Stage 2

Inputs

digitalRead(), if statements

Stage 2 teaches inputs and decisions. Your Arduino can read buttons and switches with digitalRead(), then use if statements to choose what to do. You will build games, timers, and alarms.

Skills you will learn

  • Reading inputs with digitalRead()
  • Making decisions with if statements
  • Buttons, switches, and buzzers
  • Games and reaction timers

Stage 2 turns your Arduino from a light show into an interactive gadget that responds to you!

10 projects in this stage

Push Button LED11

Push Button LED

digitalRead() reads an input pin

Push Button Buzzer12

Push Button Buzzer

if statement branches output

Security Switch13

Security Switch

switch state vs momentary button

Toggle Button14

Toggle Button

edge detection and toggle latch

Reaction Timer15

Reaction Timer

millis() with if conditions

Quiz Buzzer16

Quiz Buzzer

multiple inputs and first-wins logic

Electronic Dice17

Electronic Dice

random() triggered by a button

Simon Says18

Simon Says

sequence compare with input

Memory Game19

Memory Game

game state with if decisions

Mini Alarm20

Mini Alarm

armed and disarmed if tree

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