FREE SHIPPING for orders over 85.00

Arduino Micro - w/out Headers (A000093)

by Arduino

The Arduino Micro is a microcontroller board based on the ATmega32u4 (datasheet), developed in conjunction with Adafruit.

Gross Weight: 0.02kg
Warranty: 12 Months Manufacturer Warranty
Company: Arduino
Part Number: A000093
Made in: Italy
In Stock
Ships in 24 Hours
Low stock in store
Without VAT 19.35


The Arduino Micro is a microcontroller board based on the ATmega32u4 (datasheet), developed in conjunction with Adafruit. It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHzcrystal oscillator, a micro USB connection, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a micro USB cable to get started. It has a form factor that enables it to be easily placed on a breadboard.

The Micro is similar to the Arduino Leonardo in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Micro to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port. It also has other implications for the behavior of the board; these are detailed on the getting started page.

The Arduino Micro can be powered via the micro USB connection or with an external power supply. The power source is selected automatically.

External (non-USB) power can come either from a DC power supply or battery. Leads from a battery or DC power supply can be connected to the Gnd and Vin pins.

The board can operate on an external supply of 6 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may be unstable. If using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is 7 to 12 volts. 

The ATmega32u4 has 32 KB (with 4 KB used for the bootloader). It also has 2.5 KB of SRAM and 1 KB of EEPROM (which can be read and written with the EEPROM library).

Each of the 20 digital i/o pins on the Micro can be used as an input or output, using pinMode(), digitalWrite(), and digitalRead() functions. They operate at 5 volts. Each pin can provide or receive a maximum of 40 mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms.


  • This is the original board Arduino Micro.
  • Only the Micro board is included in the package, you can find a microUSB cable in our catalog and everything else you need for your project. This version of the Arduino Micro (A000093) does not include pins, you can see the A000053 version which comes with pre soldered pins.


12 Months Manufacturer Warranty
Part Number:
Made in:
Net Weight:
Operating Voltage:
Input Voltage:
Input Voltage (limits):
Digital I/O Pins:
Analog Input Channels:
PWM Channels:
DC Current per I/O Pin:
20 mA
DC Current for 3.3V Pin:
Flash Memory:
32 KB
2.5 KB (ATmega32u4)
1 KB (ATmega32u4)
Clock Speed:
16 MHz


  • Controller architecture: AVR
  • Dimensions: 48 x 18mm
  • Weight: 13g