Instructables
Picture of How to Build a USB Powered LED Light
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The following instructable will walk you through the procedures to make your own USB powered LED light.  You can use this light as a cool accent light behind your monitor/tv, even as a light to illuminate your keyboard or book in the dark.  In fact this light will work in any USB socket.  In order to safely construct this light you need to understand the fundamentals of electricity and electrical wiring.  You will also need to be comfortable with soldering.  This project should take around 30 minutes for an individual who is proficient at wiring and soldering.
 
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Step 1: Gather Parts and Tools

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The first step to constructing this LED light is to purchase and gather the necessary parts and tools. Hover your mouse over the parts in the pictures above to get a part number if you need help finding parts.

Parts:
• 5mm LED light (3.6 volts, 25 mA)
• Resistor (68 ohms)
• 5mm LED holder
• USB 2.0 cable
• Electric Tape
• Wire Coat Hanger (Pipe cleaners will also work)
• Heat Shrink tube (optional, but preferred)

Tools:
• Soldering Iron
• Rosin Core Solder
• Wire cutters
• Wire strippers (razor blade may be needed if wires are too small for strippers)
• Hairdryer or Heat gun

Warning: Do not have your USB cable inserted into any USB port while constructing your USB light (you might get shocked).
Warning: Place your soldering iron tip on its stand so it does not burn you or your workstation.
hydranix1 month ago

Careful when viewing the images of electronics in this Instructable, you might get shocked!

I wouldn't be too worried about being shocked from the voltage coming out of a USB cable. Still, it is better to be cautious than shocked.
Other than that, this instructable is very well put together.
it is good to be careful, but the voltage coming out of a 5V is not enough to shock a person, if it were powerful enough too, then it would burn out the led, even with the resistor
yes, very detailed...thanks.