(TIỂU LUẬN) CIRCUIT DESIGN COLLECTS ENVIRONMENTAL PARAMETERS LCD DISPLAY

HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION FACULTY FOR HIGH QUALITY TRAINING PROJECT CIRCUIT DESIGN COLLECTS ENVIRONMENTAL PARAMETERS LCD DISPLAY Student 1: TRAN QUOC TRUNG Student ID: 17141032 Major: ELECTRIC& TELECOMMUNICATION Student 1: DO THI THAO Student ID: 17141026 Major: ELECTRIC& TELECOMMUNICATION Advisor: DO DUY TAN, PhD Ho Chi Minh City, June 2020 HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION FACULTY FOR HIGH QUALITY TRAINING PROJECT CIRCUIT DESIGN COLLECTS ENVIRONMENTAL PARAMETERS LCD DISPLAY Student 1: TRAN QUOC TRUNG Student ID: 17141032 Major: ELECTRIC& TELECOMMUNICATION Student 1: DO THI THAO Student ID: 17141026 Major: ELECTRIC& TELECOMMUNICATION Advisor: DO DUY TAN, PhD Ho Chi Minh City, June 2020 THE SOCIALIST REPUBLIC OF VIETNAM Independence – Freedom– Happiness Ho Chi Minh City, January 20, 2020 PROJECT ASSIGNMENT Student name: _Trần Quốc Trung _ Student ID: 17141032 _ Student name: _Đỗ Thị Thảo _ Student ID: 17141026 _ Student name: Student ID: _ Major: Electronic & Telecommunication _ Class: 1714CLA _ Advisor: Ph.D Đỗ Duy Tân Phone number: _0327371637 _ Date of assignment: _ Date of submission: _ Project title: CIRCUIT DESIGN GATHER OF ENVIRONMENTAL PARAMETERS – LCD DISPLAY _ Initial materials provided by the advisor: _ Content of the project: _ Research major applications of sensors and circuits Thereby building systems of application of works in life and industry Final product: _The divice to collect and display temperature and humidity CHAIR OF THE PROGRAM ADVISOR (Sign with full name) (Sign with full name) THE SOCIALIST REPUBLIC OF VIETNAM Independence – Freedom– Happiness Ho Chi Minh City, January 20, 2020 ADVISOR’S EVALUATION SHEET Student name: Student ID: Student name: Student ID: Student name: Student ID: Major: Project title: Advisor: EVALUATION Content of the project: 2.Strengths: 3.Weaknesses: Approval for oral defense? (Approved or denied) Overall evaluation: (Excellent, Good, Fair, Poor) Mark:……………….(in words: ) Ho Chi Minh City, month day, year ADVISOR (Sign with full name) THE SOCIALIST REPUBLIC OF VIETNAM Independence – Freedom– Happiness Ho Chi Minh City, January 20, 2020 PRE-DEFENSE EVALUATION SHEET Student name: Student ID: Student name: Student ID: Student name: Student ID: Major: Project title: Name of Reviewer: EVALUATION Content and workload of the project Strengths: Weaknesses: Approval for oral defense? (Approved or denied) Overall evaluation: (Excellent, Good, Fair, Poor) Mark:……………….(in words: ) Ho Chi Minh City, month day, year REVIEWER (Sign with full name) THE SOCIALIST REPUBLIC OF VIETNAM Independence – Freedom– Happiness EVALUATION SHEET OF DEFENSE COMMITTEE MEMBER Student name: Student ID: Student name: Student ID: Student name: Student ID: Major: Project title: Name of Defense Committee Member: EVALUATION Content and workload of the project Strengths: Weaknesses: Overall evaluation: (Excellent, Good, Fair, Poor) Mark:……………….(in words: ) Ho Chi Minh City, month day, year COMMITTEE MEMBER (Sign with full name) Name of project: CIRCUIT DESIGN COLLECTS ENVIRONMENTAL PARAMETERS LCD DISPLAY Instructor: Ph.D ĐỖ DUY TÂN Student 1: ĐỖ THỊ THẢO Student’s ID: 17141026 Class: 17141CLA2 Email: 17141026@student.hcmute.edu.vn Student 2: TRẦN QUỐC TRUNG Student’s ID: 17141032 Class: 17141CLA1 Email: 17141032@student>hcmute.edu.vn Figure 2.2: The detailed diagram of Arduino Uno R3 (tapit.vn) 2.2 Introducing DHT11 temperature and humidity sensor DHT11 is a very common temperature and humidity sensor today The sensor has a built-in signal preprocessor that helps data get accurate without having to go through any calculations DHT11 sensor consists of power pins, and signal pin Figure 2.3: DHT11 sensor (arduinokit.vn)  Pin out - VCC: Power Supply 3.5V to 5.5V - GND: Connected to the ground of the circuit - DATA: Outputs both Temperature and Humidity through serial Data Operating voltage Operating humidity range Operating temperature range Maximum sampling frequency Maximum transmission distance 3V - 5V (DC) 20% - 90% RH, error ±5%RH 0°C ~ 50°C, error ±2°C Hz 20m Table 2.2: Specification of DHT11 sensor 2.3 Overview of I2C communication I2C is the abbreviation of the English phrase "Inter-Integrated Circuit" It is a communication protocol developed by Philips Semiconductors to transfer data between a central processor and multiple ICs on the same circuit board using only two signal paths I2C interface uses wires to connect is SCL (Serial Clock) and SDA (Serial Data) In particular, SCL wire is used to synchronize between devices when transmitting data, while SDA is the data transmission wire Because of its simplicity, this type of protocol is widely used for communication between microcontrollers and sensor arrays, display devices, IoT devices, EEPROMs, etc This is a type of synchronous serial communication protocol It means that data bits are transmitted bit by bit at regular intervals set by a reference clock signal Figure 2.4: I2C communication (arduinokit.vn) Figure 2.5 The detailed diagram of Communication I2C (academia.edu) 2.4 Overview of LCD 16×2 16×2 LCD display device (Liquid Crystal Display) is used in many microcontroller applications LCD 16×2 has many advantages compared to other types of display such as: the ability to display diverse characters (letters, numbers, graphic characters); Easy to put into the application circuit according to various communication protocols, consuming very little system resources, low cost, Figure 2.6: LCD 16×2 (arduinokit.vn) Voltage MAX Voltage MIN Stable operation: 2.7-5.5V High output voltage Low output voltage Power supply current Operating temperature 7V -0.3V 2.7-5.5V > 2.4V