How to Build USB-Powered Christmas Lights
If you have an unused USB port on your computer you can put it to good use and add a touch of flair to your workspace.
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Get all your questions about Christmas trees and Christmas decorations answered, and pick up a few new tricks, in this Howcast video series.
You Will Need
- USB connector cable
- Scissors
- Wire strippers
- Soldering iron and solder
- Strand of Christmas lights with a 5-volt, battery-operated power supply
- Electrical tape
- Multimeter (optional)
Steps
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Working with electricity is very dangerous. Completely disconnect your computer from electrical outlets before you begin. If you have any doubts, contact a professional.
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Step 1
Strip USB cable
Cut the USB cable and strip a small section of the outer sheath to expose the red and black wires inside.
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Cut back and ignore the data and grounding wires -- they won't be needed.
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Step 2
Prepare lights
Unpack the Christmas lights and cut off the battery pack. Strip the sheathing to expose a small portion of the wires.
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Step 3
Match red and black wires
Locate and match up the positive-charge red wires and the negative-charge black wires on the string of lights and the USB cable.
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Use a multimeter, an electronic measuring device, to make sure you are matching up the wires correctly.
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Step 4
Solder
Use your soldering iron to connect the two sets of wires.
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If you don't have a soldering iron, you can twist the wires together and wrap them with electrical tape.
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Step 5
Wrap wires
Wrap a piece of electrical tape around the bundle of wires for protection.
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Step 6
Plug in and turn on
Plug the USB-powered lights into your computer. Now you have mood lighting for the holidays or any time of year.
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In 1882, Thomas Jefferson's associate, Edward Johnson, became the first person to electrically light a Christmas tree.
