Building a good FM transmitter(88-110Mhz) begins with getting a good schematic. You don’t have to understand the precise working of the transmitter to build it. But some basic information won’t harm. A transmitter alone is, as you probably know, is not enough to start your radio-station. In the simplest form you need 4 things. First an input device such as an amplifier you also use with your home-stereo.

You can also use a MP3 player, phone, PC. Details about input-devices in the page: “Input”. Second you need a regulated power-supply. In this case a 14-18 Volts/2,5-3,5 Ampere. One of the most influencial things you need is antenna and coax-cable. More about this later on. And finally the transmitter itself. You can divide the transmitter in two main parts: the oscilator and the amplifier. The oscilator converts electric sound information into electromagnetic waves. The amplifiler gives these waves a bigger amplitude.

Components List:

Complete explanation about this transmitter FM circuit, please visit this page