Usb Led





Introduction: 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

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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    Quite ugly but working.

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

    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!

    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).

    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."

    USB port are 5V 100 mA only!!

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

    nifty for a guide light for plugging things into the back of a desktop =)

    what is e-tape?

    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.

    ohhhh, you mean the black electrical tape, usually made of PVC?