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LM35 Temperature Sensor Overview
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LM35 Temperature Sensor Overview

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Questions and Answers

What does 'LM' stand for in LM35 temperature sensor?

  • Light Module
  • Low Measurement
  • Linear Method
  • Linear Monolithic (correct)

    • What is the temperature range the LM35 can measure?

  • -55°C to 150°C (correct)
  • -50°C to 100°C
  • -40°C to 120°C
  • -60°C to 200°C

    • What is the baud rate for the LM35 temperature sensor?

  • 57600 (correct)
  • 115200
  • 9600
  • 38400

    • Which of the following statements is true about the RGB LED?

    <p>It consists of three tiny light-emitting diodes.</p> Signup and view all the answers

    What technique does PWM utilize to control LED brightness?

    <p>Pulse-Width Modulation</p> Signup and view all the answers

    Why is the close placement of RGB diodes important?

    <p>To create a seamless color mix.</p> Signup and view all the answers

    What does the function analogWrite() do in controlling the RGB LED?

    <p>Controls the brightness of the diodes.</p> Signup and view all the answers

    Which pin on the LM35 is used for Analog Output?

    <p>2nd Pin</p> Signup and view all the answers

    What happens to the current and voltage when resistance increases in a circuit?

    <p>Current decreases, voltage decreases.</p> Signup and view all the answers

    Which type of light must shine on an extrinsic resistor to activate it?

    <p>Infrared light</p> Signup and view all the answers

    What can be inferred when the analogRead() function returns a low value from a photoresistor?

    <p>The photoresistor is exposed to darkness.</p> Signup and view all the answers

    What is the primary function of an electronic visual display?

    <p>To create a permanent record of transmitted images.</p> Signup and view all the answers

    What material does an electroluminescent display use to emit light?

    <p>Electroluminescent materials</p> Signup and view all the answers

    In an Arduino environment, what is the purpose of using lcd.setCursor(column, row)?

    <p>To position the cursor for text display.</p> Signup and view all the answers

    Which type of display utilizes tiny light-emitting diodes?

    <p>LED Display</p> Signup and view all the answers

    How does a photoresistor respond to intense light exposure?

    <p>Decreases resistance and increases analog reading.</p> Signup and view all the answers

    Which sensor is primarily used for detecting acceleration forces such as gravity?

    <p>Accelerometer Sensor</p> Signup and view all the answers

    What is the main use of the DS18B20 sensor?

    <p>Digital projects needing multiple sensors</p> Signup and view all the answers

    What is the primary reason for not using digitalWrite() with an RGB LED?

    <p>It can only turn the LED fully ON or OFF.</p> Signup and view all the answers

    What is the primary advantage of using an LED display?

    <p>Brightness and durability for outdoor use</p> Signup and view all the answers

    Which terminal of a potentiometer is referred to as the NEGATIVE terminal?

    <p>Left end terminal</p> Signup and view all the answers

    Which sensor is ideal for monitoring body temperature?

    <p>NTC Thermistor</p> Signup and view all the answers

    In what application would you primarily use DHT11/DHT22 sensors?

    <p>Weather stations and greenhouse monitoring</p> Signup and view all the answers

    Which of the following displays is known for consuming very little power?

    <p>LCD Display</p> Signup and view all the answers

    What happens to the resistance of a photoresistor when the light intensity is high?

    <p>The resistance decreases.</p> Signup and view all the answers

    What type of sensor is the PT100 and what is its primary application?

    <p>High accuracy for industrial temperature monitoring</p> Signup and view all the answers

    How is the output voltage of a potentiometer affected?

    <p>By adjusting the wiper position.</p> Signup and view all the answers

    What characteristic of Quantum Dot Displays improves their effectiveness?

    <p>Enhanced light provision for color accuracy and brightness</p> Signup and view all the answers

    Which of the following sensors is used to measure extreme temperatures in tough environments?

    <p>Thermocouples</p> Signup and view all the answers

    Flexible displays are primarily designed for which of the following applications?

    <p>Creating foldable phones and e-readers</p> Signup and view all the answers

    What is the main function of a potentiometer?

    <p>To serve as a variable voltage divider.</p> Signup and view all the answers

    In what way does the wiper of a potentiometer function?

    <p>It interacts with the resistive element.</p> Signup and view all the answers

    What is the role of the SDA pin in an I2C LCD setup?

    <p>To transmit and receive data</p> Signup and view all the answers

    What does the analogReference() function do in the given program code?

    <p>Sets the reference voltage for ADC</p> Signup and view all the answers

    Which temperature sensor is considered simple and easy-to-use for basic temperature measurements?

    <p>LM35 Temperature Sensor</p> Signup and view all the answers

    Which I2C pin is responsible for timing signals?

    <p>SCL</p> Signup and view all the answers

    What does a voltage divider circuit accomplish?

    <p>Transforms large voltage to smaller voltage.</p> Signup and view all the answers

    What is displayed on the first line of the LCD in the sample program?

    <p>GOODLUCK ON YOUR</p> Signup and view all the answers

    What is true about an intrinsic resistor?

    <p>It can absorb and detect regular light.</p> Signup and view all the answers

    Which statement is true regarding the overall goal of the message in the program?

    <p>Wishing success and confidence in examinations.</p> Signup and view all the answers

    Study Notes

    LM35 Temperature Sensor

    • Measures temperature by converting it into a voltage output.
    • LM stands for "Linear Monolithic"; linear indicates direct proportionality between temperature input and voltage output.
    • Operates in temperature range of -55°C to 150°C.
    • Baud Rate set at 57600 for communication.
    • Pin configuration: first pin for VCC (5V), second for Analog Out, third for GND.

    RGB LED

    • Contains three diodes: red, green, blue, allowing for color mixing.
    • Diodes must be closely placed to create the perception of a single color.
    • Pulse-Width Modulation (PWM) controls the brightness of each diode.
    • Use analogWrite() function to adjust brightness levels for various colors.

    Types of Temperature Sensors

    • TMP36: Suitable for indoor and outdoor temperature measurement.
    • DS18B20: Used in digital projects requiring multiple sensors.
    • NTC Thermistor: Ideal for detecting temperature changes.
    • DHT11/DHT22: Measures both temperature and humidity for environmental monitoring.
    • PT100: High accuracy, used in industrial applications.
    • Thermocouples: Measure extreme temperatures in harsh environments.

    Program Code for LM35

    • analogReference(INTERNAL); initializes the reference voltage.
    • Reads temperature value using analogRead(0) and converts it with temp = temp * 0.1074;.
    • Print temperature to Serial Monitor every second.

    Potentiometer

    • Acts as a variable resistor with three terminals, adjusting output voltage based on wiper position.
    • Facilitates control over electrical signals in circuits.
    • Serves as a voltage divider to make large voltages smaller.

    Photoresistor

    • Also known as Light Dependent Resistor (LDR), reacts to light intensity.
    • Intense light results in high electric current and low resistance, while darkness increases resistance.
    • Use analogRead() to determine ambient light levels.

    Liquid Crystal Display (LCD)

    • Displays images, texts, or videos through electronic signals.
    • Types include Electroluminescent, LED, LCD, Quantum Dot, and Flexible Displays.
    • Low power consumption makes LCDs suitable for battery-operated devices.
    • Use lcd.setCursor(column, row); to position the text on the display.

    I2C 16X2 LCD Program

    • Connections:
      • GND to Arduino ground,
      • VCC to Arduino 5V,
      • SDA for data transmission,
      • SCL for timing signals.
    • Basic program initializes the display and prints messages with a delay for readability.

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    Related Documents

    MIDTERM-REVIEWER-ROBOTICS-II.pdf

    Description

    This quiz covers the fundamentals of the LM35 temperature sensor, focusing on its voltage measurement and the conversion of ADC to degrees Celsius. Learn about the linear relationship between temperature and output voltage as well as the sensor's baud rate. Test your knowledge of sensor concepts and coding.

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