SparkFun FM Tuner Evaluation Board - Si4703

The Sparkfun FM Tuner Evaluation Board - Si4703 is a versatile gadget that uses the Silicon Laboratories Si4703 FM tuner chip. This board not only allows you to tune into FM radio stations but also possesses the ability to detect and process Radio Data Service (RDS) and Radio Broadcast Data Service (RBDS) information. Thanks to the Si4703, the board can filter and detect carriers effectively, displaying data such as the station ID and song name for the user's convenience.

The Sparkfun FM Tuner Evaluation Board - Si4703 is capable of receiving multiple stations, rivaling a standard FM radio in performance. The board breaks out all the major pins, making it straightforward to incorporate this chip into your next radio project. The power bus, 3.3V, and GND pins are broken out for communication. The breakout provides access to SDIO and SCLK for I²C communication, while the RST can be used for easy resetting. The SEN pin changes the IC's mode of functionality. The last two pins broken out are GPIO1 and GPIO2, which can be used as general input/output pins or for functions like RDS ready, seeking, or tuning.

Interestingly, by plugging headphones into the 3.5mm audio jack, you can use the cable in your headphones as an antenna! This means that the board doesn't require an external antenna if you're using headphones or a 3.5mm audio cable longer than approximately 0.91 meters.

Documents:

• Schematic
• Eagle Files
• Datasheet (Si4703)
• Datasheet (AN243)
• Hookup Guide
• GitHub (Library, Example Code, & Design Files)
• Product Video