Just saw this, thought I'd share...
http://hackaday.com/2012/02/23/autonomous-metal-detector-lets-you-sit-back-get-rich/#more-67843
or the link to the builder's site...
http://letsmakerobots.com/node/9928
Have watched the video (slow, dial-up), but this could start something.
http://hackaday.com/2012/02/23/autonomous-metal-detector-lets-you-sit-back-get-rich/#more-67843
or the link to the builder's site...
http://letsmakerobots.com/node/9928
Have watched the video (slow, dial-up), but this could start something.