Here is a schematic which can be used as car mp3 FM transmitter circuit which can broadcast your mp3 player audio on your car FM radio so you can hear your favourite songs on your car FM radio. This circuit is very useful and can perform a variety of tasks for example you can broadcast your computer
audio on your home stereo or any FM receiver, you can hear your tv audio on any FM walkman by putting the stereo plug of this circuit in the headphone jack so you can watch TV without disturbing to any one who is sleeping or taking rest. The preamplifier stage of this circuit is very good so it will broadcast good quality sound. L is equal of 2 turns of 24 guage enameled wire wound on 5mm former. Use 6 inch wire for antenna.