clicking actions to select items, open files, launch applications, and interact with user interface elements.
3. Double-Clicking: Double-clicking a mouse button is a common action used to open files or folders.
4. Right-Clicking: Right-clicking provides access to context menus that offer additional options related to the selected item or interface element.
5. Scrolling: The scroll wheel enables users to quickly navigate through lengthy documents, web pages, and lists.
6. Dragging: By holding down the mouse button while moving the cursor, users can drag and drop files, icons, and other elements to different locations.

 

Types of Mice

Source:(en.wikipedia.org)

1. Mechanical Ball Mouse: These older mice have a rubber ball on the underside that rolls as the mouse is moved, translating the motion into cursor movement. They're less common now due to accuracy issues.
2. Optical Mouse: These mice use LED (Light Emitting Diode) and a sensor to detect movement on a surface. They're more accurate and don't require a mousepad.
3. Laser Mouse: Similar to optical mice, but they use laser technology for even more precise tracking.
4. Wireless Mouse: These mice connect to the computer without a physical cable, often using Bluetooth or a USB receiver. They offer greater mobility but require batteries or charging.
5. Gaming Mouse: Designed for gamers, these mice often have additional buttons, customizable features, and high DPI (dots per inch) settings for precise control.
6. Trackball Mouse: The trackball is stationary while the user rotates the ball to move the cursor. This can be more ergonomic in certain situations.
7. Touchpad: Found on laptops and some standalone devices, touchpads allow users to control the cursor by moving their fingers directly on the touch-sensitive surface.
8. Air Mice or Gyroscopic Mice: These mice don't require a surface; users control the cursor by moving the mouse itself in the air.