The FM transmitter circuit is a high quallity transmitter that includes RDS/SCA input and Audio/MPX input with optional preemphasis. It can be used with or without stereo encoder. Tuning over the FM band is provided by two buttons. The transmitter can work also without the LCD display. This FM transmitter is easy to build, and a high-quality PLL FM transmitter with typical output power of 5W and designed with no-tune method (broadband method). PCB You may choose between sin [...]
Here's a new Phase Locked Loop (PLL) FM Transmitter from PIRA CZ. This PLL controller is programmed by PIC PIC16F627A with a single I2C TSA5511 (TSA5512/SDA3202). The transmitter includes RDS/SCA input and Audio/MPX input with optional preemphasis. It can be used with or without stereo encoder. Tuning over the FM band is provided by two buttons. The transmitter can work also without the LCD display. Pira CZ 5W PLL FM Transmitter Documentation Visit PIRA CZ See more : FM Transmitter - L [...]
Here's a Phase Locked Loop (PLL) FM transmitter circuit with high gain amplifier on the final stage. If the unit is to be used with a stereo encoder, the pre-emphasis must be disabled. The audio input network has a potentiometer to set the audio level and jumper selectable pre-emphasis. The PLL FM transmitter uses the standard PLL architecture. The PLL error voltage is summed at the input of the audio buffer, which is implemented by a BC558 transistor. The PLL error voltage enables the [...]
With this simple VHF FM transmitter you could play audio files from an MP3 player or computer on a standard VHF FM radio. The circuit use no coils that have to be wound. This FM transmitter can be used to listen to your own music throughout your home. When this FM transmitter used in the car, there is no need for a separate input to the car stereo to play back the music files from your MP3 player. This FM transmitter uses a chip made by Maxim Integrated Products, the MAX2606 [1] To kee [...]
This wireless FM transmitter is designed to use an input from another sound source and transmits on the commercial FM band. This low power fm radio transmitter it is actually quite powerful. The first stage is the oscillator, and is tuned with the variable capacitor. Select an unused frequency, and carefully adjust C3 until the background noise stops (you have to disable the FM receiver’s mute circuit to hear this). When assembling the wireless transmitter circuit, make sure the rotor [...]
How to build and improve rf transmitter AM-FM-TV Transmitter