🟧 PART 5 — ARDUINO UNO

What is an Arduino Uno?

The Arduino Uno is a popular microcontroller development board used by students, teachers, hobbyists and makers to create electronic projects.

What microcontroller does the Arduino Uno use?

The ATmega328P microcontroller.

Your notes say “ATmega Microcontroller”; for your test, check whether your teacher specifically expects ATmega328P.

How many bits is the Arduino Uno's ATmega microcontroller?

8-bit.

What is the “brain” of the Arduino Uno?

The ATmega microcontroller.

What is the purpose of the crystal oscillator on an Arduino Uno?

It provides the clock/timing signal needed for the microcontroller to operate.

The Arduino Uno uses a 16 MHz clock.

What does 16 MHz mean?

It means the clock operates at approximately 16 million cycles per second.

What is the purpose of the USB connector on an Arduino Uno?

It allows the Arduino to connect to a computer so that you can upload programs to it.

What is an Arduino program called?

A sketch.

What is the purpose of the power plug?

It allows the Arduino to receive power from an external power source, such as a battery or adapter.

Your notes specify:

6–20 V accepted

9 V recommended in Tinkercad

What are the digital I/O pins on the Arduino Uno?

Pins 0–13.

They can be used for digital input and output.

What are the analog input pins on the Arduino Uno?

A0–A5.

These are used to read analog signals from sensors and other devices.