Small footprint Bluetooth-enabled Arduino clones

Just a bit of online research on a small footprint Bluetooth-enabled Arduino clone for prototyping:


Simple ATTiny85 USB board

IMG_20140623_121908_fixI needed to create a small, cheap USB-enabled circuit to serve as a key logger, and I've found some nice projects online that explain how to do this.
I found out you could use an ATTiny85 to run the V-USB software USB stack, and I only needed the one input pin to gather data (it's going to be a USB "That was easy" button).
Since this was done so many times before, I will be brief, and try to point out problems I had instead of a regular tutorial.
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Bootloading an ATmega88 for Arduino [w/ code]

Just wanted to put up a small tut on how to put an Arduino bootloader on an ATmega88.

I very roughly followed:
And (Although they make it way too complicated)
And ATMEL's datasheet for ATmega88 is also very good to have open at all times:

First, put everything on a breadboard: (This took me a while... Thanks D.Mellis and M.Feldmeier!!)

(Fritzing is awesome)
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