Datasheet

ATtiny85 on-board, 8K of flash, 512 byte of SRAM, 512 bytes of EEPROM

Internal oscillator runs at 8MHz, but can be doubled in software for 16MHz

USB bootloader with a nice LED indicator looks just like a USBtinyISP so you can program it with AVRdude

(with a simple config modification) and/or the Arduino IDE (with a few simple config modifications)

Mini or Micro-B USB jack for power and/or USB uploading, you can put it in a box or tape it up and use any USB

cable for when you want to reprogram.

We really worked hard on the bootloader process to make it rugged and foolproof, this board wont up and die

on you in the middle of a project!

~5.25K bytes available for use (2.75K taken for the bootloader)

Available in both 3V and 5V flavors

On-board 3.3V or 5.0V power regulator with 150mA output capability and ultra-low dropout. Up to 16V input,

reverse-polarity protection, thermal and current-limit protection.

Power with either USB or external output (such as a battery) - it'll automatically switch over

On-board green power LED and red pin #1 LED

Reset button for entering the bootloader or restarting the program. No need to unplug/replug the board every

time you want to reset or update!

5 GPIO - 2 shared with the USB interface. The 3 independent IO pins have 1 analog input and 2 PWM output as

well. The 2 shared IO pins have 2 more analog inputs and one more PWM output.

Hardware I2C / SPI capability for breakout & sensor interfacing.

Mounting holes! Yeah!