Adafruit Gemma - Miniature Wearable Arduino-like Electronic Platform

The Attiny85 is a fun processor because despite being so small, it has 8K of flash, and 5 I/O pins, including analog inputs and PWM 'analog' outputs.We designed a USB bootloader so you can plug it into any computer and reprogram it over a USB port just like an Arduino (it uses 2 of the 5 I/O pins, leaving you with 3).In fact we even made some simple modifications to the Arduino IDE so that it works like a mini-Flora.Perfect for small & simple projects the GEMMA will be your go-to wearable electronics platform.Even though you can program GEMMA using the Arduino IDE, it's not a fully 100% Arduino-compatible.There are some things you trade off for such a small and low cost microcontroller! GEMMA does not have a Serial port connection for debugging so the serial port monitor will not be able to send/receive data Some computers' USB v3 ports don't recognize the GEMMAs bootloader.Simply use a USB v2 port or a USB hub in between We do not have full Windows 8 driver compatibility d.At this time we only have it working with Mac, Linux or Windows 7/XP