Nionics ATTO: The world's smallest Arduino board with RGB LED

World's smallest Arduino board named nionics Atto is very power full and tiny development board available with Arduino now .

Image source nionics

Serial and ISP Pins

USB, SPI, I2C, and ISP are available, to handle any interface and allows custom bootloader programming

Arduino Ready
Comes with Arduino bootloader pre-flashed, providing you seamless out of the box experience.

Specs and Features

Dimension

0.40" x 0.45" (10.3 mm x 11.5 mm)

Weight

0.04 oz (0.68 g)

Microcontroller

ATmega32U4

Operating Voltage

3.3 V

Input Voltage

4 - 13 V

Digital I/O Pins

12 + 3 (RGB LED)

PWM Channels

4 + 3 (RGB LED)

Analog Input Channels

4

Interface

USB, SPI, I2C (TWI), ISP

Peripherals

Reset button, RGB (rainbow) LED

Bootloader

Arduino Leonardo

Flash Memory

32 KB (ATmega32U4) of which 4 KB used by bootloader

SRAM

2.5 KB (ATmega32U4)

EEPROM

1 KB (ATmega32U4)

Clock Speed

16 MHz

Pin Pitch

0.05" (1.27 mm