SI4713 Stereo FM Transmitter Module — compact, readytointegrate FM sender for stereo audio projects. Designed around the SI4713 chip, this module provides a digital wireless radio transmitter with a regulator interface, LED status indication, and twochannel (left/right) input on a compact PCB. It is ideal for adding FM transmission capability to DIY electronics, car audio adapters, or portable audio projects. Why this module matters Turn any linelevel stereo source into an FM radio broadcast quickly and reliably. No external encoder required — the SI4713based board handles digital FM transmission for straightforward integration. Builtin regulator interface simplifies powering the module from common supply voltages, reducing the need for extra components. Visual feedback via LED indication and a needle indicator helps with setup and tuning so you can confirm operation at a glance. Key benefits Simple integration: Standard stereo inputs (2channel) make it easy to connect phones, MP3 players, media centers, or preamplified audio outputs. Reliable FM transmission: Uses the SI4713 radio transmitter chip to deliver stereo wireless audio to any nearby FM receiver. Easy power management: Regulator interface onboard reduces design time and component count when fitting into projects or installations. Quick setup and troubleshooting: LED indication plus a needle indicator provide visual confirmation of power, status, and tuning or signal level. Main features and attributes Model/chip: SI4713based stereo FM transmitter module. Audio inputs: Twochannel stereo linelevel inputs for left and right channels. Indicators: LED status indicator and needle indicator for visual feedback. Power: Onboard regulator interface for easier power connection and stable operation (module includes a regulator interface; check source voltage compatibility before connecting). Form factor: Compact printed circuit board (PCB) module suitable for embedding in DIY projects, enclosures, or retrofit installations. Connectivity: Standard boardlevel pads/terminals for audio input, power, and antenna connection (antenna not included). Intended use: Transmit audio wirelessly to standard FM receivers within range and local regulations. Practical use cases Car and home audio adapter: Convert a smartphone, MP3 player, or media streamer output into an FM signal to play through any FM radio without wiring changes. DIY electronics and prototyping: Integrate into Raspberry Pi, Arduino, or custom hardware projects to add local FM broadcasting capability for demos, prototypes, or educational projects. Portable or temporary audio distribution: Broadcast background music or announcements in small venues, workshops, or exhibitions where shortrange FM transmission is appropriate. Installation and compatibility notes Connect the left and right linelevel outputs from your audio source to the module's twochannel inputs. Provide a compatible power supply to the module's regulator interface. Use the LED and needle indicator to confirm correct power and operational status. Attach an appropriate FM antenna to the module's antenna terminal for transmission range and quality. The module transmits to standard FM receivers; ensure you operate on permitted frequencies and comply with local regulations for FM transmission. What to expect A compact, boardlevel FM transmitter solution based on the SI4713 chip, offering stereo transmission, visual status indicators, and a regulator interface for simplified power handling. Suitable for hobbyists, developers, and anyone needing a compact FM transmission module for shortrange audio broadcasting. Note: This product is a module board intended for integration. Verify power requirements and local FM transmission rules before use.