magnetic switches

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  • p webster
    • Apr 2012
    • 39
    #1

    magnetic switches

    Does anyone know of a supplier of magnetic reed switch and relay assemblies suitable for switching on the complete system of the sub (ie main battery and receiver battery.
    I am also looking at using 3 x 2v 8amp Cyclon batteries instead of the recommended 6v 12amp SLA battery. Except for the reduced running time can anyone see any other problems this could cause?
    Tags: None
    • KevinMC
      SubCommittee Member
      • Sep 2005
      • 463
      #2
      Re: magnetic switches

      Hi,

      I might have something for you. Please check your PM
      Kevin McLeod - OSCAR II driver
      KMc Designs

        Comment

        • ober freak
          Junior Member
          • Jan 2014
          • 114
          #3
          Re: magnetic switches

          I use these Relays,
          1 in my Seawolf and 2 in parallel in my U47, with one reed contact per coil.
          Never had any problems with them.

            Comment

            • johnredearth
              SubCommittee Vendor Member
              • Dec 2012
              • 47
              #4
              Re: magnetic switches

              Get door switches off ebay. $1.50 each. Add a couple of relays and you have the perfect thing.

                Comment

                • sam reichart
                  Past President
                  • Feb 2003
                  • 1325
                  #5
                  Re: magnetic switches

                  Don Spielberger used to build and sell them. (Loyalhanna Dockyard...)

                    Comment

                    • pedro gomez
                      • Sep 2007
                      • 91
                      #6
                      Re: magnetic switches

                      Engel modellbau has, and Norbert Bruggen Modellubootspezialitaten too.

                        Comment

                        • Guest
                          #7
                          Re: magnetic switches

                          Reed switches can be found very inexpensively on ebay. You want a pair of normally open type often abbreviated to 'NO'.

                          For a relay, you require a bistable unit. These can be a little trickier to find, but are available. You should aim to get one with voltage coils similar to your system voltage.

                          If you want to switch very high currents you can have the relay contact(s) pick-up the gate of a P-channel Mosfet to switch the load, or perhaps switch the low side with an N-channel Mosfet (anyone tried that?). To switch the high side with an N-channel you would need a driver chip to raise the gate about 10 volts.

                            Comment

                            • johnredearth
                              SubCommittee Vendor Member
                              • Dec 2012
                              • 47
                              #8
                              Re: magnetic switches

                              For relays, check these out. Fabulous build quality, very very cheap

                              http://www.ebay.com.au/itm/131164167875 ... 1497.l2649

                              I have just installed one of these with a door switich on a surface boat!

                              Cheers

                              John

                                Comment

                                • johnredearth
                                  SubCommittee Vendor Member
                                  • Dec 2012
                                  • 47
                                  #9
                                  Re: magnetic switches

                                  whoops I forgot I have something on this

                                  http://youtu.be/vVN4Aen0LLk


                                  John

                                    Comment

                                    • scott t
                                      Member
                                      • Feb 2003
                                      • 880
                                      #10
                                      Re: magnetic switches

                                      Nice sub video John.
                                      http://www.youtube.com/watch?v=rlu-y9pGIqc

                                        Comment

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