I'm trying to understand the polarity requirements for guitar pedals and specifically at present the Gamechanger Audio light pedal. Their own website states:
Gamechanger Audio LIGHT Pedal requires a standard pedal power supply – Barrel plug – 2.1 x 5.5 mm with a center-negative polarity with 9V DC and at least 500 mA.
But the picture on the back of the pedal shows this:
Which looks to me like centre - positive, unless I've misunderstood something. All my other pedals don't have anything on them to indicate a required polarity.
The two pedal power supplies I own both show plus - centre - negative on them.
Guitar pedal power supply and polarity
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Re: Guitar pedal power supply and polarity
Ah ok maybe I'm misunderstanding then. Going off this page about polarity, the images on the right seem to say that the symbol on the light pedal is centre positive.
https://en.wikipedia.org/wiki/Polarity_symbols
Re: Guitar pedal power supply and polarity
Well, the diagram shows the center negative . Momentary dyslexia attack?
- resistorman
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Re: Guitar pedal power supply and polarity
Will_m wrote: ↑Sun Dec 05, 2021 6:28 pm
Ah ok maybe I'm misunderstanding then. Going off this page about polarity, the images on the right seem to say that the symbol on the light pedal is centre positive.
https://en.wikipedia.org/wiki/Polarity_symbols
Actually, they show the same thing as the pedal. Just on the other side. The little dot in the middle represents the center terminal.
- resistorman
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Re: Guitar pedal power supply and polarity
Ok, I think I've been reading it entirely wrong. So its whether the positive or negative connects to the centre dot and not the order of the symbols?
So the symbol on the image of the light pedal is centre negative but just happens to show a different left to right order to the one on the wikipedia page?
So the symbol on the image of the light pedal is centre negative but just happens to show a different left to right order to the one on the wikipedia page?
Re: Guitar pedal power supply and polarity
Exactly. However the wikipedia wording is vary bad and suggests the orientation is significant - it isn't. The only thing that matters is which symbol goes to the centre dot.
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Re: Guitar pedal power supply and polarity
Re: Guitar pedal power supply and polarity
If you're looking for replacements or spares try myvolts.co.uk
Just tell them what it's for & they'll source it or manufacture it as appropriate. I got a replacement for the scrawny undersized one supplied by Line6. Quality stuff but they're not what you'd call quick. They can also add an inline switch which is great if the socket is under the desk or behind the sofa.
Just tell them what it's for & they'll source it or manufacture it as appropriate. I got a replacement for the scrawny undersized one supplied by Line6. Quality stuff but they're not what you'd call quick. They can also add an inline switch which is great if the socket is under the desk or behind the sofa.
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- Dynamic Mike
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Re: Guitar pedal power supply and polarity
Dynamic Mike wrote: ↑Mon Dec 06, 2021 12:58 am If you're looking for replacements or spares try myvolts.co.uk
Just tell them what it's for & they'll source it or manufacture it as appropriate. I got a replacement for the scrawny undersized one supplied by Line6. Quality stuff but they're not what you'd call quick. They can also add an inline switch which is great if the socket is under the desk or behind the sofa.
Thanks! looks like a useful site.