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One common 12 V DC power connector is the "2.1 mm plug": 2.1mm inner diameter, 5.5mm outer diameter. Jameco says it is one of the most common DC power connector. Several Sparkfun power connecto...
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#1: Initial revision
by
DavidCary
·
2021-09-30T04:33:42Z (about 3 years ago)
One common 12 V [DC power connector](https://en.wikipedia.org/wiki/DC_connector) is the "2.1 mm plug": 2.1mm inner diameter, 5.5mm outer diameter. [Jameco](https://www.jameco.com/Jameco/content/walladapter.html) says it is one of the most common DC power connector. Several [Sparkfun power connectors](https://www.sparkfun.com/categories/387) are 2.1 mm plug compatible. Several [Adafruit power connectors](https://www.adafruit.com/category/157) are 2.1 mm plug compatible. Many devices, including some [GoTo telescope mounts](https://www.cloudynights.com/topic/715177-why-some-55x20mm-power-plugs-dont-fit-ioptron-mounts/), many [CCTV cameras](https://www.cctvforum.com/topic/20687-cctv-power-jack-adapter-wiring-standard/), the [power socket on Arduino boards](https://learn.adafruit.com/ladyadas-learn-arduino-lesson-number-0/power-jack-and-supply), etc. are 2.1 mm plug compatible. (Like most devices powered with barrel connectors, they require Tip Positive, and a range of voltages that includes 12 VDC).