# Arduino explanation

## what's arduino ?

  
Arduino is an open-source electronics platform based on easy-to-use hardware and software. It consists of both physical hardware (microcontroller boards) and an integrated development environment (IDE) used for programming those boards.

![](https://cdn.hashnode.com/res/hashnode/image/upload/v1710940135786/d361f81c-3c1e-438c-acb7-6d94d6f76991.png align="center")

# Arduino hardware:

**1- Microcontroller:** the brain of an Arduino, and is the component that we load programs into. Think of it as a tiny computer, designed to execute only a specific number of things.

**2- USB port** :used to connect your Arduino board to a computer.

**3- USB to Serial chip:** it's like the translator between the coming data from arduino and between the arduino itself, when u are programing your arduino board,you should upload your code , so USB to Serial chip component translate this code to arduino board to make it understood.

**4- Digital pins:** These pins serve for both reading and writing data (input/output). They can have only two voltage levels: either 0V (low) or 5V (high).

example: For instance, when you attempt to turn an LED on or off, you are essentially outputting data, which can result in either 0V (indicating off) or 5V (indicating on).

**PWM pins:** They are a subset of digital pins with an additional capability: they can output variable voltage levels between 0V and 5V, rather than being limited to just 0V or 5V.

**5-** **Analog pins**: Analog pins on Arduino boards are versatile components that not only read varying voltage levels but can also output analog signals using Pulse Width Modulation (PWM), providing flexibility for a wide range of applications

**6-** **5V / 3.3V pins**: These pins provide stable voltage outputs of either 5 volts or 3.3 volts, respectively, which are commonly used to power external components or provide reference voltages for sensors and modules.

**7-** **GND:** Also known as ground , negative or simply - , is used to complete a circuit, where the electrical level is at 0 volt.

**8-VIN:** A pin used to supply external voltage to the board. It allows users to power the Arduino using an external power source, such as a battery or an external power adapter, providing flexibility in powering the board in various applications.