Arduino GEMMA Miniature Wearable Electronic Platform

What do you get when you combine an Adafruit classic with geniuses at Arduino? The Arduino GEMMA! It's a tiny wearable platform board with a lot of might in a 1" diameter package. Powered by an Attiny85 microcontroller and programmable with the Arduino IDE over USB, you can realize any wearable project with this compact and powerful board.

This is a collaboration with Arduino.cc and Adafruit. This product is for US Sales only! Use Arduino IDE 1.6.4 or higher for Arduino Gemma support!

The Arduino GEMMA is designed to be small enough to fit into any project and low cost enough to use without hesitation. Perfect for when you don't want to give up your Adafruit Flora board and cannot take apart a well-designed project. It is Adafruit and Arduino's lowest-cost sewable controller.

The Attiny85 offers 8K of flash, 512 bytes of SRAM and 512 bytes of EEPROM, with 5 I/O pins (including analog inputs and PWM outputs). The GEMMA has a USB bootloader, programmable over USB like an Arduino making it perfect for small and simple wearable electronics projects.

Note: GEMMA is not fully Arduino UNO compatible. It lacks a serial port for debugging, and some USB 3.0 ports may not recognize the board's bootloader—use USB 2.0 ports or hubs instead.

• Super small - 1.1" (28mm) diameter and 0.28" (7mm) thick
• Easy-to-sew or solder pads ideal for wearable projects
• Low cost for multiple uses in different projects
• ATtiny85 microcontroller with 8K flash, 512 byte SRAM, 512 byte EEPROM
• Internal 8MHz oscillator
• Ultra low power operation (9mA running current)
• USB bootloader with LED indicator, programmable from Arduino IDE
• Micro-USB jack for programming and power
• Rugged and foolproof bootloader process
• Approximately 5.25K bytes available for user code
• Onboard 3.3V regulator with 150mA output, supports up to 16V input with protection features
• Automatic power switchover between USB and external power
• Green power LED and red pin #1 indicator LED
• Reset button for bootloader entry or reset
• 3 GPIO pins with 1 analog input and 2 PWM outputs
• Hardware I2C support for sensors and breakout integration

Learn more and find tutorials at the Adafruit GEMMA Learn Guide.