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Need help figuring out polarity

Discussion in 'Burnt Fingers DIY Effects' started by gitlvr, Feb 25, 2021.

  1. gitlvr

    gitlvr Friend of Leo's

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    Hi, I am currently powering my pedals with a Boss PSM-5 Power Supply and Master Switch. It works well, but takes up a pedal space on my board.
    IMG_3719.JPG
    I want to replace it with this.
    IMG_3714.JPG
    It is a 1 Spot I got from my brother. He modified it to run two pedals without a daisy chain.
    The Boss power supply I'm using has the plug that you normally plug into a pedal, in other words the end does not look like this.
    IMG_3714.JPG
    I want to take that cable you see, cut the other end off, and wire it into the 1 spot so I can connect it to the Boss daisy chain, instead of buying another daisy chain.
    I have a meter, I just need to make sure I wire it center negative.
    Any help would be appreciated.
     

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  2. Killing Floor

    Killing Floor Tele-Afflicted

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    upload_2021-2-25_11-45-24.png You’re probably looking for something like this. Reverse polarity adapter. Right? Center neg to center pos?
    It’s easy to find these.
    Screen shot.
    upload_2021-2-25_11-45-24.png
     
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  3. northernguitar

    northernguitar Friend of Leo's

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    Less invasive, no worries about reversing it.
     
  4. gitlvr

    gitlvr Friend of Leo's

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    No, I want t wire a different type of plug onto the end of the 1 Spot and don't want to wire it backwards. I want t keep the same polarity, just wire in a different plug.
     
  5. MatsEriksson

    MatsEriksson Tele-Afflicted

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    Then, why do you need to figure out polarity as the headline said?
     
  6. telemnemonics

    telemnemonics Telefied Ad Free Member

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    This is the connector cable visual sound makes.

    BC98902F-B50B-4914-8132-8020B6E20028.jpeg
     
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  7. gitlvr

    gitlvr Friend of Leo's

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    I need to be able to tell if the two wires from the 1 spot and the two wires from the plug I'm wiring to them will be wired so that the polarity remains the same, and I do not accidentally reverse the polarity. Surely this is not difficult to understand?
     
  8. gitlvr

    gitlvr Friend of Leo's

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    Yes, as I said in my OP, that plug was changed out by my brother(deceased) to something else. I need to change it back.
     
  9. BorderRadio

    BorderRadio Doctor of Teleocity Silver Supporter

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    It’s not all that clear but I think I understand.

    Does the one spot have a portion of the original cable intact? Looks like it does to me. The cable should be coded. A dashed line is indicative of....

    Hold on i have one somewhere. Gonna check.
     
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  10. telemnemonics

    telemnemonics Telefied Ad Free Member

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    My old one spot wall warts do have a ridge on one side of the cable but no reference as to polarity or as to which side connects where in the molded plug on the end.

    A multi meter is cheap and handy, harbor freight or HD sells them and that would allow you to test the polarity.
     
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  11. telemnemonics

    telemnemonics Telefied Ad Free Member

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    Or wire it up and see if a pedal works.
    Reversed polarity won't hurt the pedal, just wont function.
     
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  12. gitlvr

    gitlvr Friend of Leo's

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    Thanks. I just wired it one way, then the other. Got it sorted. Appreciate it
     
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  13. BorderRadio

    BorderRadio Doctor of Teleocity Silver Supporter

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    Just for the archive, the text side of the wire is the center, or (-) lead. The ribbed wire is the barrel, or (+) lead.
     
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  14. gitlvr

    gitlvr Friend of Leo's

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    Thank you to everyone who tried to help. It is greatly appreciated.
     
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  15. Boreas

    Boreas Friend of Leo's Silver Supporter

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    The confounder is some pedals use reverse polarity, which is where the above adapter comes in handy. But I never stray far from my multi-meter. I don't always know what it means, but I believe what it says.
     
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  16. gitlvr

    gitlvr Friend of Leo's

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    Yep, I have that adapter, as I have an old MXR comp that needs it on my board.
     
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