Arduino Uno R3 SMD Microcontroller Board with USB Cable

The Arduino Uno R3 SMD is a versatile, beginner-friendly, and cost-effective open-source microcontroller board designed for electronics learning, rapid prototyping, and DIY automation. Built around the surface-mount ATmega328P chip, this board delivers the exact same operational performance, pinout, and pin compatibility as the standard DIP version, but in a more streamlined and budget-friendly footprint.

Whether you are a student building your first circuit, a maker working on robotics, or an engineer prototyping an IoT system, the Uno R3 SMD provides a stable foundation backed by thousands of open-source Arduino libraries and tutorials.

Key Highlights

1. ATmega328P SMD Core: Powered by the reliable surface-mount ATmega328P microcontroller running at 16 MHz.
2. 100% Arduino IDE Compatible: Effortlessly code, upload sketches, and utilize open-source libraries via standard C/C++.
3. Standard Form Factor & Pinout: Seamlessly works with existing Arduino shields, expansion boards, and sensors.
4. Plug-and-Play Prototyping: Includes digital I/O, PWM, analog inputs, and standard communication buses (UART, SPI, I2C).
5. Onboard Hardware Reset: Easy-access tactile reset switch to instantly restart your running code.

Technical Specifications

Quick Comparison: SMD vs. DIP (Standard) Version

While both versions execute identical software code and run at the same speed, key hardware differences include:

Pinout Overview

1. Digital I/O (Pins 0–13): Interfacing with switches, LEDs, relays, and modules.
2. PWM Outputs (Pins 3, 5, 6, 9, 10, 11): Analog-like control for motor speeds and LED dimming.
3. Analog Inputs (Pins A0–A5): 10-bit resolution inputs for reading sensors (temperature, light, distance).
4. Serial / Communication:
5. UART: Pins 0 (RX) and 1 (TX)
6. I2C: Pins A4 (SDA) and A5 (SCL)
7. SPI: Pins 10 (SS), 11 (MOSI), 12 (MISO), 13 (SCK)

1. Power Pins: 5V, 3.3V, GND, and Vin for powering external hardware or taking external power supply.

Getting Started & Driver Setup

1. Connect: Plug the board into your PC using the included USB cable.
2. Drivers (If Required): If your computer does not automatically recognize the COM port, install the standard CH340 or FT232 USB driver matching your computer's OS.
3. Program: Launch the Arduino IDE, select Tools > Board > Arduino Uno, choose the matching COM port, write or load your code, and click Upload.

Package Contents

1. 1 × Arduino Uno R3 SMD Board
2. 1 × USB Data Cable
3. 1 × Single Row Male Pin Header