I tried to show FM modulation in simulator but could not get time differences to show together. You may have to vary battery voltage to start FM oscillator. This project is shown as working model, http://makezine.com/projects/super-simple-fm-transmitter/ , as well as step by step construction. Right top is antenna but for private use you will probably not need one. Be careful not to interfere with public broadcasts. The transistor is 2N3904.
