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Probe coil for Baracuda pi?

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  • Probe coil for Baracuda pi?

    I ordered one of the kits for the Baracuda Pi from Silverdog. I am wondering if it would work with a small probe coil like a pin pointer. I figure I could use it with a cord and belt mount the control. I mostly plan on using this as a beach detector but thought this might also be a good use when not at the beach. If its possible then what would be the best design for such a coil. I am a beginner so please use small words Thanks

  • #2
    it certainly will work with a small coil

    you could wind a 2-4" coil or wind onto a ferrite rod
    as long as the coil inductance is similiar to the stated spec it will be fine

    remember though you will need to move the coil, the baracuda is a motion detector

    I made a small pinpointer with a ferrite rod http://www.youtube.com/watch?v=zq1JTMJmFjQ
    the same kind of thing would work ok

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    • #3
      Thanks thats great. Are any of the PI kits available no motion detectors? I might try one of them next. Or is there a mod to make the Baracuda no motion?

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      • #4
        I've yet to find a proven non-motion design

        with a ferrite rod you only need to wiggle it an inch or so each way so its not too bad

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        • #5
          Hi
          I didnt realize the baracuda was motion type, although never built ive got the bits pcb etc to build one apart from the transistors.
          The Minipulse3 project is non motion and works well , the draw back is wight and power consumption but yet to try a small pinpoint coil for it.
          Will try and let you know results.
          Regards
          Dave

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          • #6
            hello

            minipulse3 is too mch for a pinpointer
            try pulsdetektor boeses tier 1
            or surf pi with pinpoint mod
            i have made a tube /pinpointer coil for surf pi in motion mode
            http://www.youtube.com/watch?v=oaCyVGAuYX0

            this type will work similar for baracuda

            regards

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            • #7
              Originally posted by bernte_one View Post
              hello

              minipulse3 is too mch for a pinpointer
              try pulsdetektor boeses tier 1
              or surf pi with pinpoint mod
              i have made a tube /pinpointer coil for surf pi in motion mode
              http://www.youtube.com/watch?v=oaCyVGAuYX0

              this type will work similar for baracuda

              regards
              Thats quite impressive, and your MD build, Was that built round a core or just wound round a form?
              What was the specs?
              Well done

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              • #8
                hello satdaveuk

                coil is wound on pvc pipe 20mm or 25mm diameter
                cable is litz wire the type which lays around here for wiring my potentiometer 0,125 or 0,25mm2
                100turns from middle to top and around 50turns back but same direction of winding
                core is a round ferrit 8mm dia lenght 70mm
                inductivity is higher then normal 20cm coil (normal is something around 300microH)
                tube coil has 600+
                by pushing and pulling the core i can change inductivity (and so the sens) rapidly
                core is moveable
                but when you only whant strongest settings you can adjust it with glue

                regards

                Comment


                • #9
                  Originally posted by bernte_one View Post
                  hello satdaveuk

                  coil is wound on pvc pipe 20mm or 25mm diameter
                  cable is litz wire the type which lays around here for wiring my potentiometer 0,125 or 0,25mm2
                  100turns from middle to top and around 50turns back but same direction of winding
                  core is a round ferrit 8mm dia lenght 70mm
                  inductivity is higher then normal 20cm coil (normal is something around 300microH)
                  tube coil has 600+
                  by pushing and pulling the core i can change inductivity (and so the sens) rapidly
                  core is moveable
                  but when you only whant strongest settings you can adjust it with glue

                  regards
                  Is that jumble wired or got to be evenly spaced like on most am radios

                  Comment


                  • #10
                    hello

                    wire is wound helical around the pvc pipe
                    every turn close to each other
                    some picture and ideas in this thread
                    http://www.geotech1.com/forums/showt...ght=coil+probe

                    regards

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