USB Laptop Light

30,689

49

22

Introduction: USB Laptop Light

Quick, easy and cheap way to make a USB laptop LED light. I made this one in about 20 minutes with spare parts. Great for presentation or just night time surfing.

Be the First to Share

    Recommendations

    • Fabric Challenge

      Fabric Challenge
    • Build a Tool Contest

      Build a Tool Contest
    • First Time Author Contest

      First Time Author Contest

    22 Comments

    0
    sinner_93
    sinner_93

    11 years ago on Introduction

    My LED just flashed thrice, and then gives out a very dim light. Why is this happening? BTW I used the USB plug from an old mouse, is it because of that?

    0
    gamer
    gamer

    14 years ago on Introduction

    why are you putting the green and red together??? what about the white and black? why didnt you put a resistor on your l.e.d. (why do you say it is 5 volt 30 mA)? nice project, except for a few... lot of questions i asked myself while you were building it... -gamer ps. please answer the many questions, because i dont understand half of the stuff about this video, and i know a lot about L.E.D.s and USB... thanks

    0
    mellink
    mellink

    Reply 13 years ago on Introduction

    can i help.
    The LED when supplied with 5V and 30mA (3x10-3A) needs a resitor to stop the current burning out the LED.
    Use V=IR to calculate the resitor value.
    in this case:
    V/I=R
    5/(30*10-3) = 166.6 Ohms
    So just go for a resistor near that and your safe.

    0
    SRRPC
    SRRPC

    Reply 12 years ago on Introduction

    hey i was wondering if i could damage anything on my laptop if i touched the positive and negative together.?prolonged or momentary i jus want to know before i damage anything.
    thanks

    0
    branedge
    branedge

    Reply 14 years ago on Introduction

    someone will have to explain the resistor to me....i dont quiet know why to use it. i can add that the laptop light 2.0 version. gamer - the ledinfo 5 volt 30 mA came off the package...was trying to tell folks what i used. from my research(not a lot) on usb cable the red and black are for the power the white and green are for data...when i used these it windows tried to discover my usb device and i only wanted power. plus these are the color combinations that worked, hope this helps will answer more if u want

    0
    gamer
    gamer

    Reply 14 years ago on Introduction

    im guess gonna have to make an instructable about the usage of a resistor, so everyone understands... when i try to get power from the usb port, i use the black as the gnd, and the red as the vcc (positive)... the data shouldnt be used, this is just giving the laptop a 1 on both data, and it wonders what that is supposed to mean... anyways... if it worked.

    0
    eydryan
    eydryan

    Reply 13 years ago on Introduction

    he meant the white and green wires of his led :)

    he didn't touch the white and green data wires.

    0
    ThinkBeforeYouSpeak
    ThinkBeforeYouSpeak

    Reply 14 years ago on Introduction

    i had a 5volt 30mA LED they sell em at radio shack, they only need about a 1/4 watt 100ohm resister and they work fine

    0
    pennachi1
    pennachi1

    12 years ago on Introduction

    I just did this and it works great. Took five minutes and now I am writing in the dark.

    0
    gnuoy
    gnuoy

    12 years ago on Introduction

    it looks very iteresting, but could you please post a regular non-video version of the guide? metacafe players is terrible and won't let me see it

    0
    HiImLizzay
    HiImLizzay

    13 years ago on Introduction

    Great video! I made my own, and added my girly touch to it, I thought it would be cool if it looked like a flower so I made "petals" made of acrylic paint, puffy paint, and aluminum foil for the reflective purpose! I also spray painted the "stem" green, and voila a really fun project! I also ended up using some tubing for fermenting beer to stabilize the wire so it didn't droop down from the usb port (that was my own mistake because i didn't extend the wire far enough to the base) but it worked fabulously! Thanks for the video it was great! PS- It defiantly didn't need a resistor.

    IMG_1527.JPGIMG_1528.JPG
    0
    JshDav
    JshDav

    Reply 13 years ago on Introduction

    Yeah good idea, I would definitely do that if I was going to make this.

    0
    shooby
    shooby

    13 years ago on Introduction

    They sell USB LED keyboard lights at my local dollar store. For 1$ US.

    0
    npsark
    npsark

    14 years ago on Introduction

    i suggest you sand the led to diffuse it a bit. very nice though

    0
    iMoody89
    iMoody89

    14 years ago on Introduction

    10x very much for this video i used it to fix my laptop cooler thanks a lot again nice job