Adafruit
5.5mm/2.1mm DC Barrel Polarity Reversing Cable
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$7.00
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A 5.5×2.1mm DC barrel polarity reversing cable that swaps centre-negative to centre-positive (or vice versa). Simply plug it inline between your DC power sup...
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A 5.5×2.1mm DC barrel polarity reversing cable that swaps centre-negative to centre-positive (or vice versa). Simply plug it inline between your DC power supply and device to reverse the polarity — no rewiring required.
This is useful for powering devices that use centre-negative barrel jacks (such as many guitar pedals and label printers) from standard centre-positive DC power supplies.
Specifications
- Connector Size – 5.5×2.1 mm DC barrel
- Function – Reverses DC polarity (centre-positive ↔ centre-negative)
- Connectors – Male plug to female jack (inline)
Ideal For
- Centre-negative guitar pedals and effects units
- Label printers and other centre-negative devices
- Using standard centre-positive power supplies with non-standard equipment
Package Contents
- 1× 5.5/2.1mm DC Barrel Polarity Reversing Cable
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
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