Arduino Micro

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The Arduino Micro is essentially a shrunk-down (1.9″ × 0.7″) version of the Arduino Leonardo: it is a microcontroller board based on the ATmega32U4 running at 16 MHz with 24 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog

Overview

The Arduino Micro is a microcontroller board based on the ATmega32U4, developed in conjunction with Adafruit. It has 24 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connector, an in-circuit system programming (ICSP) header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer (or appropriate wall power adapter) with a Micro USB cable (not included) to get started. The headers are arranged with a 0.1″ spacing for compatibility with standard solderless breadboards and perfboards and connectors that use a 0.1″ grid.

The Arduino Micro features a user-programmable ATmega32U4 AVR microcontroller that has built-in USB functionality, eliminating the need for a secondary processor or serial adapter. This makes the Arduino Micro more versatile: in addition to supporting a virtual (CDC) serial/COM port interface, it can appear to a connected computer as a mouse and keyboard. See Arduino’s getting started page for more implications of the Arduino Micro’s single-MCU design.

The Arduino has a large support community and an extensive set of support libraries, making it a great introductory platform for embedded electronics. Note that we also offer a SparkFun Starter Kit for RedBoard and a SparkFun Inventor’s Kit, both of which include an Arduino-compatible RedBoard along with an assortment of components (e.g. breadboard, sensors, jumper wires, and LEDs) that make it possible to create a number of fun introductory projects.

We also carry A-Star programmable controllers that are based on the same ATmega32U4 microcontrollers as the Arduino Micro and Leonardo and ship with Arduino-compatible bootloaders. The A-Star 32U4 Minis are the same size as the Arduino Micro but offer a number of advantages, including integrated switching regulators that let them operate efficiently over a much wider voltage range (the Mini ULV can operate down to 0.5 V, the LV works with voltages above and below 5 V, and the SV works up to 36 V), and the A-Star 32U4 Micro is an even smaller, lower-cost alternative.

Pololu A-Star 32U4 Micro, Pololu A-Star 32U4 Mini SV, Arduino Micro, and Arduino Leonardo.rmation about the Arduino Micro is available on Arduino’s website.

Summary


Microcontroller: ATmega32U4
Operating voltage: 5 V
Input voltage (recommended): 7-12 V
Digital I/O pins: 24 (of which 7 provide PWM output)
Analog input pins: 12(1)
DC current per I/O pin: 40 mA
DC current for 3.3V pin: 50 mA
Flash memory: 32 KB of which 4 KB used by bootloader
SRAM: 2.5 KB
EEPROM: 1 KB
Clock speed: 16 MHz

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