I'm gonna show you How to make a Simple FM Transmitter that works with only an AA battery.
47 pF Ceramic Capacitor x1
33 pF Ceramic Capacitor x1
10 pF Ceramic Capacitor x1
22 uF Electrolytic Capacitor x1
2SC655 (or BC548) Transistor x1
Single Battery Holder (AA Size)
10cm Magnet wire x2
Audio Signal Source (e.g. a MP3 Player)
Step 1: The Circuit and Parts
Here is the Circuit we're going to make.