Question: 1)What is meant by a button being connected active low to a digital input? Illustrate your answer by a simple circuit diagram. 2)Explain a programming

1)What is meant by a button being connected active low to a digital input? Illustrate your answer by a simple circuit diagram.

2)Explain a programming technique used to check whether an input to a microcontroller has changed the value. Write sample C-code for an Arduino Due board to wait for a button press before continuing the program. The button is connected active low to pin 8.

3) An Arduino Due board has a push-button connected active low to pin 6 and a LED connected active high on a pin (i) Write a C-code segment which turns the LED on while the button is pressed, and turns it off when the button is released. (ii) Modify your program in such a way that the LED is turned on for 10 sec when the button has been pressed.

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