Adafruit
MicroUSB Plug to 5.5/2.1mm DC Barrel Jack Adapter
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This adapter cable converts a 5.5mm/2.1mm DC barrel jack power supply to a Micro USB plug, allowing you to power Micro USB devices from a standard barrel jac...
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This adapter cable converts a 5.5mm/2.1mm DC barrel jack power supply to a Micro USB plug, allowing you to power Micro USB devices from a standard barrel jack power adapter. The barrel jack end is centre-positive polarity.
It works great for powering Arduinos, BeagleBones, Raspberry Pis, Android devices, and most other USB-powered gadgets from a 5V barrel jack supply. Since there are no resistors on the data lines, it won't work for charging devices that require D+/D− resistance (such as iPhones or iPads).
Specifications
- Input: 5.5mm/2.1mm DC barrel jack (centre positive)
- Output: Micro USB plug
- Type: Power only (no data line resistors)
Ideal For
- Powering Raspberry Pi, Arduino, and BeagleBone from barrel jack supplies
- Connecting 5V DC adapters to Micro USB devices
- Workbench and project power setups
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.
- DC barrel jack
- A round power connector commonly used for low-voltage DC power supplies, often described by its outer and inner diameters such as 5.5 x 2.1 mm. Matching the barrel size and polarity is important so the plug physically fits and powers the device correctly.
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