The ATtiny45 and 85 are a couple of really cool little MCUs but did you know you can program them in Arduino? That's right, now you can shrink your Arduino projects down to "tiny size" by moving your code straight over to these small but capable ICs. The standard method for programming the ATtiny ICs involves a breadboard, lots of jumper wires and a hardware programmer, but David Mellis over at MIT Media Lab has simplified the process by laying out this handy USB programmer. Project description, more information and ordering can be found at https://www.sparkfun.com/products/11460 Board Definitions: https://github.com/damellis/attiny/tree/master/attiny USBTinyISP Driver: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/AVR/usbtinyisp w32 driver v1.12.zip USBTinyISP Driver: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/AVR/usbtinyisp_libusb-win32_1.2.1.0.zip Firmware: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/Arduino/Boards/firmware-final_TinyAVRProg.zip HLT Tutorial: http://hlt.media.mit.edu/?p=1801 GitHub Repo: https://github.com/sparkfun/Tiny-AVR-Programmer