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Arduino Uno R3 compatible Board ( Pack of 25)

Arduino Uno R3 compatible Board ( Pack of 25)

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  • This UNO R3 Board is compatible with Arduino ( Pack of 25)
  • Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software
  • The Uno R3 compatible with Arduino is the latest version after the Duemilanove with an improved USB interface chip
  • Arduino can sense the environment by receiving input from a variety of sensors and can affect its surroundings by controlling lights, motors, and other actuators

Uno R3 Board compatible with Arduino

This board is based on and fully compatible with Arduino Uno R3. In addition to all the features of the previous board, the Uno R3 now uses an ATmega16U2 instead of the 8U2 found on the Uno (or the FTDI found on previous generations). This allows for faster transfer rates and more memory. No drivers are needed for Linux or Mac (info file for Windows is needed and included in the Arduino IDE), and the ability to have the Uno show up as a keyboard, mouse, joystick, etc.

The Arduino Uno R3 also adds SDA and SCL pins next to the AREF. In addition, there are two new pins placed near the RESET pin. One is the IOREF which allows the Arduino shields to adapt to the voltage provided from the board. The other is not connected and is reserved for future purposes. The Uno R3 works with all existing shields but can adapt to new shields which use these additional pins.

If you want to use this Uno R3 Board compatible with Arduino in your small or DIY projects, for that you will need few essential components like

Comparison of Arduino Uno Boards:


UNO Wifi



Microcontroller ATmega4809 ATmega328P (SMD) ATmega328P (Through hole)
USB connector Micro-USB USB-B USB-B
Digital I/O Pins 14 14 14
Analog input pins 6 6 6
PWM pins 5 6 6
UART Yes Yes Yes
I2C Yes Yes Yes
SPI Yes Yes Yes
I/O Voltage 5V 5V 5V
Input voltage (nominal) 7-12V 7-12V 7-12V
DC Current per I/O Pin 20mA 20 mA 20 mA
Power Supply Connector Barrel Plug Barrel Plug Barrel Plug
clock speed 16 MHz 16 MHz 16 MHz
USB-Serial chip ATmega16U2 CH340 ATmega16U2
SRAM 6.144KB 2KB 2KB
Flash Memory 48KB 32KB 32KB
EEPROM 256 Bytes 1KB 1KB
Dimensions 68.6 mm x 53.4 mm 68.6 mm x 53.4 mm 68.6 mm x 53.4 mm
RADIO MODULE u-blox NINA-W102 - -
Inertial Measurement Unit LSM6DS3TR (3D accelerometer) - -
LED_BUILTIN 25 13 13
Wi-Fi Microprocessor Yes - -


  • Arduino Music Instrument
  • Robot Car
  • Fingerprint door lock
  • Home Automation
  • Security systems

Package Includes:


Microcontroller  ATmega328
Input Voltage 7-12V
Operating Voltage  5V
Digital I/O Pins  14
Analog Inputs  6
Flash Memory 32K
Clock Speed 16MHz
Dimensions  5 x 4 x 3cms
Weight  25 grams

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  • Return window: 7 days from receipt unless stated
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  • Returns only for non-working/damaged products are accepted
  • Initiate return requests to our customer service team via Support ticket or contact us at +91-8123057137
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1. Which development board to buy for beginners? 

The UNO is the most popular and best-selling board as it is the best board for learning about electronics and coding. If this is your first time tinkering with the platform, the UNO is the most robust board, to begin with. This board is equipped with an ATMEGA328 microcontroller. It has standard female pin headers with 2.54 mm spacing and is compatible with various shields. 

2. Is Uno useful for beginners? 

The Uno is the most popular development board, especially for beginners just starting to build projects. This board is equipped with an ATMEGA328 microcontroller. If you can imagine any project, you can build it. 

3. What is Uno R3 Board? 

The Uno is an open-source microcontroller board based on the Microchip ATmega328P microcontroller. The board has many digital and analog input/output pins that can be used to connect to expansion boards and other circuits. 

4. What is Arduino?

Arduino is an open-source electronics platform based on easy-to-use hardware and software. Arduino boards can take inputs - such as light from a sensor, a finger on a button, or a Twitter message - and convert them to outputs - such as turning on an LED, activating a motor, or publishing anything online. 

5. Is the Uno development board useful? 

The Uno is the most widely used, particularly among beginners who are just beginning to build projects. Uno is a great tool for learning new things and discovering new interests. You can build anything you can imagine. It becomes as simple as plugging it in, programming it, and having fun.