USB Null Power Supply

One time I read an Nuts and volts article where this guy took a usb cord and unhooked the +5v(red wire) and made it where the arduino can be powered by an external power supply without breaking anything.. This can be also handy for power hungry devices(such as external dvd burners,etc). This will draw nothing on the computer.

Schematic Diagram Left side is the computer Right side is the USB device

Parts list

1x USB Extension Cord

cheap heatshrink assortment

Published by Justin Roeder

I am an electronics engineer and computer programmer that has autism. I learned by myself

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