FM transmitters can be used to stream music from your iPod to your car stereo system. It would still be better if you can make one for yourself without spending all your savings in the projects. The DIY will cost you around $5 and can be made from stuff lying idle in your storeroom. Click here for the detailed procedure. Warning: In some countries it is illegal to transmit radio on the FM band without a license. Via: Hackedgadgets