For ref from the KS Pages
KS PRO The Specs:
•Compatible with Arduino IDE 1.5 (OSX/Win/Linux)
•Fully signed drivers and executable for easy installation
•USB programming, USB device emulation, USB-CDC virtual serial port emulation
•16 Mhz AVR MCU - using a true 16Mhz precision crystal
•16KB Flash Memory (14.5K+ after bootloader)
• Serial over USB debugging and communication!
• 14 i/o Pins (2 shared with USB)
•I2C, true SPI, UART, LIN, and USI
•ADC on 10 pins
•3 PWM Channels (which can be assigned to a selection of pins)
•Power via USB, or External Source - 5v or 6-16v (automatic selection)
•On-board button that can be used as a reset, program, or user button - or can be disabled to use that pin as general i/o - without changing the bootloader
•On-board 500ma 5V regulator
•Power LED and Test/Status LED (on Pin 1)
•User accessible solder jumpers to disable LEDs, and other features for lower power consumption
•Two mounting holes.
•Breadboard compatible pin out/spacing (the three side header pins are only for legacy shield support).
https://www.kickstarter.com/projects/digistump/digispark-pro-tiny-arduino-ready-mobile-and-usb-de/descriptionKS ORIGINAL The Specs:
•Support for the Arduino 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)
https://www.kickstarter.com/projects/digistump/digispark-the-tiny-arduino-enabled-usb-dev-board/description