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ATTO Board – The World’s Smallest Arduino Compatible Board

Atto is the world’s smallest Arduino compatible board! It is based on the ATmega32U4 microcontroller and comes with reset push-button as well as an RGB (rainbow) LED controlled by 3 PWM channels.

Atto’s tiny profile allows it to fit into any miniature projects! Perfect for wearables and portable devices. There are also available two different types of breadboard friendly expansion boards and all products from nionics.com are available for pre-order. According to website, Additional accessories and add-ons, such as battery power shields, will be coming soon!

Specs and Features of ATTO Board

ATTO board specifications:

  • MCU – Microchip (Atmel) ATmega32U4 8-bit AVR microcontroller @ 16 MHz with 32KB flash pre-loaded with Arduino Leonardo bootloader (~4KB footprint), 2.5KB SRAM, 1KB EEPROM
  • Expansion – 2x 8-pin 1.27mm pitch through holes for 12 digital I/Os, 4x PWM, and 4x analog input channels. UART, SPI, I2C/TWI, and ISP interfaces are also supported
  • USB – Micro USB port for power and programming
  • Misc – RGB LED via 3x PWM, Reset push-button
  • Power Supply – Input: 4-13V DC via Vin, 5V via micro USB port; 3.3V operating voltage
  • Dimensions – 11.5mm x 10.4 mm
  • Weight – 0.68 grams


atto dev board

ATTO Pinout Diagram

atto pinout diagramWatch this video:

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Harshvardhan Mishra

Hi, I'm Harshvardhan Mishra. Tech enthusiast and IT professional with a B.Tech in IT, PG Diploma in IoT from CDAC, and 6 years of industry experience. Founder of HVM Smart Solutions, blending technology for real-world solutions. As a passionate technical author, I simplify complex concepts for diverse audiences. Let's connect and explore the tech world together! If you want to help support me on my journey, consider sharing my articles, or Buy me a Coffee! Thank you for reading my blog! Happy learning! Linkedin

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