Attiny85 Arduino Micro Development Board

The ATtiny85 based mini development board is similar to the Arduino, but cheaper and smaller (of course a bit less powerful). Through the whole host of shields to extend its functionality and the ability to use the familiar Arduino IDE, this board is a great way to jump into microcontroller electronics.

Features:

• 8KB program memory (~2KB is used by bootloader)
• 512 byte EEPROM
• 512 byte SRAM
• Internal USB support
• 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)
• PWM on 3 pins (more possible with Software PWM)
• ADC on 4 pins
• I2C and SPI (via USI)
• Power LED and Test/Status LED
• Power via USB or External Source - 5v or 7-16v (automatic selection)
• On-board 150ma 5V Regulator
  
• Low-power consumption

Documents:

• ATtiny85 datasheet
• Required files for Arduino IDE support