Support for the IDE 1.0+ (OSX/Win/Linux). Power via USB or External Source - 5v or 7-35v (automatic selection). On-board 500ma 5V Regulator. Built-in USB (and serial debugging). 6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB). 8k Flash Memory (about 6k after bootloader). I2C and SPI (vis USI). PWM on 3 pins (more possible with Software PWM). ADC on 4 pins. Power LED and Test/Status LED (on Pin0). Size: 1.8cm x 2.6cm .
Digispark Kickstarter ATTINY85 General USB Development Board