Virtual Labs

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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Interfacing of Analog Sensors

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What is the primary function of the LM35 temperature sensor?

a: To detect motion Explanation

Explanation

b: To measure and output voltage directly Explanation

Explanation

c: To measure humidity Explanation

Explanation

d: To provide a voltage output directly proportional to the temperature in Celsius Explanation

Explanation

What is the role of the 220Ω resistor in the LED circuit?

a: To protect the Arduino from the LED Explanation

Explanation

b: To ensure the LED is at a known voltage Explanation

Explanation

c: To limit the current flowing to the LED, preventing it from burning out. Explanation

Explanation

d: To increase the brightness of the LED Explanation

Explanation

Why is a relay used to control the 12V DC motor in this project?

a: To change the motor's direction Explanation

Explanation

b: To convert the Arduino's digital signal to an analog signal Explanation

Explanation

c: To safely switch the motor's high voltage and current with the Arduino's low-power signal. Explanation

Explanation

d: To provide power to the Arduino board Explanation

Explanation

Which type of pin on the Arduino Uno is the LM35 sensor's output (Vout) connected to?

a: A digital I/O pin Explanation

Explanation

b: An analog input pin Explanation

Explanation

c: A power pin (5V) Explanation

Explanation

d: The GND pin Explanation

Explanation

What is the role of the NPN transistor in this project?

a: To regulate the voltage for the Arduino Explanation

Explanation

b: To act as a current amplifier or switch, controlled by the Arduino Explanation

Explanation

c: To convert the sensor's analog signal to a digital one Explanation

Explanation

d: To amplify the temperature reading from the sensor Explanation

Explanation

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