Digispark Attiny85 USB microB Arduino Compatible
The Digispark is an Attiny85 based microcontroller development board similar to the Arduino line, only cheaper, smaller, and a bit less powerful. With a whole host of shields to extend its functionality and the ability to use the familiar Arduino IDE, the Digispark is a great way to jump into electronics, or perfect for when an Arduino is too big or too much. This version of the board comes with a USB micro B receptor so you do not need to connect it to your laptop's USB port directly. You can power it, load the program while using it.
Note: The Digispark is shipped fully assembled except for the two included and easy to solder headers.
Support for the Arduino IDE 1.0+ (OSX/Win/Linux)
Power via USB or External Source - 5V or 7-35VDC (12V or less recommended, automatic selection)
On-board 500ma 5V Regulator
Built-in USB
It comes with a USB micro B receptor, extendable with Android phone USB cable or USB micro B cable.
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)
8KB Flash Memory (about 6KB 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