Usb Led




 i was messing with some leds the other day when i found that it would be brilliant to not worry about wasting the batteries using a led so i made this

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Step 1: Things You Will Need

soldering iron

820 ohm resistor(grey,red,brown)
usb lead(male)

Step 2: Cut Em Short

 cut the led and resistor legs short. make sure you know which is positive and negative on the led!

Step 3: Solder

 solder the resistor to the positive leg of the led.

Step 4: Kill the Usbted

 cut and slice and get frustrated with the usb until it comes open then strip the black and red wires and cut the others off.

Step 5: Solder 2f the Led

 solder the resistor to the red and the negative of the led to the black.

Step 6: Wrappin'

wrap the whole thing in tape apart from part of the usb and the led

Step 7: All Done

 plug in and bing! zap! pretty light 

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    15 Discussions


    4 years ago on Introduction

    Quite ugly but working.

    I also would rather make a "snake" and for this good powersource more than one LED in parallel.


    4 years ago on Introduction

    You don't need to slice open the plug, just attach the LED and resistor to the Red/Black (or whatever colours the maker of said cable had that week) wires, and you have a "snake" light! But otherwise, nice 'ible, dude!


    9 years ago on Introduction

    You realize a usb led is almost completely pointless. If you were to use it to test potentially broken usb ports it would have a small amount of (Insert clever synonym for usefulness here).

    4 replies

    Reply 9 years ago on Introduction

    Pointless? No. My desk is covered with small hand tools and parts that can be played with via 5V ~500mA. Great way to build stuff without having to worry about the weight batteries introduce.

    But while we're talking USB this page:

    "... short the 2 data lines together. The device will then not attempt to transmit or receive data. but can draw up to 1.8A if the supply can provide it."


    Reply 8 years ago on Introduction

    Why, good sir, one could use 12V cigarlighter->5V usb-converter when testing simple gadgets not requiring computer thus avoiding those grievious accidents.


    Reply 9 years ago on Introduction

    E-tape (electrical tape) is usually black, but you can get it in a rainbow of colors. You can buy it at Wal-Mart, Radio Shack or even a dollar store.


    9 years ago on Step 7

     Wow, this was actually a neat simple instruct.

    Good job. I needed a flashlight attachment for my laptop when the power goes out and I think this should work.

     its my first instructable so its not the best ever but at least you can see whats happening in the photos. im making soon a soldering workstation out of a old school desk you know the ones that you open up and put stuff in 


    9 years ago on Introduction

    Good concept, decent execution, but...

    2 replies

    Reply 9 years ago on Introduction

    I post that link a should be required reading at the 'please title your new instructable' screen.