VLF (Very low frequency) Circuit for Metal Detector Machine

Details and Conditions [login to view URL] Circuit which can find Metal (i.e Gold, Silver, Bronze, Jewellery, copper, treasure, iron etc) individually in depth 3-4 feet by showing numerical reading. 2. Circuit should have option for Maximize/Minimize volume and sensitivity , wireless BT for headphone, Battery rechargeable option, 3. In display, there should be mode according to Metal( for Instance; if we want to search iron, first click on iron mode then search....and mode for all metal search also.) 4. There should be option for On/Off for respective metal.( For Instance: if we don`t want to search silver metal, could be off that. 5. Circuit can find metal in all types of dusty soil, Rocky Minerals, sandy soil, sands also. 6. We have to use Coil (DD type) size 9 inch to 12 inch while detecting metal so circuit should be compatible according to that. NOTE:- If your project is fail, You will refund our fully given milestone.