Arduino Pro Micro – Compact ATmega32U4 Development Board (5V, 16MHz)

Arduino Pro Micro – Compact ATmega32U4 Development Board (5V, 16MHz)

The Arduino Pro Micro is a miniature yet powerful microcontroller board powered by the ATmega32U4 chip. Its standout feature is the native USB support, allowing it to directly act as a USB device such as a keyboard, mouse, or other Human Interface Device (HID) without needing an external USB-to-serial converter.

This makes the Pro Micro ideal for compact projects where space is limited but USB functionality is required, including custom keyboards, controllers, wearable electronics, and automation prototypes.

Key Features

• Built on the ATmega32U4 microcontroller
• Operating voltage: 5 V
• Clock speed: 16 MHz
• Native USB support for HID devices
• Small and compact form factor
• Compatible with the Arduino IDE
• Can emulate keyboard, mouse, and other USB devices
• Perfect for space-constrained or portable projects

Technical Specifications

• Microcontroller: ATmega32U4
• Operating Voltage: 5 V
• Input Voltage: 7–12 V recommended
• Digital I/O Pins: 12
• PWM Channels: 5
• Analog Input Pins: 4
• Flash Memory: 32 KB (0.5 KB used by bootloader)
• SRAM: 2.5 KB
• EEPROM: 1 KB
• Clock Speed: 16 MHz
• USB Interface: Native USB

Applications

The Arduino Pro Micro is widely used for:

• Compact keyboard and mouse emulation projects
• Custom game controllers and joysticks
• Wearable electronics and small robotics
• DIY USB HID devices
• Automation and control projects
• Interactive art and maker projects

Its small footprint and USB capability make it a flexible choice for projects that need both portability and direct computer interaction.

Getting Started

1. Connect the board to your computer via USB
2. Install the Arduino IDE and select “Arduino Pro Micro”
3. Choose the correct COM port
4. Upload sketches using the standard Arduino IDE

With these steps, you can start building compact and functional electronics quickly.

Why Choose Arduino Pro Micro

• Small size with full USB functionality
• No extra USB-to-serial converter needed
• Easy to program using standard Arduino libraries
• Ideal for portable, embedded, and HID-based projects
• Compatible with a variety of sensors, modules, and shields