Arduino Pro Mini ATMEGA328P Compatible Board – 5V/16M

Arduino Pro Mini ATMEGA328P Compatible Board – 5V/16M is an ultra-compact, professional-grade microcontroller board designed for advanced users who prioritize space-saving and low-power consumption in their embedded projects. This board utilizes the powerful ATmega328P microcontroller, running at a stable 16 MHz with a 5V logic level to ensure compatibility with a vast array of standard sensors and actuators. Furthermore, because this design omits the bulky on-board USB-to-serial hardware found on the Arduino Uno, it significantly reduces the overall footprint and power overhead. Consequently, it represents the ideal solution for permanent installations in wearable tech, remote sensors, and flight controllers. Therefore, you can achieve professional results in miniaturized applications by integrating this robust and cost-effective development board into your hardware stack.

Key Features:

• Miniature Form Factor: The incredibly small PCB footprint allows for integration into tight spaces where a standard Arduino board simply cannot fit.
• High-Performance Microcontroller: It features the ATmega328P IC, providing 32 KB of flash memory and 2 KB of SRAM for complex program logic.
• Power Efficiency: By removing the USB interface chip, the board consumes less current, making it perfect for battery-powered or solar-powered deployments.
• 5V Logic Compatibility: The 5V operating voltage ensures seamless interfacing with common 5V peripherals without the need for logic level shifters.
• Expandable I/O: It breaks out all essential pins, including analog inputs and PWM outputs, providing the same functional capability as larger boards.

Technical Specifications:

• Microcontroller: ATmega328P
• Operating Voltage: 5 V
• Input Voltage (Raw): 5 V to 12 V
• Clock Speed: 16 MHz
• Digital I/O Pins: 14 (of which 6 provide PWM output)
• Analog Input Pins: 8
• Flash Memory: 32 KB (2 KB used by bootloader)
• SRAM: 2 KB
• EEPROM: 1 KB
• DC Current per I/O Pin: 40 mA

Mechanical Specifications:

• PCB Material: High-quality FR-4 glass epoxy
• Mounting: Through-hole solder pads for headers or direct wire attachment
• Weight: ≈ 2.0 g (excluding headers)
• Pin Header Pitch: Standard 2.54 mm (0.1 inch)

Dimensions:

• Length: ≈ 33.0 mm
• Width: ≈ 18.0 mm
• Thickness: ≈ 3.5 mm (PCB including components)

Pinout and Wiring:

• VCC / GND: Connect these pins to a regulated 5V power source for standard operation.
• RAW: Connect an unregulated power supply (up to 12V) to this pin; the on-board regulator will convert it to 5V.
• TX / RX: Connect these to an external FTDI or USB-to-TTL adapter to upload code or communicate via Serial.
• A0 – A7: Utilize these for analog sensor inputs; however, remember that A4 and A5 also serve as the I2C interface (SDA/SCL).
• Digital 3, 5, 6, 9, 10, 11: These pins support Pulse Width Modulation (PWM) for controlling motor speeds or LED brightness.
• DTR / Reset: Connect the DTR pin from your programmer to the DTR pad to enable automatic software resets during code uploads.

Datasheet Reference:

• Download ATmega328P Microcontroller Datasheet

Commonly Used in:

• Drone Flight Controllers: Its light weight and small size make it a favorite for custom DIY quadcopters.
• Wearable Electronics: Designers frequently embed this board into clothing or jewelry due to its low profile.
• Portable Instrumentation: It powers handheld devices that require a small screen and sensor logging.

Applications:

• Remote Monitoring: Deploying the board in the field for long-term data logging using battery power.
• Home Automation: Creating discrete smart-home nodes that fit inside wall switches or small enclosures.
• Education and Prototyping: Teaching advanced soldering and modular system design to engineering students.

Equivalent Models:

• Arduino Nano: A similar board that includes an on-board USB port; however, it features a larger footprint.
• Arduino Pro Mini (3.3V/8M): The low-voltage variant designed for 3.3V sensors and even lower power consumption.
• SparkFun Pro Micro: An alternative board using the ATmega32U4 which provides native USB support in a similar size.

Package Includes:

• 1 x Arduino Pro Mini ATMEGA328P Compatible Board (5V/16M Version)
• 1 x Set of Unsoldered Male Pin Headers