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Thread: 2.1mm Barrel Connector. Wire has 'white' dash lines (is that Positive or Negative v)?

  1. #1
    Pilot
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    2.1mm Barrel Connector. Wire has 'white' dash lines (is that Positive or Negative v)?

    I know the 2.1 barrel inside is (v+), but the two wires are not labled
    and cannot find my ohm meter.

    The wire with the 'white' dash lines is (+) or (-)?

    Thanks

    http://www.readymaderc.com/store/ind...roducts_id=467
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    "On My best behavior, or I'll get Banned".....
    .....I love Sports' and Vacations,....
    Whos' more Athletic? NHL players or Football/Basketball Skills' Players?

    "...I break regulations because I'm good and it's ok for me..."

  2. #2
    I see you... Derrick's Avatar
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    Break out your multi-meter and do a continuity test to verify.

    a 9 volt battery works well as a multi-meter... Hook one end to the wire and a terminal on the battery, and the other end to a wire touch your tongue to both leads, if you get a shock you have completed the circuit
    Last edited by Derrick; 14th July 2013 at 12:22 PM.
    When nothing else out there will suit your needs... design and build it yourself.

  3. #3
    Navigator spiked3's Avatar
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    I'm not sure which is worse; someone who is doing FPV without a multimeter handy, or someone replying and saying to get out a multimeter when the OP cleary said he did not have it?



    In my experience if only one of the wires is marked, it is almost always the positive side. In your case it is inside versus outside and you would be foolish to go on someone's guess. Find your multimeter, or buy a new one. They are like $2 Or just hook it up to 12v automobile battery, you'll know in about 1 second whether or not it was correct.

  4. #4
    GO HAWKS Hucker's Avatar
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    RCLab: make your own continuity tester with a light bulb, flashlight, LED strip etc. Connect everything up and use your barrel connector/wire in the circuit, connect one of the wires on one side and on the other touch the wire to the outside and inside of the barrel. The light will come on when you touch the right conductor. Sorry for the crappy explanation but if you can operate on people you should be able to figure it out
    KF7SKL,TechPod/Walrus/250mmQuad/HoneyBadger, EZUHF,SL-AAT, 1G3/2G4/5G8

  5. #5
    Ouwe Zeikerd Carbon's Avatar
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    ^That's what I would have done. Marked usually means positive and it is usually the wire that goes to the inside of the connector. At least that's what I've found. I made a custom power lead for my RMRC receiver a while back..

  6. #6
    His Royal Sassiness ssassen's Avatar
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    Oh c'mon, you're a slacker! Go buy a DVM and learn how to use the continuity feature!
    Purveyor of the FPV secret sauce at ImmersionRC

  7. #7
    I see you... Derrick's Avatar
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    personally I liked the 9v idea, I guess you can do it with LEDs, flashlights, or light bulbs too. the 9V is harmless, "Do Not Do this With a Car Battery or LiPo"
    When nothing else out there will suit your needs... design and build it yourself.

  8. #8
    GO HAWKS Hucker's Avatar
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    I like the 9v battery idea too, I had the window open and didn't post for a while.
    KF7SKL,TechPod/Walrus/250mmQuad/HoneyBadger, EZUHF,SL-AAT, 1G3/2G4/5G8

  9. #9
    Pilot
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    LOL....

    I found my multimeter....
    my multimeter says' that the dash-white-lines is the v+
    ....
    someone mentioned to use 9v battery and shock myself (tongue).
    Hahahaha LOL!
    A local Car Parts store recommended something like that to a customer over the phone.
    He got 'shocked' and came to my E.R. and 'malingered' .....
    He is suing that Car Parts Store?
    "On My best behavior, or I'll get Banned".....
    .....I love Sports' and Vacations,....
    Whos' more Athletic? NHL players or Football/Basketball Skills' Players?

    "...I break regulations because I'm good and it's ok for me..."

  10. #10
    Ouwe Zeikerd Carbon's Avatar
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    I've licked a 9v before. No issue...unless you're chicken..

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