Presentation

The Adafruit GEMMA map is a smaller version of the map Adafruit FLORA, with only 28 mm in diameter.

It is compatible with the Arduino IDE, and it is directly programmable thanks to its micro-USB port.

Adding a switch ON / OFF with the v2 and micro-USB connectors.

It is possible to weld the Adafruit GEMMA pines, but also sew them with wire to create clothes that are connected.

Features

• Micro-controller: ATTiny85
• Nominal supply voltage: 5V
• Consumption: 9mA
• GPIO:. 3 including 2 PWM and able 1 analog acquisition
• Possibility of acquiring I2C/SPI
• Flash memory: 8 KB including 2.75 KB for the bootloader
• SRAM: 512 B
• EEPROM: 512 B
• Clock frequency: 8 MHz
• Connectivity: MicroUSB 

Documentation

Documentation Adafruit GEMMA: http://learn.adafruit.com/introducing-Gemma/introduction

Datasheet of the ATMEL ATTiny 85: http://www.Atmel.com/devices/attiny85.aspx