SI4713 Stereo FM Transmitter Module, High-Quality FM Audio Broadcasting Board, I2C Control, Compatible with Arduino, Raspberry Pi, DIY Radio Projects

Pin Descriptions (for reference only): LIN: Audio input, connects to the left channel of headphones. RIN: Audio input, connects to the right channel of headphones. Vin: Supply voltage 3-5VDC. GND: Ground. 3V0: This is the regulator interface, connects to 3.3V. Use this to adjust the voltage if you need 100mA of 3V. RST: Reset. CS: Select pin, used for SPI mode. Determines the I2C address. When connected high (default), the I2C address is 0x63. If grounded or shorted, the I2C address is 0x11. SCL: Clock pin, connects to the microcontroller. SDA: Data pin, connects to the microcontroller. GPIO: Can be used to blink the LED. Initial state is set, 3V output.

• High-Quality Stereo FM Transmission: Utilizes the SI4713 chip to provide crisp, clear stereo FM audio broadcasting with low distortion and high fidelity.
• I2C Digital Control Interface: Easily controlled via I2C communication, making integration simple with Arduino, Raspberry Pi, ESP32, STM32, and other microcontrollers.
• Wide Frequency Range: Supports FM transmission across the standard 76–108MHz band, suitable for personal radio stations, wireless audio, and educational experiments.
• Compact & Developer-Friendly: Small module size with clear pin labeling, perfect for DIY radio projects, audio experiments, and prototyping.
• Versatile Applications: Ideal for wireless audio streaming, micro FM radio transmitters, educational kits, hobby electronics, and custom broadcasting solutions.