This is a project from [Mirel] who built the system around a Arduino Mega 2560 and antipodal Vivaldi ... This can be very handy when starting a large excavation project, detecting rock layers ...

It’s a significant update. The Arduino UNO and Arduino Mega 2560 update the Duemilanove and Mega respectively. They now use an ATMega8U2 instead of an FTDI USB to serial converter chip.

If you are searching for a new project to keep you busy for the next couple of weekends you might be interested in this hexapod robot project powered by an Arduino Mega 2560 development board.