Low Power/Low Cost FM Stereo Broadcaster

The project aims to develop an FM stereo broadcaster by overcoming the low modulation of the little iPod FM transmitters that are mostly used in the car and the poor frequency control of the Ramsey-10C.

The assembly of the project includes putting together 3 highly integrated modules rather than assembling discrete components. A Bare-Bones Board was selected in order to provide an Arduino controller. A variance of C language is used to program the open-platform Arduino using the free development tools. This broadcaster can show the current frequency and carrier state on an LCD display and can allow the FM carrier to be taken OFF-AIR or ON-AIR as required. It can also provide access to the entire FM broadcast band while the last known frequency can be recalled.

The enclosure of the project should be made of metal since this is an RF project. A BNC connector would be suitable because the RF output is 50 ohms impedance. The LCD, Arduino, and FM Transmitter modules are separately mounted to a perfboard and are interconnected. The Arduino and LCD are powered by adding a 5V regulator while a 5V supply powers the breadboard.

Rest of the project