Akkana Peck has submitted her Arduino-based sonar echolocation rig:

Sonar / Echolocation with an Arduino

http://shallowsky.com/blog/hardware/sonarduino.html

It’s developed on Ubuntu, using Ubuntu/Debian packages I documented here:

Command-line Arduino development: http://shallowsky.com/software/arduino/arduino-cmdline.html

Thanks to Akkana for being our third participant in the Ubuntu Women Month of Making! Please visit the wiki page or read the announcement for more information about this competition. Entries are to be sent to competition at ubuntu-women.org and the deadline is October 7th extended to October 14th!