Virtual Labs

I/O Programming -- Interfacing of LED and Switch

What is the purpose of the push button in this project?

a: To provide power to the LED Explanation

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b: To control the blinking frequency of the LED Explanation

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c: To turn the LED on and off Explanation

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d: None of the above Explanation

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What is the role of the pull-up resistor in this project?

a: To keep the input pin at a known HIGH state when the button is not pressed Explanation

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b: To debounce the push button Explanation

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c: To provide a path to ground for the LED Explanation

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d: To limit the current through the LED Explanation

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How did you determine the appropriate value for the pull-up resistor?

a: By trial and error Explanation

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b: By consulting the datasheet for the microcontroller Explanation

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c: By measuring the voltage across the resistor Explanation

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d: None of the above Explanation

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What debouncing technique did you use in this project?

a: Software debouncing Explanation

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b: Hardware debouncing Explanation

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c: Both A and B Explanation

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d: None of the above Explanation

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What is the purpose of the delay function in this project?

a: To ensure that the LED blinks at a steady frequency Explanation

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b: To prevent the microcontroller from overheating Explanation

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c: To provide a delay between pressing the push button and activating the LED Explanation

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d: None of the above Explanation

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How would you modify the code to increase the blinking frequency of the LED?

a: Increase the value of the delay function Explanation

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b: Decrease the value of the delay function Explanation

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c: Modify the code that reads the push button input Explanation

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d: None of the above Explanation

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What is the purpose of the resistor in series with the LED?

a: To protect the microcontroller from overvoltage Explanation

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b: To provide a path to ground for the LED Explanation

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c: To limit the current through the LED Explanation

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d: None of the above Explanation

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What challenges did you face during this project, and how did you overcome them?

a: Poor contact between the push button and the breadboard, solved by checking and fixing the wiring Explanation

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b: Incorrectly calculating resistor values, solved by referring to the datasheet and online resources Explanation

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c: Both A and B Explanation

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d: None of the above Explanation

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What is the main advantage of using a microcontroller to control the LED blinking?

a: Precise control over the blinking frequency Explanation

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b: More reliable than using discrete components Explanation

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c: Can easily be reprogrammed for different applications Explanation

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d: All of the above Explanation

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How could you modify the circuit to control multiple LEDs with the push button?

a: Use a larger resistor in series with the LEDs Explanation

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b: Use a shift register or multiplexer to control the LEDs Explanation

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c: Add more push buttons to the circuit Explanation

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d: None of the above Explanation

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