Computer Fundamentals: Definition, Uses, History, Components
What Is a Computer?
A computer is a machine that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming. Modern computers have the ability to follow generalized sets of operations, called programs. These programs enable computers to perform an extremely wide range of tasks. A “complete” computer including the hardware, the operating system (main software), and peripheral equipment required and used for “full” operation can be referred to
Read MoreField-Effect Transistor (FET) Fundamentals
Understanding Field-Effect Transistors (FETs)
A Field-Effect Transistor (FET) uses an electric field to control the electrical behavior of the device. FETs are also known as unipolar transistors since they involve single-carrier-type operation. Many different implementations of field-effect transistors exist. FETs generally display very high input impedance at low frequencies. The conductivity between the *drain* and *source* terminals is controlled by an electric field in the device, which is generated
Read MoreComputer Fundamentals: Key Concepts Explained
Computer Fundamentals: Key Concepts
What is a Control Unit?
The Control Unit (CU) supervises the input, output, processing, and storage operations. It determines when to start and stop data reception, and where to store data. It manages the step-by-step processing of all operations within the computer.
Memory System Explained
There are two main types of computer memory:
- Primary Memory: An integral part of the computer system, directly accessible by the processing unit. RAM is an example.
- Secondary Memory:
Telephony Concepts: Networks, Devices, and Digital Services
Telephone Network Fundamentals
Subscriber Loop (Local Loop)
The loop is the connection enabling communication within our telephone network. It is commonly known as a two-wire twisted copper pair.
Loop Types
- Multi-pair/Hybrid: A technology combining copper pairs and potentially coax, offering telephony, data return channels (e.g., for satellite TV), and value-added services.
- Wireless Local Loop (WLL): Transmits the telephone signal using radio waves between the subscriber and a base station.
Telephone
Read MoreSystem Programming Concepts: Roles, Areas, and Tools
What is a system?
A set of components that interact to achieve a common goal.
What is programming?
The process that converts system specifications into machine instructions to produce the desired results.
What is system programming?
A set of programs necessary for a computer to operate coherently and monolithically for its users.
What is the role of a programmer?
Programmers play a supportive role in maintaining the operating system software environment used by application programmers and computer operators.
Read MoreUnderstanding REBT Regulations: Key Definitions & Requirements
Understanding REBT Regulations
REBT (Reglamento Electrotécnico de Baja Tensión): This is the primary regulation for implementing low-voltage electrical facilities. Its fundamental objective is to ensure the safety of people and the proper operation of facilities through established technical standards.
BT (Baja Tensión – Low Voltage): This refers to the set of devices and circuits designed to produce, transform, transmit, or utilize electricity at voltages not exceeding 1000V AC or 1500V DC.