Mini FM Stereo Transmitter scheme BA1404

Transmitter mini stereo FM is suitable for those of you who want to make a studio broadcast simple for learning materials broadcast, or just to play music in a room of the house, buildings and others that could be heard over the radio FM receiver there, or else through a gadget that has FM radio facility. besides a series of mini pemancara's FM stereo transmitter can also be used for cars. with this transmitter input source can be emitted as music MP3, Ipod, computer and other audio sources.

Mini FM stereo transmitter IC BA1404 is used as the heart of this circuit. where BA1404 is specifically designed to work with low voltage and power, because this circuit can work only with a supply voltage of between 1.5 volts to 3 volts DC. already contained in the IC BA1404 stereo modulator circuit and RF circuit as a frequency generator (oscillator). This oscillator can be transmitted with a frequency of 76 to 108 MHz.

The above are a series of crystal that serves to 38KHz frequency generator stereo encoder. while L1 serves to determine the frequency you want to use, coil L1 is comprised of from 3.5 lilitkawat email 0,6mm ferrite core. to change the frequency of the transmitter is done by turning the core feritpada L1. the advantages of mini FM stereo transmitter with BA1404 IC is its ability to generate highly stable frequencies with very low cost of course.

As an illustration, one example of a kit form mini FM stereo transmitter circuit that is so is as follows :

To prevent a buzzing sound when the audio is emitted, it is necessary to note the power supply circuit is used. it is advisable to use a battery to supply voltage, or if you want to use for a long time, can use the adapter with a good regulator circuit.