Uno R3 Development Board – SMD ATmega328P (Arduino-Compatible)
The undisputed gold standard for electronics prototyping just got more reliable. The Uno R3 SMD Development Board packs the exact same processing architecture, memory, and pin layout as the classic Uno, but replaces the traditional DIP chip with a sleek, surface-mounted SMD ATmega328P microcontroller.
This surface-mount design ensures superior thermal performance, higher vibration resistance, and overall enhanced board reliability. 100% compatible with the Arduino ecosystem, this is the ultimate, budget-friendly cornerstone board for students, hobbyists, and professional engineers looking to bring their embedded ideas to life.
Key Features
Surface-Mount Technology (SMD): Built with a high-efficiency SMD ATmega328P chip, offering greater mechanical durability and lower profile routing than older DIP-socket configurations.
100% Arduino IDE Ecosystem Support: Fully compatible with standard Arduino software, codes, libraries, and existing shields without requiring any code modifications.
Extra Prototyping Pads: The SMD variant uniquely breaks out extra hardware tracing rows (GND, 5V, 3V3, I2C, UART) right next to the main headers, allowing you to easily solder extra sensor hookups.
Robust Power Protection: Features an onboard resettable polyfuse that automatically protects your computer's USB ports from accidental short circuits and overcurrent anomalies.
Plug-and-Play USB Interface: Equipped with the reliable CH340 serial-to-USB controller chip for steady, high-speed flashing and seamless serial monitoring.
Technical Specifications
Feature | Specification |
Microcontroller | ATmega328P (SMD Package) |
Operating Voltage | 5V |
Input Voltage (Recommended) | 7V – 12V (via DC Barrel Jack or VIN pin) |
Input Voltage (Limits) | 6V – 20V |
Digital I/O Pins | 14 (of which 6 provide hardware PWM output) |
Analog Input Pins | 6 Channels (10-bit resolution) |
DC Current per I/O Pin | 20 mA (Max 40mA limit) |
Flash Memory | 32 KB (0.5 KB used by the bootloader) |
SRAM / EEPROM | 2 KB / 1 KB |
Clock Speed | 16 MHz |
USB Interface Chip | CH340G |
Pinout & Interface Breakdown
The Uno R3 SMD is engineered with a standard shield-compatible layout for seamless expandability:
Power Delivery Options: Features three ways to power up—via the rugged USB Type-B port, a standard 2.1mm center-positive DC Jack, or directly using the VIN and GND pins.
Pulse Width Modulation (PWM): Pins 3, 5, 6, 9, 10, and 11 provide native 8-bit analog outputs to effortlessly control servo motors or dim LED strings.
Onboard Indicators: Equipped with 4 bright SMD LEDs showing status for power, system reset, and active serial transmission (TX / RX).
Standard Protocols: Built-in hardware tracks support I2C communication on pins SDA and SCL (located near the AREF pin) and hardware SPI communication on pins 10 (SS), 11 (MOSI), 12 (MISO), and 13 (SCK).
Common Applications
Engineering & DIY Projects: The perfect learning platform for basic electronics, display interfacing, and ambient sensor arrays.
Robotics Kits: Serves as the master brain for autonomous obstacle-avoiding cars, robotic arms, and automated rovers.
Industrial Prototyping: Ideal for creating rapid hardware proof-of-concepts, machinery safety checks, and data acquisition arrays.
Note for Developers: If your machine does not immediately detect the board, install the standard CH340 driver for Windows/macOS. When flashing code through the Arduino IDE, simply select "Arduino Uno" under the Boards menu, pick your active COM port, and hit upload!
Package Includes:
1 x Uno R3 SMD ATmega328P Development Board (Arduino-Compatible)