Apparatus required:-

  • 4 pice of white led light
  • usb cable
  • black tape
  • soldring iron
  • small pice metal wire

step 1:-

insert all 4 led in the vero board so that you can connect two of them in seriese....

connect led1 and led 2 in seriese..

strip the usb cable and find out the vcc and ground wire in there...

connect the usb gnd and vcc in parallel with (led1,led2)and (led3,led4)....

cut a metal wire according to the length of your usb cable...

cover wire and usb cable with black tape...

now its time to test the usb light...

just plug in the usb cable,,, in your pc....before testing check your connection properly... if there is any error then it will damage to your pc...

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