Arduino LED and Button Control Quiz

LED Control

• Setting a pin to "OUTPUT" enables control over an LED, allowing it to be turned on (HIGH voltage) or off (LOW voltage) using digitalWrite(ledPin, HIGH) and digitalWrite(ledPin, LOW).

Button Input

• Configuring a pin as "INPUT" allows detection of external signals, such as a button press, which registers as HIGH when pressed and LOW when unpressed. Use digitalRead(buttonPin) to check the button state.

Delay Function

• The delay(ms) function introduces a pause in code execution, where the microcontroller remains idle, waiting for the specified duration in milliseconds.

Integer Data Type

• The int data type represents whole numbers, both positive and negative, typically used for counting, indexing, and performing arithmetic operations.

Constant Declaration

• The const keyword defines a constant, ensuring that its value cannot be changed after assignment, which helps maintain fixed values throughout the program.

For Loop Structure

• A for loop repeats a block of code a specified number of times, consisting of three components: initialization, condition, and update. It continues until the condition is false.
• Syntax example: for(initialization; condition; update) { code to be executed }.

Setup Function

• The setup() function executes once during startup or reset, used for configuring initial settings like pin modes and hardware configurations.
• Example implementation for pin initialization:

  void setup() {
      pinMode(ledPin, OUTPUT);
      pinMode(buttonPin, INPUT);
  }
  

Loop Function

• The loop() function runs continuously after setup(), executing code repeatedly until the microcontroller is powered off or reset.
• Example code demonstrating continuous operation:

  void loop() {
      digitalWrite(ledPin, HIGH); // Turns on an LED
      delay(1000); // Wait for 1 second
      digitalWrite(ledPin, LOW); // Turns off the LED
      delay(1000); // Wait again
  }
  

Pin Mode Configuration

• The pinMode(pin, mode) function sets a digital pin's mode, determining its purpose as either INPUT or OUTPUT.
• For OUTPUT: the pin provides voltage to control components like LEDs.
• For INPUT: the pin reads signals from components like buttons or sensors.

Test your knowledge on controlling LEDs and buttons using Arduino. This quiz covers the concepts of setting pins to OUTPUT and INPUT, as well as using digitalWrite to manage LED states. Perfect for beginners learning about digital signal control in electronics.