Arduino Micro – ATmega32u4 Microcontroller Board
The Arduino Micro is a small but powerful microcontroller board based on the ATmega32U4, developed in collaboration with Adafruit. Its breadboard-friendly form factor makes it perfect for embedded projects, wearables, and space-constrained designs, while still delivering the full capabilities of an Arduino board.
Like the Arduino Leonardo, the Micro takes advantage of the ATmega32U4’s built-in USB communication, removing the need for a separate USB-to-serial converter. This allows the board to directly act as a keyboard, mouse, or virtual serial (CDC) COM port, opening up unique possibilities for HID (Human Interface Device) projects such as custom controllers, input devices, and interactive installations.
With 20 digital I/O pins (7 PWM outputs, 12 analog inputs), a 16 MHz clock, and easy connectivity via Micro-USB, the Arduino Micro balances performance and portability. Simply plug it into your computer to get started—no extra hardware required.
Key Features
- Compact Design: Slim 48 × 18 mm size, perfect for breadboards and embedded use.
- Native USB Support: Acts as a keyboard, mouse, or virtual COM port.
- Versatile I/O: 20 digital pins, 7 PWM outputs, and 12 analog inputs.
- Plug & Play: Powered and programmed directly via Micro-USB.
- Developed with Adafruit: Reliable, maker-friendly design for DIY and professional projects.
Technical Specifications
- Microcontroller: ATmega32U4
- Operating Voltage: 5V
- Input Voltage (recommended): 7–12V
- Input Voltage (limits): 6–20V
- Digital I/O Pins: 20 (7 PWM outputs)
- Analog Input Channels: 12
- DC Current per I/O Pin: 20 mA
- DC Current for 3.3V Pin: 50 mA
- Flash Memory: 32 KB (4 KB used by bootloader)
- SRAM: 2.5 KB
- EEPROM: 1 KB
- Clock Speed: 16 MHz
- Built-in LED Pin: 13
- USB Connector: Micro-USB
- Dimensions: 48 mm × 18 mm
- Weight: 13 g
The Arduino Micro is the go-to choice for makers who need Arduino’s power in a compact package. From wearable tech to custom USB devices, it delivers flexibility, reliability, and simplicity in one small board.
