How to Power a Cold Cathode Through a USB

The universal serial bus (USB) protocol is a feature on many pieces of consumer electronics. Whether from your computer, laptop, gaming system, or even digital satellite box, USB's 5-volt output is useful for powering and charging external devices. Cold cathode lighting is one such option. Typically smaller in form factor, these small lights are ideal for illuminating a laptop keyboard or equipment rack.

Things You'll Need

• USB-enabled device
• Cold cathode USB light

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Instructions

1. • 1

     Locate the small, rectangular USB port on the equipped device. Note the tab inside the port, indicating jack orientation.

   • 2

     Slide the USB plug into the jack. Ensure the plug is inserted straight into the jack to avoid damaging the delicate internal pins or plastic orientation tab.

   • 3

     Allow the device to recognize the light and turn on the cold cathode light source.