Arduino Micro without Headers - 5V 16MHz ATmega32u4 - Assembled
The Arduino Micro is the smallest board in the Arduino family, packing all the power of the Arduino Leonardo into a tiny 48 × 18 mm package. Based on the ATmega32U4 with built-in USB, it can emulate a keyboard, mouse, or other USB HID device — perfect for interactive projects and USB client applications.
Developed in conjunction with Adafruit, this version ships without headers for an ultra-thin profile — ideal for direct soldering into custom projects or embedding into enclosures. It runs at 5V logic with a 16MHz crystal and features a micro USB connector for programming and power.
Key Features
- Ultra-Compact – Just 48 × 18 mm, the smallest Arduino form factor
- No Headers – Ultra-thin for embedding; solder your own headers or wire directly
- Native USB – Built-in USB on the ATmega32U4 enables keyboard, mouse, and HID device emulation
- 20 Digital I/O Pins – 7 usable as PWM outputs
- 12 Analog Inputs – 10-bit resolution
- Onboard LEDs – Power, TX, RX, and user-controllable pin 13 LED
- 3.3V Regulator – Onboard regulated 3.3V output
Specifications
- Microcontroller – ATmega32U4
- Operating Voltage – 5V
- Clock Speed – 16MHz
- Digital I/O Pins – 20
- PWM Channels – 7
- Analog Input Channels – 12
- Flash Memory – 32KB
- SRAM – 2.5KB
- Board Dimensions – 48 × 18 mm (1.9 × 0.7 in)
Note: The Arduino Micro is not shield-compatible but has all the same pins as the Leonardo. A micro-B USB cable is required for programming (not included).
Ideal For
- Embedded projects requiring a headerless, thin-profile board
- USB HID projects (custom keyboards, mice, game controllers, MIDI)
- Wearable electronics and custom installations
- Shrinking Arduino projects to a minimal footprint
Package Contents
- 1× Arduino Micro without headers (assembled)
The Arduino Micro without Headers - 5V 16MHz ATmega32u4 - Assembled appears in the following collections:
SKU AF-1315
by Adafruit
