1. OBJECTIVE
In the past, with the advent of electronics, devices were developed based on analog systems. With the advancement of knowledge in the area, other devices were designed, using digital electronics, from the 2nd generation of computers.

Digital systems are composed of basic logic circuits, known as digital logic gates. These digital gates use binary logic signals and Boolean algebra to create sequence or combination digital circuits, for example.

In this experiment, you will develop a digital circuit simulation project using the most common logic gates.


At the end of this experiment, you should be able to:

reinforce concepts about digital logic gates;

develop the truth table of some logic gates in practice;

use logic circuit simulator software;

analyze the operation of a simple digital circuit.

2. WHERE TO USE THESE CONCEPTS?
Currently, most electronic equipment is made up of digital integrated circuits. From the simplest, such as household equipment, to the most complex, such as robots in automobile assembly lines, they all use the same digital logical operating principles.

Consequently, for the development and maintenance of these systems, it is essential to know the application and functioning of logic gates.


3. THE EXPERIMENT
To carry out this experiment, you will use hardware and software resources. With a computer (hardware) and a computer-aided design (CAD) system for simulating integrated circuits, you will develop logic circuit structures by applying knowledge about the most commonly used digital logic gates.


4. SECURITY
It is recommended to always use genuine software, especially your operating system, to avoid information security risks. Always keep software updated to avoid problems related to information security and performance (malfunctions or slow execution, for example).

It is also desirable to have antivirus software installed. In a real environment, it is necessary to be careful with physical connections, voltages and electrical current, to avoid accidents, such as shocks or damage to circuits.


5. SCENARIO
In the design and implementation of computers and other modern devices, such as equipment for digital automation systems (e.g. programmable logic controllers - PLCs), it is necessary to develop and implement the logic for producing the desired outputs in the equipment, which are dependent on the various signals input.

In this sense, it is essential to know how the AND, OR, NOT, NAND and NOR logic gates work, for the correct development of the various digital devices and systems.