new Daughterboard for RPi for Analog

Author designed an analog to digital daughter board for the RPi (only has GPIO…not analog) and documents his steps to create it.  Totaling up the parts in my head, I think getting an arduino to do the conversion would be cheaper.

http://hackaday.com/2013/03/22/analog-input-expansion-boards-for-raspberry-pi/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+hackaday%2FLgoM+%28Hack+a+Day%29

http://makersbox.blogspot.com/2013/01/using-circuitsio-to-cooks-up-something.html