How computers work

How does a mechanical mouse work?

Mouse allows quick and easy access to many icons and operations on the computer, 

such as selecting from a list of possible actions (menu), working with Windows 

and moving files. when you move the mouse, the rubber ball turns and 

runs two rollers, both associated with a wheel with slots. light-emitting

 diode (LED) sends light through the slits and transducers convert 

light into an electrical signal. Pressing the button will send additional information

 to the computer.

1. Roller - Roller turns by turning the rubber ball back and forth

2. Rubber Ball - The ball is turning when you run the mouse over the surface

3. Moving Roller

4. Slotted wheel - This wheel the slots associated with vertical rollers.

5. Light emitting diode

6. Converter

7. Cable coupling

8. Plastic housing

9. Cable - cable connects the mouse to the computer through input on your computer

10. Chip - The chip processes data from the transducer movement and buttons 

before it transmits them to the computer

11. Right button - The button pressing their work to encourage the chip and 

the chip sends signals to the computer

12. Roller - This is moved by rotation of Roller balls

1. Wheel with slots - when the wheel rotates, the movement of the slot next to 

the diode produces light flashes

2. Light-emitting diode (LED) - LED sends light through the slits on the outer 

edge of the wheel

3. Converter - Converter code flashes of light into electrical signals.

4. Roller Lever - Lever roller transfers spin on the wheel with slits.

The data storage area is a set of flat plates coated with magnetized lining.

Data is stored as a series of coordinated 

magnetized area inside the lining, called "domains". To read the data or write, 

a device called an executive device moves 

heads to read or write to position, vertical compared to the disk, while the 

plates spinning at high speed. 

Then, the signals are sent to the head, or the head receives signal, which records 

or reads data.

1.FAT - in one part of the disc, in space to store files, information about the location 

of all files on the disk are stored.

2.Head "write-read" - Head reads and writes data hovering 0.002 mm above the

 plate surface

3.Lever of executive devices - Each head is "read-write" device placed on the

 light handle that rotates around the pin at one end

 and runs heads harmonized

4.Data cable - Trough this cable data flow between the hard disk, and devices 

that we call the "Master Disc". 

This device manages plates spins and data flow between the heads, "read-write" 

and the opposite of it and the executive devices.

5.Block devices executive - executive device receives a continuous 

flow of instructions to run the "read-write" heads.

It can start running heads up to 50 times per second.

6.Magnet

7.Movable coil - coil turns inside of the permanent magnet in the 

centre of the executive device. When an electrical impulse 

reaches the coil, causes her turn, and this in return causes shift of the lever of the 

executive device.

8. Sector - on each track, there are several sectors

9. Step motor - This motor turns plates with speed of several thousand spins per minute

10. Track - Before first use, magnetized coating on each panel shares on the concentric tracks using special signal from the

 computer, a process called formatting.

11. A set of plates - information is stored on both of their sides.

Read-write Head - Once the head is correctly positioned, 

the magnet on top of her sends electrical pulses to ensure 

that the data will be written into the proper sector. Binar data (0 and 1), 

encoded by electric current direction change, 

turn into harmonised patterns in the "domains". The data from the disc is 

read the reversing the procedure, ie the 

passage of "domain" below the 

electromagnet, which induces a current in the wire.

1.Electromagnet - When data is written to disk, electrical impulses arriving there, 

produce magnetic fields that align "domains" 

on the track below.

2. Wire - this wire transfers written or read data registered between the 

"read-write" head and the supervisory mechanism of the disk.

3."Domains" with data - Each domain is arranged in one of two possible 

directions. Changing the direction about the 

previous position of "domains" means 1, and when there is no change means zero.

4. Freely ordered "domains" - Where on the disc were never even written data, 

"domains" are freely ordered.

How do touch-sensitive devices work?

Technologies of touch-sensitive devices to  control a computer are developed in 

two directions. First, the monitor can 

act as a measuring sensor and respond to the tip of your finger or other object 

and turn the touch into an electrical signal. 

monitor systems that respond to touch, are widely used in the management

 of automated counters and other movements

 that require gentle control. Another solution is to use plastic pads as 

measurement sensors. First, they were widely used with 

graphic panels, and today have become an integral part of many 

laptop computers. Movement of the finger

rectangular pad stimulates an identical run of the cursor on the monitor. 

In most of these measuring senses, moving fingers change 

the distribution of electric voltage in switches of the pad causing large 

differences in electrical signals. With the use of pads that

 respond to touch, a moving cursor can reach a speed of up to 100 cm per second.

The system of touch-sensitive monitors - Electricity, released through the

 coating on the base layer of glass, produces a static 

electric field. Touching the monitors interferes with the field, and 

this changes the processor's graphical displays.

1. Base layer of glass - The glass is coated with transparent electro-enforceable 

material

2. Image Processor - The processor constantly scans an image of the electrostatic field. 

when changes occur in the image,

 the processor makes a calculation of coordinates.

3. The appearance of the electric field - a layer of conducting electricity with

 register changes in electrical voltage caused by 

touch.

4. The front layer of glass - the glass is an electrically low voltage field that is 

changeable at the touch of a finger.