This is a simple cable that adapts from a USB port to a 5.5x2.1mm barrel connector, center positive. This cable allows the user to use a USB port on a computer, laptop, or on our cigarette power supply to provide our development boards with 5V. The USB specification limits current consumption to a max of 500mA from a USB port but this is more than enough to run a simple development board. Cable length is 3 feet. https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2008-04-21 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2008-09-24 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2008-10-21 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2016-11-25 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2016-11-28 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2016-11-30 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2016-12-09 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2016-12-13 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2017-11-24 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2017-11-28 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2018-05-05 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2018-11-21 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2018-11-27 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2019-05-25 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2022-02-22 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2025-04-12 https://elecena.pl/product/634309/barrel-jack-adapter-usb-to-5-5mm 2025-04-14