Arduino Uno R3 SMD Version (CH340 or ATmega328P SMD)

The Arduino Uno R3 SMD version is a compact and efficient version of the classic Uno board, featuring the ATmega328P microcontroller in Surface Mount Device (SMD) form. It provides the same functionality as the DIP version but uses less space and is often more affordable. Perfect for students, hobbyists, and professionals in Arduino projects, robotics, automation, and IoT systems.

This board is 100% compatible with the Arduino IDE and supports USB programming through the CH340G USB-to-Serial chip (in some variants), ensuring stable and reliable uploading of code. It includes 14 digital I/O pins (6 PWM), 6 analog inputs, and standard headers for shields, sensors, and modules.

Use it in home automation, sensor interfacing, motor control, and educational kits — it’s the most commonly used Arduino board for a reason.

⭐ Key Features:

• 🔌 Based on ATmega328P SMD microcontroller

• 💻 Compatible with Arduino IDE (Windows, Linux, macOS)

• 🔁 USB interface (CH340 or ATmega16U2 based) for easy programming

• ⚙️ Compact SMD design – ideal for space-saving applications

• 🧠 Perfect for learning embedded systems, robotics, and IoT

• 🧩 Compatible with most Arduino shields and sensors

• 🔋 5V operating voltage – safe for most modules and devices

⚙️ Technical Specifications:

• Microcontroller: ATmega328P (SMD)

• USB Interface Chip: CH340G or ATmega16U2 (based on version)

• Operating Voltage: 5V

• Input Voltage (recommended): 7–12V

• Digital I/O Pins: 14 (6 PWM outputs)

• Analog Input Pins: 6

• DC Current per I/O Pin: 40 mA

• Flash Memory: 32 KB (0.5 KB used by bootloader)

• SRAM: 2 KB

• EEPROM: 1 KB

• Clock Speed: 16 MHz

• USB Connector: Type B

• Dimensions: 68.6 mm x 53.4 mm

• Weight: ~25g