Mecatronica

Practice 1 Logical Gates.
Daniel Campos Chávez Yair García Trejo
UPA MTR 3ª A

Abstract—in digital electronics, there are a number of problems to solve commonly recurring. For example, it is common that when designing an electronic circuit need to have the opposite value to a certain point, or when a certain number of buttons are activated, an output remains off. All these situations can beexpressed by zeros and ones, and processed by digital circuits. The basic elements of any digital circuit are logic gates. Digital circuits (logic) operating in binary mode where each input voltage and output is a 0 and 1, the nominations represent 0 and 1 voltage predefined intervals. This feature allows the logic circuits using Boolean algebra as a tool for analysis and design of digital systems.In this laboratory study the logic gates, which are the fundamental logic circuits, and observe how their operation can be described using Boolean algebra. Index— I. Nomenclature. II. Introduction. III. Preparation of technical work. A. Objective. B. Theoretical basis. C. Development. D. Conclusions. IV. References.

For the laboratory use various forms of interpretation and the circuital andsimulations were done with NI-Multisim.
III. PREPARATION OF TECHNICAL W ORK. A. Target practice. The student must apply different types of digital gates and observe the output response. Observe the behavior of the gates, as well as verify their truth table of each. B. Theoretical basis. *The AND gate is so named because, if 0 is called "false" and 1 is called "true," the gate acts in the same wayas the logical "and" operator. The following illustration and table show the circuit symbol and logic combinations for an AND gate. (In the symbol, the input terminals are at left and the output terminal is at right.) The output is "true" when both inputs are "true." Otherwise, the output is "false." 1) Reference: 74LS08.

I. NOMENCLATURE. Logical gates. A logic gate is an elementary buildingblock of a digital circuit . Most logic gates have two inputs and one output. At any given moment, every terminal is in one of the two binary conditions low (0) or high (1), represented by different voltage levels. The logic state of a terminal can, and generally does, change often, as the circuit processes data. In most logic gates, the low state is approximately zero volts (0 V), while the highstate is approximately five volts positive (+5 V). II. INTRODUCTION In digital electronics, there are a number of problems and unknowns to solve that normally arise. It is very common when designing a digital electronic circuit or need to have the opposite value of a point, or when a certain number of buttons are activated, an output remains off. All these situations can be expressed by zeros andones, and treated by digital circuits. The basic elements of any digital circuit are logic gates.

True table.

*The OR gate gets its name from the fact that it behaves after the fashion of the logical inclusive "or." The output is "true" if either or both of the inputs are "true." If both inputs are "false," then the output is "false." 2) Reference: 74LS32.

Boolean algebra provides a set ofassumptions and operations aimed at solving processes to run, obtaining a set of equations that must be translated and performed by mechanical, electrical or electronic. In the lab trying to understand the function and performance of the logic gates and Boolean algebra when they are stimulated with voltage.

True table.

True table. *A logical inverter, sometimes called a NOT gate todifferentiate it from other types of electronic inverter devices, has only one input. It reverses the logic state. 3) Reference: 74LS04.

* The XOR (exclusive-OR) gate acts in the same way as the logical "either/or." The output is "true" if either, but not both, of the inputs are "true." The output is "false" if both inputs are "false" or if both inputs are "true." Another way of looking at this...