This standard sized DC barrel fits Arduino, Ardu32 and most other DC barrel inputs. You can use this pigtail to connect an Arduino to any DC power supply, such as a 12VDC deep cycle battery, solar panel, or more.
While typically a red positive wire is connected to the pin and a negative black wire is connected to the shield, you can flip these for some non-standard devices.
- Red is the center pin (almost always positive)
- Black is the shield (almost always negative)
- 2.1mm size (universal for most Arduinos and the Ardu32)
- 6 inches of pigtail
- Black and red wire are joined but can be pulled apart