Overview
The UNO R3 Development Board is a cost-effective microcontroller board based on the ATmega328P. It features the CH340G USB driver, which provides reliable USB-to-serial communication, for programming and debugging. Fully compatible with the Arduino IDE, this board supports easy code uploads and extensive community-driven resources.
With an operating voltage of 5V, the UNO R3 can be powered through USB or an external power supply (7-12V recommended, 6-20V max), offering flexibility for various applications. It comes with 14 digital I/O pins, of which 6 support PWM, along with 6 analog input pins, allowing for a wide range of sensor and actuator connections. The board has 32 KB of flash memory, including 0.5 KB reserved for the bootloader, 2 KB of SRAM, and 1 KB of EEPROM for data storage.
The 16 MHz clock speed ensures efficient processing speeds, making the board ideal for real-time applications. Communication is supported through UART, SPI, and I2C interfaces, providing connectivity options for external modules. It features a USB Type-B connector for programming and power, along with built-in LED indicators for power and status monitoring. Compact and lightweight at approximately 25g, the UNO R3 is perfect for prototyping and embedded development.
Applications
The UNO R3 is widely used in DIY electronics, robotics, IoT prototyping, home automation, sensor-based projects, data logging, and educational learning projects.
Specification
Technical details for UNO R3 Development Board.
| Specification | Details |
|---|---|
| Microcontroller | ATmega328P |
| USB Driver | CH340G |
| Operating Voltage | 5V |
| Input Voltage (recommended) | 7-12V |
| Input Voltage (limit) | 6-20V |
| Digital I/O Pins | 14 (6 with PWM capability) |
| Analog Input Pins | 6 |
| Flash Memory | 32 KB (0.5 KB used by the bootloader) |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Clock Speed | 16 MHz |
| Communication Interfaces | UART, SPI, I2C |
| USB Connector | USB Type-B |
| Weight | ~25g |
Board Layout
| Component | Description |
|---|---|
| Microcontroller | ATmega328P – The primary microcontroller processing unit of the board. |
| USB Port (Type-B) | Used for power and programming via the CH340G USB-to-serial converter. |
| DC Power Jack | Allows external power input (7-12V recommended). |
| Reset Button | Resets the board for restarting programs. |
| Voltage Regulator | Provides stable 5V and 3.3V outputs. |
| Digital I/O Pins | 14 pins (0-13), including 6 PWM-capable pins (3, 5, 6, 9, 10, 11). |
| Analog Input Pins | 6 pins (A0-A5) for connecting sensors and analog devices. |
| Power Pins | Includes 3.3V, 5V, GND, and Vin for external connections. |
| ICSP Header | Used for low-level programming and bootloader updates. |
| LED Indicators |
|
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