BH1417F FM stereo transmitter circuit
Using BH1417F FM stereo transmitter circuit can be designed a high efficiency FM stereo modulator electronic project .
This stereo FM stereo transmitter circuit use the BH1417F FM stereo transmitter IC which consists of a stereo modulator for generating stereo composite signals and a FM transmitter for broadcasting a FM signal on the air.
The stereo modulator generates a composite signal which consists of the MAIN, SUB, and pilot signal from a 38kHz oscillator.
This BH1417F stereo FM transmitter circuit is capable of broadcasting good quality signals over a range of about 20 meters and is ideal for broadcasting music from a CD player or from any other signal source so that it can be picked up in another location.
This stereo micrometer broadcasts on the FM band (ie, 88-108MHz) so its signal can be received on any standard FM tuner or portable radio.
L1 coil comprises 2.5 turns of 0.5 - 1mm enamelled copper wire (ECW) wound onto a tapped coil former fitted with an F29 ferrite slug. Alternatively, you may also use any commercially made 2.5 turns variable coil.
The antenna for this micrometer circuit project consists of a 1.5m length of insulated hookup wire, with one end soldered to the antenna terminal.
S 1 , S2,S3,S4 switch is a SPDT subminiature switch (Jaycar ST-0300, Altronics S 1415 or equiv.) and is used for frequency selection .
Using the table below you can configure the transmitter frequency .