HKD UNO REV3 ATmega328P Development Board ATmega16U2 USB

The HKD UNO REV3 is an Arduino UNO R3 compatible development board based on the ATmega328P microcontroller and featuring an ATmega16U2 USB interface controller. It is designed for electronics development, programming, prototyping, robotics, automation and educational projects.

Unlike low-cost UNO-compatible boards that commonly use a CH340 USB interface, this board uses the ATmega16U2 USB driver/interface, providing the familiar UNO R3 USB architecture and supporting faster USB transfer rates and additional memory compared with the older ATmega8U2 implementation.

The board operates at 5V and provides 14 digital I/O pins, including 6 PWM-capable outputs, along with 6 analog input pins. This provides a flexible range of connections for sensors, LEDs, motors, displays, switches, modules and other electronic components.

The ATmega328P provides 32KB of Flash memory, 2KB of SRAM and 1KB of EEPROM, with a 16MHz clock speed. Of the available Flash memory, approximately 0.5KB is used by the bootloader.

With support for both digital and analog interfacing, the HKD UNO REV3 is suitable for a wide variety of embedded development and DIY electronics applications.

Key Features

• UNO R3 compatible development board
• ATmega328P microcontroller
• ATmega16U2 USB interface controller
• Uses ATmega16U2 instead of CH340
• 5V operating voltage
• 14 digital I/O pins
• 6 PWM-capable digital outputs
• 6 analog input pins
• 16MHz clock speed
• 32KB Flash memory
• 2KB SRAM
• 1KB EEPROM
• 40mA DC current per I/O pin
• 50mA maximum current for 3.3V pin
• Recommended input voltage of 7-12V
• Wide input voltage limits of 6-20V
• Suitable for programming and prototyping
• Ideal for robotics, automation and DIY electronics

ATmega328P Microcontroller

The HKD UNO REV3 is built around the ATmega328P, a widely used microcontroller for embedded electronics and development projects.

The microcontroller provides:

• 32KB Flash memory
• 2KB SRAM
• 1KB EEPROM
• 16MHz clock speed
• 14 digital I/O pins
• 6 analog inputs
• 6 PWM outputs

The available I/O provides flexibility for connecting external sensors, actuators, displays and other electronic modules.

ATmega16U2 USB Interface

One of the key features of this UNO REV3 compatible board is its ATmega16U2 USB interface controller.

The board uses the ATmega16U2 rather than the CH340 USB interface commonly found on lower-cost UNO-compatible boards. The supplied information specifies that the ATmega16U2 provides faster transfer rates and more memory compared with the older ATmega8U2 implementation.

The ATmega16U2-based USB interface is designed to provide convenient communication between the development board and a computer for programming and serial communication.

Digital I/O

The board provides 14 digital I/O pins, giving users multiple connection points for digital devices and peripherals.

Of these 14 digital pins:

• 6 provide PWM output
• Each I/O pin supports up to 40mA DC current

Digital I/O can be used for a wide range of project requirements, including switches, LEDs, sensors, modules and other compatible peripherals.

Analog Inputs

The HKD UNO REV3 includes 6 analog input pins for connecting compatible analog sensors and devices.

These inputs allow projects to interface with components that provide variable electrical signals rather than simple digital ON/OFF states.

PWM Outputs

Six of the digital I/O pins provide PWM output capability.

PWM can be used in suitable applications for functions such as:

• LED brightness control
• Motor control
• Servo-related applications
• Variable output control
• Other PWM-based electronics projects

Memory

The ATmega328P provides three main types of onboard memory:

• Flash Memory: 32KB
• SRAM: 2KB
• EEPROM: 1KB

Approximately 0.5KB of the Flash memory is used by the bootloader, leaving the remaining program memory available for user applications.

Operating and Input Voltage

The microcontroller operates at 5V.

For external input power, the supplied specifications state:

• Recommended input voltage: 7-12V
• Input voltage limits: 6-20V

For reliable operation, the recommended input voltage range should be followed.

Current Specifications

The board provides the following current specifications:

• DC current per I/O pin: 40mA
• DC current for 3.3V pin: 50mA

External loads should be operated within the specified current limits.

Development and Programming

The HKD UNO REV3 is intended for use as a programmable development platform. Its ATmega328P microcontroller and USB interface make it suitable for writing, uploading and testing embedded programs.

It can be used for developing projects ranging from simple LED and sensor experiments through to more advanced robotics and automation systems.

The supplied information states that Linux and Mac systems do not require additional drivers, while the required Windows .inf file is included with the Arduino IDE.

Applications

The HKD UNO REV3 is suitable for:

• Arduino-compatible projects
• Electronics prototyping
• DIY electronics
• Robotics
• Automation projects
• Sensor projects
• Embedded systems
• Educational electronics
• STEM projects
• Motor-control projects
• LED projects
• Display projects
• Home automation
• IoT prototyping
• Microcontroller development
• Hardware experimentation

Technical Specifications

• Product Code: HKD UNO REV3
• Board Type: UNO R3 Compatible Development Board
• Microcontroller: ATmega328P
• USB Interface Controller: ATmega16U2
• Operating Voltage: 5V
• Recommended Input Voltage: 7-12V
• Input Voltage Limits: 6-20V
• Digital I/O Pins: 14
• PWM Outputs: 6
• Analog Input Pins: 6
• DC Current per I/O Pin: 40mA
• DC Current for 3.3V Pin: 50mA
• Flash Memory: 32KB
• Flash Used by Bootloader: 0.5KB
• SRAM: 2KB
• EEPROM: 1KB
• Clock Speed: 16MHz
• USB Driver/Interface: ATmega16U2
• Board Compatibility: Arduino UNO R3

Package Contents

• 1 × HKD UNO REV3 ATmega328P Development Board

Important Notes

• This is an Arduino UNO R3 compatible development board.
• The board uses an ATmega16U2 USB interface rather than a CH340.
• The ATmega328P operates at 5V.
• Recommended input voltage is 7-12V.
• The stated input voltage limits are 6-20V.
• Do not exceed the specified current limits for individual I/O pins.
• The Windows .inf file is included in the Arduino IDE according to the supplied information.

What's in the box
1 x HKD UNO REV3 ATmega328P Development Board ATmega16U2 USB