"you would likely be better off to use a linear array of complete individual small detectors to accomplish what you want."
Thanks for the advice there that is where ill go next. There definitely is a lot to be gleaned and time saved by browsing through patents. I think i will try and multiplex 2...
Thanks for your reply VE1BLL, I think it would be easier to used a group of smaller coils cycled/phaseed to avoid interference,
any ideas on a circuit that can sample multiple antennas at high speed? (the coil frequencies are generally 5khz-75khz)
Thanks Again
Hello, I am designing a metal detector coil for a project: it is long/narrow, perhaps up to 2 meters in length.
Here is the problem - How can the detection depth be kept uniform across the whole length, and detect at no more than 30-40 cm deep. Is the best approach to use lots of smaller DD...