Computer Hardware and Safety: A Comprehensive Guide
Cable Type
External Power
Internal Power
Class Motherboard (Mother)
ATX -> Created by a group led by Intel in 1995, it introduced external connections in the form of an I/O panel and defined a 20-pin connector for power. It is used today in several variants, including extra power connectors or size reductions.
AT -> One of the larger formats in the history of PCs (305 × 279-330 mm), it defined a power connector consisting of two parts. It was widely used from 1985 to 1995.
Devices
- DVD Drives
- Floppy 3.5/1.44
SATA Cable
IDE 40 Threads
IDE 80 Threads
SCSI Cable and Terminator
SCSI -> Small Computer System Interface. A standard interface for data transfer between peripherals on the computer bus. Both the motherboard and the device must support and have a SCSI controller.
It is used especially in devices such as hard drives, CD/DVDs, etc., although in principle any SCSI device could be supported, such as printers or scanners. SCSI is used in computers that require high performance.
Support for SCSI devices can be added through an expansion card to the motherboard. Two SCSI interfaces may be incompatible because there are many variants (even if it is standardized in ANSI).
Cable Series
Cables The Universal Serial Bus USB (Universal Serial Bus) or Universal Serial Driver (CUS), commonly abbreviated USB port, is used to connect peripherals to a computer. It was created in 1996 by seven companies: IBM, Intel
Audio Cable
Display Cable
VGA Analog
S-Video
DVI Digital
HDMI
Parallel External Cable
DB25
Centronics
Cable Series 9 Thread
Cable Series 25 Threads
USB Cable
(A, B, Mini)
Cable Network
RJ-45
RJ-12
BNC Cable
You BNC
BNC Plug
Keyboard and Mouse
DIN
Mini DIN
Joystick
Safety
Tower
Mid-Tower
On Board
Server
The Law on Prevention of Occupational Risks regulates workplace safety and describes how work activities should be performed with sufficient safeguards for the worker.
Safety and health are also taken into account in the Constitution and a series of directives of the European Economic Community.
Labor Risk: The chance that a worker suffers damage from a particular work.
Or Imminent Serious Occupational Hazard: The one that is reasonably likely to materialize in the immediate future and that may pose serious harm to the health of workers.
Prevention: The set of activities or actions taken or planned in all phases of business activity in order to avoid or reduce risks arising from work.
Status of Work: Any characteristic of work that can have a significant influence on the generation of safety hazards and worker health.
Damage from Work: Diseases, illnesses or injuries sustained by reason or occasion of the work.
Teamwork means any machine, apparatus, tool or installation used at work.
DAMAGES CAUSED BY WORKING CONDITIONS:
Occupational Disease: is one that concerns a professional group, caused by constant exposure to adverse situations. They are legislated under collective
Accident at Work: Event that occurs incidentally and which causes harm to the employee.
RISK FACTORS:
Electric Power Facilities: Computer systems are powered by electricity, which may cause electric shock to the worker.
Materials with Fire Risk: Because it can cause electrical shorts, flaming not only on the computer but also in the wiring of the building.
Handling of Tools: The use of tools presents a risk to the worker.
Awkward Postures: The position taken in the development of our everyday work can be a source of physical problems in the worker.
Handling of Loads: The transport of heavy equipment can cause physical damage to the worker.
Mental Workload: The concentration for long periods of time by the employee may also be a risk factor.
SOME PREVENTIVE MEASURES:
· Information and education working group.
· Medical examinations.
· Inspection and analysis facilities.
· Hygiene at work.
· Ergonomics (Study of biological data and technology applied to problems of mutual adaptation between man and machine)
ELECTRICAL HAZARDS:
When handling electrical components, there are two types of electrical hazards:
· Risk of Electric Shock: Two poles to play along different potential, which in turn can cause burns, falls or blows.
· Risk of Fire: Caused by excessive intensity in an appliance.
· Hemorrhage:
· Wash wound
· Remove foreign objects
· Disinfect
· Cover the wound if there is risk of contact
· Burns
· Remove clothing from the burned area
· Apply cold water to the burned area
· If pain persists, see your doctor
· Emergency Eye: They must be addressed exclusively by the ophthalmologist
· Toxic Chemicals:
· Corrosive substance: Drink milk or water
· Substance Acid: Take Magnesium
· Alkaline substance: Take vinegar or lemon
PHYSICAL HAZARDS TO AN INSTALLATION COMPONENTS:
· Court: Caused by sharp tools, sharp or metal elements of the computer.
· Crushing caused by falling heavy materials such as monitors.
· Fire, electrical shock or by heating.
· Toxicity: Exposure to toxic electronics.
8 Bits = 1 Byte
1024 Bytes = 1 KB
1024 KB = 1 MB
1024 MB = 1 GB
1024 GB = 1 TB
1024TB = 1 PB
Processor
It is the main part of the computer, it runs the programs and performs necessary calculations for its operation.
Control Unit (CU)
It is the thinking unit of the computer. It gets the software instructions being executed and the chains, interprets and transforms them into precise orders sending the remainder.
Functions of the UC
· Analyzes and interprets program instructions being executed by the computer. It controls the computer.
· Controls other physical components of the computer
· Attends and decides on possible disruptions that may occur in the process
Arithmetic-Logic Unit (LAU)
It is responsible for performing all the operations you can perform on your computer.
This receives the data with which the UC operates, after completion of operations, it returns its result to main memory.
ASCII Code
The ASCII code is used for representing information in computers but was designed for transmission.
It includes 256 ASCII codes divided into two sets, standard and extended, 128 each. The union of these sets can represent all possible combinations of 7 or 8.
EBCDIC Code
It was the first to be conceived as internal code of computers. The coding scheme was designed by IBM for use on their computers as a standard method of assigning values to road alphabetic characters, numeric score and transmission control.