Arduino Uno R3 with USB Cable

Overview

Arduino Uno R3 is an open-source microcontroller board based on the ATmega328P. It serves as the standard development platform for students, hobbyists, researchers, and automation engineers. Featuring 14 digital input/output pins, 6 analog inputs, an onboard 16 MHz ceramic resonator, a USB Type-B interface, a DC power jack, and ICSP headers, it provides a versatile foundation for electronic prototyping, sensor integration, robotics, and IoT projects.

Features

• Powered by the high-performance ATmega328P 8-bit AVR microcontroller
• Standard USB Type-B interface for simple plug-and-play programming and serial communication
• Onboard 5V and 3.3V linear voltage regulators for external sensor powering
• ATmega16U2 USB-to-serial converter for reliable code upload and high-speed data transmission
• Supports UART, I2C (TWI), and SPI hardware communication protocols
• Features 6 PWM-capable digital outputs for motor speed control and LED dimming
• Built-in pin 13 test LED and board status indicators (Power, TX, RX)
• Hardware reset button for quick program restarts
• Fully supported by the open-source Arduino IDE and compatible with thousands of software libraries
• Standard form factor compatible with a wide array of Arduino expansion shields

Applications

• Microcontroller-based academic, polytechnic, and university engineering thesis projects
• Home automation and IoT monitoring systems when paired with GSM, Wi-Fi, or Bluetooth modules
• Robotics, motor driver control, and automated obstacle-avoidance vehicles
• Industrial environmental telemetry, data logging, and process control systems
• Smart agriculture applications, soil moisture tracking, and automated irrigation pumps
• Electronic prototyping, embedded software testing, and science fair demonstration models

Important Notes:

• Operating voltage is 5V; applying direct input voltages exceeding 5V to the I/O pins can permanently damage the ATmega328P microcontroller.
• When powering via the DC Barrel Jack or VIN pin, keep the input voltage within the recommended 7V to 12V range to avoid thermal shutdown of the onboard 5V regulator.
• Do not draw more than 20 mA continuously from any single digital I/O pin (absolute maximum peak is 40 mA).
• Always connect external loads like relay modules, high-current sensors, or external microcontrollers to a common GND with the Arduino board.
• Disconnect the TX (Pin 1) and RX (Pin 0) pins during code uploading if external serial modules (like GSM or Bluetooth) are connected to them to avoid programming errors.

Package includes

• 1 x Arduino Uno R3 Board (ATmega328P)
• 1 x USB Type-A to Type-B Cable