it won't charge even tho its plugged in for charging

well , first of , i'll admit that i tried to create a charger with a headset and an old usb chord . i tried using it with the shuffle when it got done . sad to say , it didn't work . few days later i received an original iPodshuffle charger from a friend . i was so happy to use that i quickly plugged the shuffle in the charger then connected the charger to a pc , i left it there for like 8-10 mins then checked it up just to know that it didn't charge (even the signal light of the shuffle won't work , haven't noticed it from the start(too excited)) but , it heated up the unit(iPodShuffle) . the heat was tolerable for human and i bet for the unit too . so i plugged it out and let it cooldown for a while so i can redo the charging process again . and i wasn't surprise with the results that the same thing happened . is my unit still fixable ? have i wrecked it by using a selfcreated charger ? if any answers or reply would come for my convenience , i know that a thankyou would not be enough , still , thankyou .