Arduino ATTiny85 USB Digispark is the smallest version of Arduino currently developed by DigiSpark based on the ATTiny85 MCU platform with the ability to directly connect to a computer via USB for program uploading. The board has the same usage and programming capabilities as previous Arduino versions such as Arduino Uno, Nano, Mega 2560, etc. It has a compact size (about the size of a thumb), high flexibility, and USB communication. Arduino ATTiny85 USB Digispark is a suitable choice for various applications.
SPECIFICATIONS
Main microcontroller: ATTiny85.
Firmware: Arduino ATTiny85 USB Digispark.
Operating voltage: 5VDC from USB port or 6~12VDC from Vin pin.
Support for the Arduino IDE 1.0+ (OSX/Win/Linux).
On-board 500ma 5V Regulator.
Built-in USB.
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 (via USI).
PWM on 3 pins (more possible with Software PWM).
ADC on 4 pins.
Power LED and Test/Status LED.