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Picture of How to make a USB Light
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This night lamp isn't only cheap, it is also very easy to make. All you need are cheap and easy to find electronic parts and a little of soldering knowledge.

If you are one of those who has a roomate and need to work on night but he/her needs to sleep, this lamp is very useful for you. All you need to do is connect your lamp, turn of the light and your roomate can get some sleep, and you're still available too see your keyboard!!!

Step 1: You need:

Tools:
- Hot glue gun (optional)
- Soldering iron
- Solder
- Welding grease
- Cutting pliers

Materials:
- 1 USB male connector
- 1 white light LED
- 1 120 Ohm resistor
- About 20 centimeters of cable for speakers
- Wire of a notebook
- Same size of heat shrink tube (5mm in diameter)
- A small piece of another heat shrink tube (around 10mm in diameter)
 
A tip from my brother: sanding the LED so the light spreads and it will look brighter
 
florlayamp3 years ago
i built one similiar to yours from your instructions but used a 100ohm resistor, it works perfectly with my usb charger but when i plug it in to my computer it shuts the computer off instantly and the computer wont turn back on for 5 mins. any ideas?
maybe your lamp get short circuit.so your computer will shutdown
The USB port can not deliver the current (I=V/R, 5V/100ohm=500mA) that your circuit is drawing. Typically USB v 1.0 and v 2.0 ports can only deliver 500 mA (http://m.extremetech.com/extremetech/#!/entry/how-usb-charging-works-or-how-to-avoid-blowing-up,4f1ef7bd890708bd1a0104d4).
I figured out why it wasnt working, one of the wires was exposed and making contact with the USB cable shielding. It was making the computer think it was shorted out and it was shut off instantly to avoid damage. :)
chekespeare3 years ago
would have been better if you put another tubbing instead of tape.