so after going through many instructables, i finally decided to make one.i was having an old usb flash drive without any cover and three old halogen bulbs so i decided to test on it.

on first i was trying to put the pcb inside bulb by cutting the bulb because separately it was a bit longer but pcb was wider so the bulb broke out.then i tried separately...have a look

what you will need

MATERIALS

an old halogen bulb from car headlight
old usb flash drive
blue led
220 ohm resistor
soldering iron & wire
super glue
glue gun
perfume bottle neck and cover(according to usb)

Step 1: MAKING

first of all take out the glass bulb from its holder without breaking it as u can see i have broke one too ;-)
take out glass holder which i have mentioned in picture.you can use it for other project too and its size is perfect for usb male port as u can see.in my case its 2 points are fitted accurately at the usb connector to pcb soldering points so i soldered the metal with the pcb.
sold the 220 ohm resistor on led+ leg and sold the other end of the resistor to 5v pin of usb connector and led- with gnd (see usb connector picture for pin outs)
take out perfume bottle neck (see picture for reference) and make its hole wider so the flash drive`s pcb can go through it.in this way the neck will get connected to the glass holder metal.
as you know the bottle neck provides a top cover support also so cut the cover by required length
connect one side of the cover with glass holder metal and on the other side put the halogen bulb
finally wrap all with sticker and there you go....usb ready

Step 2:

CONCLUSION

i broke 2 bulbs in this preparation.
so in case if you broke one too just put the bulb in opposite direction..it will also look cool..
sorry for my bad english