## Aleksandr Vikulin

Saved 12/22/15 3:18 PM from computer programs

# How to make illumination of the keyboard of the laptop with own hands \/ How to make a lighting for laptop keyboardSee details »

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Video subtitles:
• 00:00: Hi my dear friends! In today's video I'd like to show you a brilliant idea about how to make a USB lighting for a laptop keyboard Well, what do we need for making it? First of all, of course, we need a hot-melt glue, a solderer, USB jack plug a lid from a plastic bottle, a tester, one LED, you may choose any color of it Here I've got white, green, blue, there are also such LEDs Personally I would recommend you to use a white LED not to stress the eyes
• 00:33: We also will need one resistor for 100 Ohm I ordered these resistors from China, so there are a bit confused values That's why we are going to choose one resistor with the help of a tester We set the switch on the needed characteristics and limit of measuring. In our case there is 200 Ohm We touch the legs of the resistor with the probe or a crocodile clips and look at the display As you may notice resistance of the resistors is about 150 Ohm, they won't do We take other resistors, Check them
• 01:07: This is another story There is a result of 102 Ohm It turns out that these resistors for 100 Ohm and plus-minus a few per cents of fault So we tear one for ourselves Well, we have already picked a resistor and a LED Now let's say a few words about pinning of the jack plug First and fourth contacts are plus and minus Second and third contacts are for transferring the data We move to the assembling Clench a jack plug into the third hand and solder the resistor to the minus Polarity of the resistor doesn't matter in this case
• 01:39: We move to the LED As you might have noticed this LED has two legs – anode and cathode Anode is a plus and cathode is minus Accordingly plus has a longer leg than the minus If you use a LED secondarily and legs are of the same length you may define plus and minus by a filed off skirt or by the crystal bed Now we solder the minus that is called cathode of the LED to the resistor
• 02:09: I have shortened the legs a little bit, applied some flux, soldering alloy and soldered them In the conclusion we solder a plus from USB plug to the LED's plus We also apply flux or resin, a bit soldering alloy and solder it We insert a jack plug into the USB connector If a LED flashed, you have done everything right Then we put a mark, bend a resistor and a LED into needed position
• 02:39: Fill a lid from a plastic bottle with a hot-melt glue and insert a resistor, a LED and a USB connector till the mark we have put before Actually, everything is done But I decided to color the lighting in a black color As there is a white lid, a hot-melt glue will not suite very well to the black laptop Well, guys. Here there is a final result
• 03:12: It looks good and lights moderately too It's not so bright to bother those who is having a rest beside you However it's not so dimly, so you can easily distinguish all letters in the dark Also this lighting will be helpful in case if there is no light in your room and the screen of your laptop has blinked off Moving to the light's switch you can feel your laptop under your foot or knock it However the lighting will be always on If you enjoed this video and you want to see more video with electronics, press like under this video and write in comments what you would like to see in my next video
• 03:45: Have a nice day. Bye-bye! Do you know? Before 1962 LED's cost was about \$200 per item