UNO R3 Development Board ATmega328P Microcontroller with USB Cable, 5V Logic, 14 Digital I/O, 6 Analog Inputs, Fully Compatible with Arduino IDE for Robotics, IoT, and DIY Electronics Projects

The UNO R3 compatible development board powered by the ATmega328P microcontroller serves as the industry-standard hardware foundation for learning embedded systems, prototyping commercial concepts, and building DIY electronics. Designed around a proven 8-bit AVR RISC architecture, this board offers the ideal balance of hardware simplicity and functional versatility. Whether you are an electronics beginner, an engineering student exploring microcontroller architecture, or an experienced maker designing automated controllers, this board provides an accessible yet highly capable development environment. The included USB cable ensures immediate plug-and-play capability for programming and power delivery straight out of the box.

At the heart of the board is the high-performance Microchip ATmega328P 8-bit microcontroller running at a dedicated 16 MHz crystal oscillator frequency. The core features 32 KB of in-system programmable flash memory (with 0.5 KB utilized by the pre-flashed bootloader), 2 KB of internal SRAM for dynamic variable storage, and 1 KB of non-volatile EEPROM for retaining configuration data through power cycles.

The board integrates 14 digital input/output pins, 6 of which deliver 8-bit pulse-width modulation (PWM) output suitable for motor speed regulation, LED dimming, and analog signal approximation. Additionally, 6 analog input channels route to an onboard successive approximation analog-to-digital converter (ADC) offering 10-bit resolution (1024 discrete steps) across a 0 to 5V reference range. Hardware communication is fully supported via dedicated UART TTL serial lines (pins 0 and 1), I2C two-wire interface (pins A4/SDA and A5/SCL), and high-speed Serial Peripheral Interface (SPI on pins 10, 11, 12, and 13). An onboard ICSP header enables direct low-level AVR ISP programming without bootloader dependency. Power regulation is managed via dual linear regulators, providing both clean 5V and 3.3V power rails, protected by a self-resetting polyfuse to safeguard your host computer from short circuits.

• Microcontroller: Microchip ATmega328P
• Architecture: 8-bit AVR RISC
• Operating Voltage: 5V DC
• Recommended Input Voltage (VIN / Barrel Jack): 7V to 12V DC
• Absolute Input Voltage Limits: 6V to 20V DC
• Digital I/O Pins: 14 total (Pins D0 to D13)
• PWM Channels: 6 hardware channels (Pins D3, D5, D6, D9, D10, D11)
• Analog Input Channels: 6 dedicated channels (Pins A0 to A5)
• ADC Resolution: 10-bit (0 to 1023 values)
• DC Current per I/O Pin: 20 mA recommended (40 mA absolute maximum)
• DC Current for 3.3V Output Rail: 50 mA maximum
• Flash Memory: 32 KB (0.5 KB allocated to bootloader)
• SRAM: 2 KB
• EEPROM: 1 KB
• Clock Speed: 16 MHz Crystal Oscillator
• USB Interface: USB Type-B connector (bridge chip varies by module revision)
• PCB Dimensions: 68.6 mm x 53.4 mm
• Approximate Weight: 25 grams

• Robotics and Mechatronics: Multi-channel motor control, servo manipulation, obstacle-avoiding mobile platforms, and robotic arm articulation.
• Educational Demonstrations: Learning C/C++ programming, basic circuit analysis, logic gates, and microcontroller input/output fundamentals in classroom and lab environments.
• Home Automation & Smart Devices: Controlling lighting relays, environmental thermostat systems, automated plant watering controllers, and smart appliance monitors.
• Sensor Data Acquisition: Interfacing with temperature, humidity, ultrasonic distance, gas, light, motion, and pressure sensors for real-time data logging.
• Rapid Electronics Prototyping: Testing proof-of-concept hardware circuits prior to custom PCB layout and production fabrication.

Connect the board to your host machine using the provided USB cable. In the Arduino IDE, select "Arduino Uno" under the Tools > Board menu and choose the corresponding serial COM port. If your specific board revision utilizes a CH340 or similar USB-to-UART bridge IC, ensure the appropriate device driver is installed on your operating system. When powering the board from an external source through the 2.1mm center-positive DC barrel jack, maintain supply voltage between 7V and 12V for optimal regulator efficiency and heat dissipation. Do not apply external voltages exceeding 5V directly to the 5V power pin or any digital/analog I/O pin to avoid irreversible damage to the microcontroller.

1 x UNO R3 Compatible Board, 1 x USB Type-B Connection Cable