Original Arduino Micro without Headers - A000093

Arduino A000093 - Micro without headers

Original Arduino Micro Development Board (No Headers) a compact, breadboard-friendly microcontroller board based on the renowned ATmega32U4 MCU. It's ideal for embedded electronics, compact prototypes, and USB-enabled interactive projects.

INFOGRAPHIC OVERVIEW Arduino Micro without Headers (A000093)

 Arduino Micro (A000093) | Microcontroller | ATmega32U4 8-bit AVR | | Clock Speed | 16 MHz | | Flash Memory | 32 KB (4 KB used by bootloader) | | SRAM | 2.5 KB | | EEPROM | 1 KB | | USB Support | Native USB (HID + Serial) | | I/O Pins | 20 (7 PWM, 12 Analog) | | Operating Voltage | 5 V | | Power | USB or 712 V via Vin | | Dimensions | 48 oard uses the ATmega32U4 microcontroller from the AVR family the same chip used in Arduino Micro but in a headerless form so you can directly solder custom connectors or wires to it for built-in projects.

Key Features

Native USB support no USB-to-serial chip needed Appears as mouse, keyboard, joystick, or MIDI device Ideal for HID projects or compact embedded builds

2 Size & Form Factor

Small footprint makes connectors.

3 Connectivity & I/O

20 Digital I/O Pins lots of flexibility 7 PWM Outputs for motor and LED control 12 Analog Inputs sensors & analog reads UART, SPI, I2C communication protocols Micro-USB port for power and programming

Because it's header-less, you can solder the exact type of pins, wires, or connectors you need for a custom embedded design.

4 Power Options

Powered directly from USB Powered from external 712 V (via Vin pin) Operating logic voltage: 5 V

The recommended input voltage is 712 V going above this mightro boards) is native USB support: Acts as a keyboard Acts as a mouse Acts as a game controller Acts as a serial COM port to the host computer

This makes it great for interactive devices and HID projects without extra USB adapter chips.

6 Why Choose the Headerless Version?

Customize pin connectors for your project Low profile in embedded designs Solder right into PCBs or custom boards Ideal for robotics, wearables, and compact IoT devices

Many makers prefer to solder right-angle headers, female sockets, or wire leads depending on their project's mechanical design.

7 Programming & Ecosystem

Works with Arduino IDEtng> in IDE Compatible with most Arduino libraries for I/O, HID, and communication

Because it's an official Arduino product, it enjoys full ecosystem support, tutorials, and community libraries.

8 Ideal Use Cases

Custom embedded controllers Compact robotics brains USB HID devices (keyboard, mouse, gamepad) Wearables & sensor nodes Breadboard rapid prototyping Space-constrained IoT modules

9 Micro vs Headered Version

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Summary

The Original Arduino Micro without Headers (A000093) is an official microcontroller board built around the ATmega32U4. Its compact, headerless design lets you customize connectors and embed it cleanly into projects. With native USB support and plenty of I/O, it's great for interactive devices, compact robotics, and embedded systems