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  • Little help :D

    i need a simple metal detector that can detect metal cube (10cm*10cm*10cm) buried 20cm underground
    any ideas ?!

  • #2
    Hi eessoo
    ****any metal detector can detect metal 10cmx3 cube at 20cm**** .
    simple:-two they could detect the 1Liter spray to approximately 60cm.
    1-Surf PI.
    2-BARACUDA .
    There is enough information about each I hope read before you start.
    best time
    j.

    Comment


    • #3
      can u send me the PCB design ?

      Comment


      • #4
        read

        Hi eessoo
        There is enough information about each**** you must**** read before you start.
        1-Surf PI. pcb in page 11.
        2-BARACUDA .pcb in page 2.
        best time
        j.

        Comment


        • #5
          please have a look at this circuit and tell me if it works

          Parts list:

          Resistors:

          R1, R10, R22, R35: 100kΩ
          R2: 3.3kΩ
          R3, R7, R8, R13, R14, R21, R33: 1kΩ
          R4, R5: 100Ω
          R6: 220Ω 1/2 W
          R9: 1MΩ
          R11, R20, R23, R32: 22kΩ
          R12, R27: 10kΩ
          R15, R16, R17: 220kΩ
          R18: 47kΩ
          R26, R29: 51kΩ
          R28: 210kΩ
          R34: 150Ω
          R25: 50kΩ trim potentiometer
          R10: 100kΩ trim potentiometer
          R33: 1kΩ trim pot. (volume control)
          P1: 10kΩ potentiometer (THRESH)
          P2: 100kΩ potentiometer (DISC)
          Coil:

          Note: It's best to use the original Surfmaster coil for optimal performance, but you can experiment with different turns, wire gauge and coil diameters, shielding...
          A reasonable depth and sensitivity can be obtained with a 23cm diameter coil, 20 turns made with 0.5mm (24 gauge) standard copper enamel coated wire.
          Capacitors:

          C1: 22nF
          C2: 1000uF/25V electrolytic
          C3, C4, C8, C16: 100nF
          C5, C6, C7: 470nF
          C9, C10, C11, C12: 1nF
          C13, C14, C15: 220uF/10V electrolytic
          Transistors:

          Q1: 2N3906 (PNP silicon transistor)
          Q2: TIP32C (PNP silicon power transistor)
          Q6: MPSA13 (NPN Darlington transistor)
          Diodes:

          D1, D2, D3: 1N4148 (Switching diodes)
          D6: 1N4001 (Rectifier diode)
          D7: 1N5819 (Schottky Barrier Rectifier)
          D5: 1N755 (7.5V Zener diode)
          Integrated circuits:

          U1: TLC555 (LinCMOS timer IC)
          U2: NE5534 (Single Low Noise Op Amp)
          U3: LM358 (Low Power Dual Op Amp)
          U4: MC14093B (Quad Schmitt trigger)
          U5: 78L05 (5V Positive Voltage Regulator)
          U6: ICL7660 (CMOS switched-capacitor voltage converter)
          U7: CD4066 (Quad Bilateral Switch)
          Attached Files

          Comment


          • #6
            what are these components (marked on the pic)?
            Attached Files

            Comment


            • #7
              PCB
              Attached Files

              Comment


              • #8
                This board is labled.
                Attached Files

                Comment


                • #9
                  Re

                  Hi eessoo
                  There is enough information about each**** you must**** read before you start.
                  An good choice FOR 1-Surf PI.
                  I advise you to do pcb in page 11 it is working from the first experiment.
                  The same Parts list except for the Q2: TIP32C =IRF9640
                  best time
                  j.

                  Comment


                  • #10
                    Originally posted by jap View Post
                    Hi eessoo
                    There is enough information about each**** you must**** read before you start.
                    An good choice FOR 1-Surf PI.
                    I advise you to do pcb in page 11 it is working from the first experiment.
                    The same Parts list except for the Q2: TIP32C =IRF9640
                    best time
                    j.
                    where is this page 11?!
                    can u post the link?

                    Comment


                    • #11
                      Hi eessoo
                      **** you must**** read all bages before you start.
                      Whites Surf PI schematic
                      http://174.132.129.189/~moreland/for...=13810&page=11
                      by oxygen007m
                      best time
                      j.

                      Comment


                      • #12
                        Originally posted by jap View Post
                        Hi eessoo
                        **** you must**** read all bages before you start.
                        Whites Surf PI schematic
                        http://174.132.129.189/~moreland/for...=13810&page=11
                        by oxygen007m
                        best time
                        j.
                        thanks

                        Comment


                        • #13
                          the Folder surf_pi_gerber_out.zip
                          the files inside are .file how do u open them?
                          i tried cam350 but it doesn't work

                          Comment


                          • #14
                            Hi eessoo
                            There is enough information about Whites Surf PI schematic**** you must**** read before you start.
                            -use any GerbView program.
                            best time
                            j.

                            Comment


                            • #15
                              where are the ( CD4066,TLC555 )?
                              are u sure they are the same components?
                              Attached Files

                              Comment

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