Circuit Stereo FM Transmitter ba1404
The heart of that circuit is the circuit integrated ba1404, that is a mini fm
transmitter, that already counts with the necessary internal circuits for transmission in fm.
just being necessary to increase some components discman or any other audio source turning the wireless. If you already set up other
transmitters of transistorized fm it will see that when setting up that with having integrated BA1404, that the quality of the sound and the frequency stability is excellent. Besides the but it presents easy assembly.
The feeding of the integrated circuit is from 1.3 to 3 volts, observe that if the tension passes of 3 volts the ci it toasts. With two piles of 1,5 volts you will get maxim potency of the ba1404, THE capacitor CX it is a bypassing capacitor he will be of 100nF if the feeding be made even with piles, but if it will use source of external feeding, CX it should be of 2200µF (electrolytic) + 100nF (ceramic)., if necessary it uses an inductor of 100µH in the feeding line +b.
Remember to use a source very well regulated, since if the tension passes of 3 your volts CI BA1404 it will toast. The same best is to use two batteries you recharged of those that it comes with
digital cameras. But if you want to use an eternal source, I recommend that uses one with ci lm317 and adjust the exit for 3volts. with a multimeter.