FM transmitters are nothing new – plug one into your MP3 player, match the frequency displayed to your car radio, and you’re set. But the new KitSound device for iPods and iPhones claims to be ...
This can be used as an in-car hands-free speakerphone. Figure 1. An FM transmitter circuit with microphone for use as a hands-free cell phone. IC1 is an integrated IF voltage-controlled oscillator ...