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Thread: Switchable Power for OBD Sensors

  1. #1
    Constant Bitrate
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    Switchable Power for OBD Sensors

    I would like to develop a manual (i.e toggle switch) and automated (i.e fusion brain) power controller for OBD sensors. I have found that one of the biggest drawbacks to using integrated OBD software and a car PC is the power drain by leaving the OBD sensor connected.

    I plan to use :
    http://www.scantool.net/accessories/...1962f-5ft.html

    Along with a fusion brain as well as the manual option to allow me to keep the cable connected but turn it on or off without it draining the battery.

    Once I have all the wiring figured out and pin outs I would publish it up so the community could create they own to augment their car pcs.

    I would like the fusion brain and the cable as part of the grant if possible

    Questions or thoughts?

  2. #2
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    oddly enough, my buddy steve already has a working prototype of such a device.

    just having occasional problems with a relay. didn't need a fusionbrain. just plugs between the obd2 port and the obdlink device.

  3. #3
    Mod - all of it.
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    OBDPros now sell a device that powers down when the computer powers off. $85 and an option to make it bluetooth for additional $$
    CAR: 2007 G35 Sport Coupe 5AT
    HARDWARE: Dell D630 w/ dock, internal 80G HD, internal 320G HD, Verizon Wireless Card, iBlue GM-2 GPS w/iGuidance, OBDPros w/DashCommand, Visteon HD Radio w/ Home Made Cable, Current Version of RR w/ DFX Skin. My Install.

  4. #4
    Constant Bitrate
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    The obdpro one is nice but it would require us to buy a new scanner. I want something as an add on to the obi tool that Is already owned. Plus as with everything in this hobby I would love to see something not cost $60+

  5. #5
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    Yes, as mentioned above I have a working prototype. This is a really simple device, not to put down the idea but it is not really necissary to connect any kind of a "brain" to this circuit. With a little luck and a radio shac you can make one for like 20$. Ill post some pics and a description later.

  6. #6
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    I did not really need the brain, just to have it turn off. I thought it would be cool to be able to turn it on and off from the front end. I would love to see the pics and description.

  7. #7
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    Quote Originally Posted by obstacleman View Post
    I did not really need the brain, just to have it turn off. I thought it would be cool to be able to turn it on and off from the front end. I would love to see the pics and description.
    uglymonkey aka steve told me last night that he'd take a pic and give a basic description of the device.


    soooo stay tuned.

  8. #8
    Constant Bitrate
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    This should be easy...Get a relay(s) and route the OBD lines barring ground through the relay contacts and just energize the relay using ACC line.

    Edit: On second thoughts, instead of switching all the lines, It may just be a bit easier to switch just the +12V line from the OBD port going to the OBD Scanner but I havent tried any of it yet.

  9. #9
    Mod - all of it.
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    Pair16 is the power, so you would just need a relay to break that connection and you would be good to go.
    Attached Images Attached Images  
    CAR: 2007 G35 Sport Coupe 5AT
    HARDWARE: Dell D630 w/ dock, internal 80G HD, internal 320G HD, Verizon Wireless Card, iBlue GM-2 GPS w/iGuidance, OBDPros w/DashCommand, Visteon HD Radio w/ Home Made Cable, Current Version of RR w/ DFX Skin. My Install.

  10. #10
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    Here is a pic of the prototype Ive been working on.

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