Arduino Uno R3 SMD with USB Cable

Overview

Arduino Uno R3 SMD with USB Cable is a cost-effective development board based on the surface-mount ATmega328P microcontroller. It offers identical functionality and pin compatibility to the traditional DIP version of the Arduino Uno R3, making it a reliable choice for student projects, robotics, and industrial automation. Featuring the CH340G USB-to-Serial converter chip, this board easily connects to computers for fast code uploading and debugging via the included USB cable.

Features

• Powered by the surface-mount ATmega328P-AU 8-bit AVR microcontroller
• Uses the CH340G USB-to-Serial IC for low-cost and stable computer connectivity
• Includes additional solder pad headers for extra I2C, UART, and power expansion
• Standard USB Type-B / Mini-USB interface for simple programming and serial monitoring
• Onboard 5V and 3.3V linear voltage regulators for external sensors and modules
• 6 PWM-capable digital outputs for speed control and signal modulation
• Supports UART, I2C (TWI), and SPI hardware communication interfaces
• Built-in pin 13 LED indicator along with Power, TX, and RX status LEDs
• Fully compatible with the official Arduino IDE and standard Arduino shields

Applications

• Microcontroller-based academic, polytechnic diploma, and university engineering projects
• Cost-sensitive IoT, home automation, and smart monitoring systems
• Robotics, motor controller interfacing, and autonomous vehicles
• Environmental sensing, water quality monitoring, and data logging
• Smart agriculture applications, automated irrigation, and soil moisture tracking
• Prototyping, science fair exhibits, and embedded software testing

Important Notes:

• Install the CH340 USB driver on your computer if the board is not automatically recognized by the Arduino IDE upon plugging in.
• Operating voltage is 5V; applying direct input voltages exceeding 5V to the I/O pins will cause permanent damage to the board.
• When using an external DC power supply via the barrel jack or VIN pin, keep the voltage within the recommended 7V–12V range.
• Do not draw more than 20 mA continuously from any single digital I/O pin to prevent chip degradation.
• Always connect external modules, relay drivers, and microcontrollers to a common GND with the board for stable signal reference.
• Disconnect RX (Pin 0) and TX (Pin 1) before uploading code if external serial modules (GSM, Bluetooth) are attached to those pins.

Package includes

• 1 x Arduino Uno R3 SMD Board (ATmega328P SMD + CH340G)
• 1 x High-Quality USB Cable
• 1 x Male Pin Header Strip (unsoldered)