Arduino Basics for Beginners

What is the basic code to make an LED blink on Arduino?

• void setup() { pinMode(LED_BUILTIN, OUTPUT); } void loop() { digitalWrite(LED_BUILTIN, HIGH); }

• void setup() { pinMode(LED_BUILTIN, OUTPUT); } void loop() { digitalWrite(LED_BUILTIN, HIGH); delay(1000); digitalWrite(LED_BUILTIN, LOW); delay(1000); }

• void setup() { pinMode(LED_BUILTIN, OUTPUT); } void loop() { delay(1000); }

• void setup() { pinMode(LED_BUILTIN, INPUT); } void loop() { digitalWrite(LED_BUILTIN, LOW); delay(500); }

How do you control the delay of an LED blinking in Arduino?

• Connect a potentiometer to vary the blinking delay.

• Adjust the LED brightness to change the blinking rate.

• Use the 'delay(milliseconds)' function to set the blinking interval.

• Use the 'setInterval(milliseconds)' function to control the blinking speed.

What is the purpose of the setup() function in an Arduino sketch?

• The setup() function is for defining custom libraries.

• The setup() function is used to read sensor data.

• The setup() function runs the main loop of the program.

• The setup() function initializes the Arduino environment.

How do you connect an LED to an Arduino board?

• Connect the LED directly to the power supply without a resistor.

• Connect the anode of the LED to a digital pin and the cathode to ground through a resistor.

• Connect both the anode and cathode of the LED to the same digital pin.

• Connect the cathode of the LED to a digital pin and the anode to ground.

What is the syntax to create a variable in Arduino C++?

• dataType variableName = initialValue;

• variableName = dataType initialValue;

• dataType = variableName initialValue;

• initialValue variableName: dataType;

How do you read the state of a button in Arduino?

• Set pinMode(pinNumber, OUTPUT) before reading the button.

• Use analogRead(pinNumber) to check the button state.

• Use digitalRead(pinNumber) after setting pinMode(pinNumber, INPUT).

• Read the button state using readButton(pinNumber).

What is the function of the loop() in an Arduino program?

• The loop() function runs only once at the start of the program.

• The loop() function initializes the Arduino hardware.

• The loop() function runs continuously to execute the main code of an Arduino program.

• The loop() function is used to define the setup of the program.

How can you use an if statement to check if a button is pressed?

• if (button.clicked) { // perform action }

• if (button.isActive) { // perform action }

• if (button.pressed == true) { // perform action }

• if (button.isPressed) { // perform action }

What is the default state of a digital pin in Arduino?

• Always high

• Pulled down to ground

• Floating (high-impedance state)

• Always low

How do you turn an LED on and off using a button?

• Connect an LED in series with a button to control its on/off state.

• Use a resistor to turn the LED on and off.

• Connect an LED directly to a power source without a button.

• Connect the LED in parallel with the button.