Stereo FM transmitter module by STC89C52 MCU, BH1415F FM modulation transmitter module, LCD1602 LCD module, audio amplification input module, high frequency power amplifier module, power module, a feeder, a special launch antenna. Control module is by the matrix keyboard and infrared remote control to send a message STC89C52 MCU, after compiling the code sent to BH1415F processing chip, FM transmitter module is the direct frequency modulation varactor diode, combined with phase locked loop (PLL) system, can be very high center frequency stability, signal and then through the high-frequency amplifier, through the feeder to the air-launched FM electromagnetic signals for headphones, FM radio reception with a receiving device.
Keyword:STC89C52 BH1415F PLL FM varactor diode high-frequency power amplifier