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dc internet controlled 12v relays?

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  • dc internet controlled 12v relays?

    I've seen a board on ebay that controls ac devices, but is there one that does dc relay control?

    economically, e.g. not zigbee stuff?

  • #2
    Fusion Brain
    Have you looked in the FAQ yet?
    How about the Wiki?



    Under normal circumstances, a signature would go here.

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    • #3
      a vague question usually gets a vague response..

      what about this:
      http://www.hw-group.com/products/ip_...elay_L_800.jpg
      My OLD 2001 Mitsubishi Eclipse GT:
      "The Project That Never Ended, until it did"


      next project? subaru brz
      carpc undecided

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      • #4
        Originally posted by soundman98 View Post
        a vague question usually gets a vague response..

        what about this:
        http://www.hw-group.com/products/ip_...elay_L_800.jpg
        I want a computer in the car that can run ecu diagnostics, but at the same time I want to be able to interface it with something like this, http://cgi.ebay.com/ws/eBayISAPI.dll...#ht_1161wt_754

        I had seen one on ebay a while back that had a web interface, so in theory, I could hook up something like a mifi and query/power cycle the computer from anywhere that had an internet connection.

        but it needs to be 12v so i can run and switch stuff in the car.

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        • #5
          As long as the relays are rated for the current you require at 12V.

          If not, you could change the relays.


          And if you have a car PC, that can control anything.

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          • #6
            Originally posted by OldSpark View Post
            As long as the relays are rated for the current you require at 12V.

            If not, you could change the relays.


            And if you have a car PC, that can control anything.
            I'm more concerned about a remote reset, I'm planning on possibly a fitpc2i, but if It freezes and cannot be queried, it does no good. hence the desire for an internet accessible on off switch.

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            • #7
              Don't forget a firewall LOL!

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              • #8
                Originally posted by OldSpark View Post
                Don't forget a firewall LOL!
                haha, if someone really wants to hack my car, I guess they can.

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                • #9
                  something like this?
                  http://cgi.ebay.com/ws/eBayISAPI.dll...RK:MESINDXX:IT

                  And if you need higher current, like a starter relay for an example, you could piggy back 2 relays, no?

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                  • #10
                    Wow! Ancient technology.

                    But no-one would hack RS232... how could they?

                    (LOL!)


                    But yes to piggy backing relays, provided it is understood that is tandem - not parallel.
                    EG to boost any relay output, have it control another relay.
                    EG - to control a 400A load, use a 500A relay which is energised by your 2A switch, or 10A MW728 low-voltage disconnect, or your 80A battery-isolator smart switch (ie, a boosted $20 MW728; almost).
                    (Parallel switching to handle loads (as opposed to redundancy) can be problematic - even dangerous. And redundancy without alarms or inspection is merely a delayed failure.)

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                    • #11
                      why not go via DTMF tones? you can get devices that use a mobile network and all you do is put a sim card in and call it from any phone anywhere in the world. then when you push the keys they send a tone to the receiver in the car and each done does a different relay.

                      i am planning to have something similar in my car as an override

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                      • #12
                        like this:

                        http://cgi.ebay.co.uk/7-Switch-GSM-R...item2eb0af2964

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                        • #13
                          Originally posted by inline4 View Post
                          I'm more concerned about a remote reset, I'm planning on possibly a fitpc2i, but if It freezes and cannot be queried, it does no good. hence the desire for an internet accessible on off switch.
                          Watchdog timer?

                          But it is a car. So what if it hangs - you'll be there soon anyhow.
                          Otherwise just local comms - IR, radio etc.


                          I think the original idea & hardware looks good.

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