while working at night time on laptops and computers we experience difficulty in vision and here is the solution for that and its our USB Lamp..............
Step 1: Requirements
all u need is
1. 100 ohm resistor (01)
2. led lights
3. old used flashdrives or male USB pins
4. some wires
5. soldering equipments
6. some insulation
Step 2: Step 1:
the usb pin has four pins and the lower one is positive and the top one is the grnd
solder a 100ohm resistor to the grnd pin and a wire to the positive pin.
then fix a led to the wires. seeing the positive and the negative correctly.
after completion this would show a look like those on the pics.
Step 3: Step 3: Conclusion
alright after all this pin it to the usb port in ur laptops and enjoy the lights..........................
Step 4: USES
1. better view of keyboard at dark
2. ease to carry
3. cheap at rupees 5.