Podcast
Questions and Answers
What does 'LM' stand for in LM35 temperature sensor?
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?
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?
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?
Which of the following statements is true about the RGB LED?
What technique does PWM utilize to control LED brightness?
What technique does PWM utilize to control LED brightness?
Why is the close placement of RGB diodes important?
Why is the close placement of RGB diodes important?
What does the function analogWrite() do in controlling the RGB LED?
What does the function analogWrite() do in controlling the RGB LED?
Which pin on the LM35 is used for Analog Output?
Which pin on the LM35 is used for Analog Output?
What happens to the current and voltage when resistance increases in a circuit?
What happens to the current and voltage when resistance increases in a circuit?
Which type of light must shine on an extrinsic resistor to activate it?
Which type of light must shine on an extrinsic resistor to activate it?
What can be inferred when the analogRead() function returns a low value from a photoresistor?
What can be inferred when the analogRead() function returns a low value from a photoresistor?
What is the primary function of an electronic visual display?
What is the primary function of an electronic visual display?
What material does an electroluminescent display use to emit light?
What material does an electroluminescent display use to emit light?
In an Arduino environment, what is the purpose of using lcd.setCursor(column, row)?
In an Arduino environment, what is the purpose of using lcd.setCursor(column, row)?
Which type of display utilizes tiny light-emitting diodes?
Which type of display utilizes tiny light-emitting diodes?
How does a photoresistor respond to intense light exposure?
How does a photoresistor respond to intense light exposure?
Which sensor is primarily used for detecting acceleration forces such as gravity?
Which sensor is primarily used for detecting acceleration forces such as gravity?
What is the main use of the DS18B20 sensor?
What is the main use of the DS18B20 sensor?
What is the primary reason for not using digitalWrite() with an RGB LED?
What is the primary reason for not using digitalWrite() with an RGB LED?
What is the primary advantage of using an LED display?
What is the primary advantage of using an LED display?
Which terminal of a potentiometer is referred to as the NEGATIVE terminal?
Which terminal of a potentiometer is referred to as the NEGATIVE terminal?
Which sensor is ideal for monitoring body temperature?
Which sensor is ideal for monitoring body temperature?
In what application would you primarily use DHT11/DHT22 sensors?
In what application would you primarily use DHT11/DHT22 sensors?
Which of the following displays is known for consuming very little power?
Which of the following displays is known for consuming very little power?
What happens to the resistance of a photoresistor when the light intensity is high?
What happens to the resistance of a photoresistor when the light intensity is high?
What type of sensor is the PT100 and what is its primary application?
What type of sensor is the PT100 and what is its primary application?
How is the output voltage of a potentiometer affected?
How is the output voltage of a potentiometer affected?
What characteristic of Quantum Dot Displays improves their effectiveness?
What characteristic of Quantum Dot Displays improves their effectiveness?
Which of the following sensors is used to measure extreme temperatures in tough environments?
Which of the following sensors is used to measure extreme temperatures in tough environments?
Flexible displays are primarily designed for which of the following applications?
Flexible displays are primarily designed for which of the following applications?
What is the main function of a potentiometer?
What is the main function of a potentiometer?
In what way does the wiper of a potentiometer function?
In what way does the wiper of a potentiometer function?
What is the role of the SDA pin in an I2C LCD setup?
What is the role of the SDA pin in an I2C LCD setup?
What does the analogReference() function do in the given program code?
What does the analogReference() function do in the given program code?
Which temperature sensor is considered simple and easy-to-use for basic temperature measurements?
Which temperature sensor is considered simple and easy-to-use for basic temperature measurements?
Which I2C pin is responsible for timing signals?
Which I2C pin is responsible for timing signals?
What does a voltage divider circuit accomplish?
What does a voltage divider circuit accomplish?
What is displayed on the first line of the LCD in the sample program?
What is displayed on the first line of the LCD in the sample program?
What is true about an intrinsic resistor?
What is true about an intrinsic resistor?
Which statement is true regarding the overall goal of the message in the program?
Which statement is true regarding the overall goal of the message in the program?
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 withtemp = 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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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.
