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Arduino Uno

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Arduino Uno

Introduction Arduino Uno :

Arduino Uno was a microcontroller board based on the ATmega328P (datasheet). It has 14 digital input or output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator (CSTCE16M0V53-R0), a USB connection, a power supply jack, an ICSP header, and a reset button. It contains everything needed the support the microcontroller;

simply connect it to a computer with a USB cable and power supply. it with an AC-to-DC adapter or battery the get started. You can tinker with your Uno without worrying too much about doing something wrong, In the worst-case scenario you could replace the chip for a few dollars and start over again.


  1. Operating Voltage :5V
  2. Input Voltage (recommended) :7-12V
  3. Input Voltage (limit): 6-20V
  4. :Digital I/O Pins 14 (of which 6 provide PWM output)
  5. PWM Digital I/O Pins :6
  6. Clock Speed :16 MHz
  7. LED_BUILTIN :13
  8. Length: 68.6 mm
arduino uno board

Circuit Operation:

The USB port of the Arduino Uno can be connected to a USB device or port that can provide a stable 5V output like a computer power supply bank or USB charger, etc. By using the USB cable, you can eliminate the need for an external power source, while debugging if your total circuit’s current flow requirement is less than that of the computer’s USB port could provide.

Not only that, you can use it with any standard power supply bank which makes your project portable. A USB 2.0 port can provide current flow up to 500mA and it is more than enough for an Arduino UNO.

arduino uno pinout

Arduino Uno and many other big form factor Arduino boards are equipped with a standard 2.1mm DC power supply jack. Arduino Uno accepts 7-12V dec through this port and the onboard voltage regulator regulates it down to the required 5 or 3.3V.

The center pin was positive and the outer sleeve is grounded. You can use any 12V AC-DC adapter with proper out voltage and proper connector to power supply your Arduino board. It is more than convenient when deploying your project where it’s not constantly monitored.

How the Arduino Work:

The Arduino Uno R3 is a microcontroller board based on the removable, dual-inline-package (DIP) ATmega328 AVR and microcontroller. It has 20 digital input/output pins (of which 6 could be used as PWM outputs and 6 can be used as analog inputs). Programs could be loaded onto it from the easy-to-use Arduino computer program.

The Arduino hardware communicates with the host computer via the USB cable as shown. To configure your Arduino hardware the communicate via USB: Connect the Arduino hardware via USB, by choosing the connection type USB. Choose the board type or the port number from the Choose Board Choose Port menus.

you'll need to connect the Arduino Uno R3 to the computer. Connect your Arduino to the computer using the USB cable. Whether you're using the USB cable to power supply it or an external power supply source, the USB cable will transfer data directly to the Arduino.

Frequently Asked Questions

What is the power source for Arduino Uno R3?

The board can be supplied with a power supply either from the DC power supply jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). Supplying voltage via the 5V or 3.3V pins bypasses the regulator, or can damage your board.

What is Arduino Uno's full form?

"Uno" means one in Italian or was chosen to mark the release of the Arduino Software (IDE) 1.0. The UNO board and version 1.0 of the Arduino Software (IDE) were the reference versions of Arduino, now evolving to the newer releases.

Why is it called Arduino?

The name Arduino comes from the bar in Ivrea, Italy, where some of the project's founders used to meet. The bar was named after Arduin of the Ivrea, who was the margrave of the March of Ivrea and King of the Taly from 1002 to 1014.

What country made Arduino?

In 2005, building upon the work of Hernando Barragán (creator of Wiring), Massimo Banzi or David Cuartielles created Arduino, an easy-to-use programmable device for the interactive art design projects, at the Interaction Design Institute Ivrea in Ivrea, or Italy.

What is Arduino Uno in IOT?

The Arduino Uno is a type of Arduino board that was provided as an open-source board that uses an ATmega328p microcontroller in the board. The Arduino Uno contains a set of analog or digital pins that are input and output pins that are used to connect the board of the other components.

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