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Arduino Uno R3 Original

Arduino Uno R3 Original

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Arduino UNO R3 Original The Arduino Uno R3 is a microcontroller board based on the ATmega328P chip . This board has 14 digital I/O pins (6 support PWM), 6 analog inputs , a 16 MHz crystal resonator , a USB connector, a power jack, an ICSP header, and a reset button. You may quickly charge it with a USB cable, adapter, or battery. The Uno R3 is designed for both students and enthusiasts and makes electronics and coding accessible without requiring extensive technical knowledge. This Arduino UNO microcontroller board can be programmed using the Arduino IDE , which allows users …
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Arduino UNO R3 Original The Arduino Uno R3 is a microcontroller board based on the ATmega328P chip . This board has 14 digital I/O pins (6 support PWM), 6 analog inputs , a 16 MHz crystal resonator , a USB connector, a power jack, an ICSP header, and a reset button. You may quickly charge it with a USB cable, adapter, or battery. The Uno R3 is designed for both students and enthusiasts and makes electronics and coding accessible without requiring extensive technical knowledge. This Arduino UNO microcontroller board can be programmed using the Arduino IDE , which allows users to build sketches (code) that control the board. Even if something goes wrong, simply change the chip and restart. "Uno" means "one" in Italian, and it marks the release of the Arduino IDE 1.0. It became the standard and reference model for subsequent Arduino boards. Common uses of the Arduino Uno board include home automation, industrial control, and DIY electronics projects. It can also interface with other Arduino boards or Raspberry Pi, making it a flexible choice for creators and students. Check out the original Arduino UNO R4 WiFi ! Read our blog IR sensor Arduino code for interfacing IR sensor module with Arduino. Browse the best collection of original Arduino products. Key Features ATmega328P microcontroller ensures reliable and efficient performance Includes 14 digital input/output pins, with 6 supporting PWM output Features 6 analog input pins for reading sensor or variable data Equipped with a 16 MHz ceramic resonator for stable timing Offers 32 KB flash memory (0.5 KB used by bootloader), 2 KB SRAM, and 1 KB EEPROM Can be powered via USB, DC adapter (7–12V recommended), or battery Integrated USB-to-serial communication using ATmega16U2 for easy programming Built-in resettable polyfuse provides protection against USB overcurrent Supports automatic reset for quick and easy code uploads Includes an onboard LED on digital pin 13 for basic testing Supports serial (UART), SPI, and I2C communication protocols Compatible with a wide range of Arduino shields for project expansion Easy to use, making it perfect for beginners and DIY electronics enthusiasts Arduino UNO Pin Diagram The power pins are as follows: Pin Description Vin The input voltage to the Arduino board when using an external power source (7–12V). You can supply voltage through this pin, or access it if supplying voltage via the DC power jack. 5V Outputs a regulated 5V from the onboard regulator. Power can come from the USB, DC jack, or Vin pin. Do not supply power to this pin directly , as it bypasses the regulator. 3.3V Outputs 3.3 volts generated by the onboard regulator. Maximum current draw is 50 mA. GND Ground pins used to complete the circuit. Multiple GND pins are available. IOREF Provides the voltage reference at which the microcontroller operates. Shields can use this pin to adapt to the board’s voltage (5V or 3.3V). Explore a wide range of Original Arduino Boards on Iotcart. Why Choose Arduino Uno R3? Beginner-friendly: Easy to use with a simple IDE and beginner-level coding language. Strong community support: Large global community, tutorials, and troubleshooting help available. Wide ecosystem: Compatible with various shields, sensors, and components. Affordable: Budget-friendly option for students, hobbyists, and beginners. Highly versatile: Ideal for projects from basic LED control to complex IoT systems. Reliable starting point: Best entry-level board before exploring advanced Arduino models. Open-source platform: Hardware and software are fully open-source, allowing customization and innovation. Stable performance: Offers consistent and reliable operation for long-term learning and prototyping. Arduino Nano vs Uno Comparison Table Feature Arduino UNO R3 (Original) Arduino Nano (Original) Price (Iotcart) ?1,860 ?1,798 VIEW Microcontroller ATmega328P ATmega328P Operating Voltage 5V 5V Input Voltage 7-12V 7-12V Digital I/O Pins 14 (6 PWM) 14 (6 PWM) Analog Input Pins 6 8 Clock Speed 16 MHz 16 MHz Flash Memory 32 KB (0.5 KB used by bootloader) 32 KB (0.5 KB used by bootloader) SRAM 2 KB 2 KB EEPROM 1 KB 1 KB USB Interface Standard USB Type-B Mini USB Size Larger (approx. 68.6mm x 53.4mm) Compact (approx. 45mm x 18mm) Best for Beginners, shields, projects needing standard size Compact projects, breadboard-friendly applications Wireless Capability Needs external module (e.g., ESP8266, HC-05) Needs external module (e.g., ESP8266, HC-05) Expandable with Shields Yes, compatible with multiple shields Limited due to size constraints Project Ideas with Arduino Uno R3 LED Blinking Project Temperature & Humidity Monitor Smart Home Automation Obstacle-Avoiding Robot Automatic Plant Watering System Digital Thermometer Motion Detector Alarm IoT Weather Station RFID Door Lock System Line Follower Robot Smart Parking System Bluetooth-Controlled Car Light Follower Robot Heart Rate Monitor Home Security System Know How to Install Arduino IDE on Windows, Mac & Linux - Click HERE !

  • ATmega328P microcontroller with 16 MHz clock speed
  • 14 digital I/O pins (6 PWM), 6 analog inputs
  • 32 KB flash memory, 2 KB SRAM, 1 KB EEPROM
  • Powered via USB, DC adapter (7–12V), or battery
  • Compatible with Arduino IDE, shields, and sensors
  • Supports UART, SPI, and I2C communication protocols
  • Beginner-friendly with strong community support
  • Beginner-friendly design for learning and prototyping
  • Integrated USB-to-serial converter (ATmega16U2)
  • Resettable polyfuse for USB overcurrent protection
  • Automatic reset during code upload
  • Onboard LED on digital pin 13
  • Supports a wide range of Arduino shields
  • Open-source hardware and software
  • Ideal for DIY electronics, IoT, and robotics
Arduino Model Uno R3
Microcontroller ATmega328
Operating Voltage 5V
Supply Voltage (recommended) 7-12V
Maximum supply voltage 20V
Digital I/O Pins 14 (of which 6 provide PWM output)
Analog Input Pins 6
DC Current per I/O Pin 40mA
DC Current for 3.3V Pin 50mA
Flash Memory 32 KB of which 0.5 KB is used by the bootloader
SRAM 2KB
EEPROM 1KB
Clock Speed 16MHz
What is the microcontroller used in Arduino Uno R3?

The Arduino Uno R3 uses the ATmega328P microcontroller with a 16 MHz clock speed.

Can I power the Arduino Uno R3 with a battery?

Yes, it can be powered via USB, DC adapter (7–12V), or external battery through the Vin pin.

Is the Arduino Uno R3 compatible with shields?

Yes, it supports a wide range of Arduino shields for expanding functionality.

What programming environment does the Arduino Uno R3 use?

It is programmed using the Arduino IDE, which supports C/C++ based sketches.

How many PWM pins does the Arduino Uno R3 have?

It has 6 PWM-capable digital pins (pins 3, 5, 6, 9, 10, and 11).

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About Arduino Uno R3 Original by Arduino

Shop Arduino Uno R3 Original board. Compatible with Arduino IDE, shields & sensors. Ideal for DIY, learning & prototyping. Fast shipping in India.

Categorised under: Basic ComponentsDevelopment BoardsSensorsArduinoCompatible with ArduinoArduino Original BoardsArduino ShieldsIndustrialIOT & Wireless BoardsBoards Compatible with ArduinoElectronic Modules

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7Semi BME680 Temperature, Humidity, Pressure & Air Quality Sensor Breakout with Qwiic Interface The 7Semi BME680 Environmental Sensor Breakout is a compact yet powerful module designed for applications that require accurate measurement of temperature, humidity, pressure, and indoor air quality. Built around the trusted Bosch BME680 sensor, it provides dependable multi-parameter environmental data in real time, making it ideal for IoT projects, smart home automation systems, and portable environmental monitoring devices. Its efficient gas sensor intelligently detects VOC levels, helping you assess indoor air quality with ease. Engineered for universal compatibility, this breakout includes both a voltage regulator and level shifter, enabling seamless integration with 3.3V and 5V microcontroller platforms such as Arduino and Raspberry Pi. The Qwiic connector and I2C/SPI support ensure quick setup without messy wiring, while its compact size makes it perfect for wearables and space-constrained builds. With low-power operation, stable readings, and selectable I2C addresses, this module provides developers with a simple and reliable way to enhance environmental sensing in modern embedded projects. Features: Provides accurate measurement of temperature, humidity, pressure, and VOC-based air quality, making it an all-in-one environmental sensor solution. Supports I2C and SPI communication, ensuring smooth integration with Raspberry Pi, Arduino, ESP32, and other development boards. Includes selectable I2C addresses (0x76/0x77) to allow multiple sensors on a single bus without conflicts. Features a built-in voltage regulator and level shifting circuitry, allowing safe use with both 3.3V and 5V systems. Designed with low power consumption, suitable for long-term, battery-powered, or portable applications. Comes in a compact 19×19 mm breakout form factor, perfect for handheld devices, IoT wearables, and mini weather stations. Provides stable VOC readings after a short burn-in time, ensuring reliable indoor air quality measurements.
₹1075.19  
Backorder Available In Store Pickup Same Day Shipping
₹2098.60
Incl. GST (No Hidden Charges)
7Semi BMI270 16-bit IMU Break…
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7Semi IMU BMI270 Accelerometer & Gyroscope Breakout - STEMMA QT / Qwiic Compatible The 7Semi IMU BMI270 Accelerometer and Gyroscope Breakout is a high-performance motion-sensing module built around Bosch Sensortec’s powerful BMI270 IMU. Designed for next-generation wearable devices, robotics projects, and motion-tracking applications, this sensor delivers exceptional accuracy, ultra-low power consumption, and industry-leading self-calibrating gyroscope technology. With features like motionless CRT (Component ReTrimming), it automatically compensates for soldering drift, ensuring reliable long-term performance with minimal sensitivity error. STEMMA QT / Qwiic connectors, integrating the BMI270 into your microcontroller or IoT system is effortless, no soldering, no hassle. This breakout also supports advanced gesture recognition, activity detection, step counting, and context awareness, making it ideal for smart wearables, VR projects, and embedded motion-tracking solutions. Whether you’re building smart eyewear, intelligent shoes, robotics platforms, or fitness devices, the BMI270 ensures smooth, precise, and real-time inertial data. Features: Supports 3.3V and 5V operation for compatibility with a wide range of microcontrollers. Includes a 16-bit 3-axis accelerometer with selectable ±2g/4g/8g/16g ranges for flexible performance. Equipped with a 16-bit 3-axis gyroscope supporting ±125 to ±2000 dps for accurate angular sensing. Features Bosch’s self-calibrating gyroscope (CRT) to eliminate post-soldering drift and maintain precision. Supports rich motion and gesture detection, including step counting, activity recognition, wrist flick, any-motion, no-motion, and more. STEMMA QT / Qwiic interface provides plug-and-play connectivity for easy prototyping and integration. Ideal for wearables, robotics, AR/VR systems, motion tracking, smart textiles, and IoT devices. BMI270 Accelerometer and Gyroscope Breakout Dimensions: BMI270 Accelerometer and Gyroscope Breakout Pinout: BMI270 Breakout Arduino Connection:
₹516.70  
Backorder Available In Store Pickup Same Day Shipping
₹698.60
Incl. GST (No Hidden Charges)

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