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Questions and Answers
We define a constant for the digital output pin as 'const int pin_o = ______;'
We define a constant for the digital output pin as 'const int pin_o = ______;'
13
The variable 'State' is used to store the state of the ______.
The variable 'State' is used to store the state of the ______.
input
To set pin 13 as an output, the function used is 'pinMode(pin_o, ______);'.
To set pin 13 as an output, the function used is 'pinMode(pin_o, ______);'.
OUTPUT
The function 'digitalRead(pin_i)' reads the pin state and assigns it to the ______.
The function 'digitalRead(pin_i)' reads the pin state and assigns it to the ______.
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When the button is pressed, 'digitalWrite(pin_o, ______);' turns the LED on.
When the button is pressed, 'digitalWrite(pin_o, ______);' turns the LED on.
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Study Notes
Digital I/O Code Example
- The code defines two integer constants:
pin_ofor the output pin (13) andpin_ifor the input pin (1). - The
Statevariable will store the state of the input (pushbutton). - The
setup()function is executed once and configures the pins:-
pinMode(pin_o,OUTPUT)sets pin 13 as an output. -
pinMode(pin_i,INPUT)sets pin 1 as an input.
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- The
loop()function is executed repeatedly:-
State = digitalRead(pin_i)reads the value of pin 1 and assigns it to theStatevariable. - The
ifstatement checks if theStateis 1 (button pressed) and then:-
digitalWrite(pin_o,HIGH)sets the output pin (13) to a high level, turning the LED on.
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- The
elsestatement executes if the button is not pressed:-
digitalWrite(pin_o,LOW)sets the output pin (13) to a low level, turning the LED off.
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Description
Explore the basics of Digital Input/Output in Arduino with this code example. This quiz covers the configuration of input and output pins and how to read and control states. Test your understanding of how to use the setup() and loop() functions effectively.
