Arduino3

What does setup() do?

• Runs repeatedly

• Runs once at start

• Stops code

How many digital I/O pins on an Arduino Uno?

• 8

• 14

• 13

How many analog inputs on an Uno?

• 6

• 8

• 13

What’s the voltage level of digital pins?

• 5V

• 3V

• 9V

digitalRead(7); returns?

• 0–1023

• HIGH or LOW

• Voltage

IR sensor is used for?

• Object detection

• distance

IR sensor has how many pins?

• 2

• 3

• 4

HC‑SR04 ultrasonic sensor function?

• Measure distance

• Measure humidity

Waves used by ultrasonic sensor?

• light

• sound

• radio

Move servo to 90°?

• servo.write(90);

• servo.attach(90);