Stereo FM Transmitter with RDS/RBDS Breakout - Si4713
Si4713-based stereo FM transmitter breakout with I2C control, line-level stereo audio input, and RDS/RBDS text transmission. Transmits up to ~10 m; tune frequency and station metadata from any Arduino or microcontroller.
Pinout
- LIN
Line-level left audio input; also connected to the headphone jack, with onboard AC blocking capacitor.
Type · AnalogVoltage · about 0.7 Vpp line-level audio per Adafruit Learn - RIN
Line-level right audio input; same role as LIN for the right channel.
Type · AnalogVoltage · about 0.7 Vpp line-level audio per Adafruit Learn - Vin
Power input for the breakout and Si4713 chip.
Type · PowerVoltage · 3-5V DC per Adafruit Learn - GND
Power and logic ground, connect to the microcontroller ground.
Type · GroundVoltage · 0V / common ground - 3Vo
Output from the onboard regulator for external 3.3V use.
Type · PowerVoltage · 3.3V nominal, up to 100mA per Adafruit Learn - RST
Reset input; must be toggled before communicating with the chip, logic 0 holds reset.
Type · ControlVoltage · 3-5V logic compatible input per Adafruit Learn - CS
SPI chip-select input; also selects the I2C address, default high gives 0x63 and grounded gives 0x11.
Type · SPIVoltage · 3-5V logic compatible input per Adafruit Learn - SCL
I2C clock line, connect to microcontroller SCL.
Type · I2CVoltage · 3-5V logic compatible input per Adafruit Learn - SDA
I2C data line, connect to microcontroller SDA.
Type · I2CVoltage · 3-5V logic compatible input per Adafruit Learn - GP1
Extra GPIO output pin number 1; initial state helps set analogue mode, so do not short to ground or VCC during reset.
Type · GPIOVoltage · 3V output only per Adafruit Learn - GP2
Extra GPIO output pin number 2; initial state helps set analogue mode, so do not short to ground or VCC during reset.
Type · GPIOVoltage · 3V output only per Adafruit Learn
| Pin | Type | Function | Voltage |
|---|---|---|---|
| LIN | Analog | Line-level left audio input; also connected to the headphone jack, with onboard AC blocking capacitor. | about 0.7 Vpp line-level audio per Adafruit Learn |
| RIN | Analog | Line-level right audio input; same role as LIN for the right channel. | about 0.7 Vpp line-level audio per Adafruit Learn |
| Vin | Power | Power input for the breakout and Si4713 chip. | 3-5V DC per Adafruit Learn |
| GND | Ground | Power and logic ground, connect to the microcontroller ground. | 0V / common ground |
| 3Vo | Power | Output from the onboard regulator for external 3.3V use. | 3.3V nominal, up to 100mA per Adafruit Learn |
| RST | Control | Reset input; must be toggled before communicating with the chip, logic 0 holds reset. | 3-5V logic compatible input per Adafruit Learn |
| CS | SPI | SPI chip-select input; also selects the I2C address, default high gives 0x63 and grounded gives 0x11. | 3-5V logic compatible input per Adafruit Learn |
| SCL | I2C | I2C clock line, connect to microcontroller SCL. | 3-5V logic compatible input per Adafruit Learn |
| SDA | I2C | I2C data line, connect to microcontroller SDA. | 3-5V logic compatible input per Adafruit Learn |
| GP1 | GPIO | Extra GPIO output pin number 1; initial state helps set analogue mode, so do not short to ground or VCC during reset. | 3V output only per Adafruit Learn |
| GP2 | GPIO | Extra GPIO output pin number 2; initial state helps set analogue mode, so do not short to ground or VCC during reset. | 3V output only per Adafruit Learn |
Pin details
11 connections- LIN
Line-level left audio input; also connected to the headphone jack, with onboard AC blocking capacitor.
AnalogVoltage · about 0.7 Vpp line-level audio per Adafruit Learn - RIN
Line-level right audio input; same role as LIN for the right channel.
AnalogVoltage · about 0.7 Vpp line-level audio per Adafruit Learn - Vin
Power input for the breakout and Si4713 chip.
PowerVoltage · 3-5V DC per Adafruit Learn - GND
Power and logic ground, connect to the microcontroller ground.
GroundVoltage · 0V / common ground - 3Vo
Output from the onboard regulator for external 3.3V use.
PowerVoltage · 3.3V nominal, up to 100mA per Adafruit Learn - RST
Reset input; must be toggled before communicating with the chip, logic 0 holds reset.
ControlVoltage · 3-5V logic compatible input per Adafruit Learn - CS
SPI chip-select input; also selects the I2C address, default high gives 0x63 and grounded gives 0x11.
SPIVoltage · 3-5V logic compatible input per Adafruit Learn - SCL
I2C clock line, connect to microcontroller SCL.
I2CVoltage · 3-5V logic compatible input per Adafruit Learn - SDA
I2C data line, connect to microcontroller SDA.
I2CVoltage · 3-5V logic compatible input per Adafruit Learn - GP1
Extra GPIO output pin number 1; initial state helps set analogue mode, so do not short to ground or VCC during reset.
GPIOVoltage · 3V output only per Adafruit Learn - GP2
Extra GPIO output pin number 2; initial state helps set analogue mode, so do not short to ground or VCC during reset.
GPIOVoltage · 3V output only per Adafruit Learn
Start wiring
UART · SPI · 3.3 V · Breakout
Confirm the data interface matches your host board.
Module pins: Vin, 3Vo, GND, LIN, RIN, SCL, SDA, GP1. Schematik maps them to your board in the app.
LoRa & RF
93 other optionsRFM95W and SX1262 LoRa transceivers, Wio-E5 LoRaWAN modules, SX1302 gateways, Digi XBee mesh radios, 433 MHz ASK serial links, Dragino IoT sensor nodes, and the SDRplay RSP2 wideband SDR receiver.
2mm 10-Pin XBee Header visual preview2mm 10-Pin XBee Header
2mm 10-Pin XBee Socket - SMD visual preview2mm 10-Pin XBee Socket - SMD
2mm 10pin XBee Socket visual preview2mm 10pin XBee Socket
315MHz ASK/OOK Transmitter Module visual preview315MHz ASK/OOK Transmitter Module
315MHz RF Link Kit visual preview315MHz RF Link Kit
315MHz RF Shield For Arduino visual preview315MHz RF Shield For Arduino
433MHz Wireless Serial Transceiver Module - 1 Kilometer visual preview433MHz Wireless Serial Transceiver Module - 1 Kilometer
900MHz Antenna Kit - For LoPy, LoRa, etc visual preview900MHz Antenna Kit - For LoPy, LoRa, etc
Adafruit RFM69HCW Transceiver Radio Breakout - 868 or 915 MHz - RadioFruit visual previewAdafruit RFM69HCW Transceiver Radio Breakout - 868 or 915 MHz - RadioFruit
Adafruit RFM95W LoRa Radio Transceiver Breakout - 868 or 915 MHz - RadioFruit visual previewAdafruit RFM95W LoRa Radio Transceiver Breakout - 868 or 915 MHz - RadioFruit
ADS-B 1090 MHz Antenna (0.6m, 5.5dBi) visual previewADS-B 1090 MHz Antenna (0.6m, 5.5dBi)
ADS-B 1090 MHz Antenna (1.2m, 8.5dBi) visual previewADS-B 1090 MHz Antenna (1.2m, 8.5dBi)
Related groups
4 groups
2.4 GHz Bluetooth Low Energy 4.0 Module V-13051 (-4 dBi) visual previewBluetooth
BLE 5-era modules (nRF52840, MDBT50Q), XIAO MG24 boards with Matter-over-Thread, Bluefruit UART/SPI bridges, HM-11 serial modules, and BLE sniffers cover different jobs and different hosts.
Wireless & comms · Bluetooth modules · 71 parts
600-6000MHz 5G Antenna visual previewCellular
Adafruit FONA GSM breakouts, the Gravity Air780EU 4G Cat 1 module, Dragino NB-IoT Shield-B8, Pycom FiPy, Quectel and SIMCom M.2 5G modems, and the RockBLOCK 9603 Iridium modem each target a different network tier.
Wireless & comms · Cellular · 58 parts
4G GNSS-RTK High Precision Positioning Kit (EMEA & Thailand, GPS / GLONASS / Galileo / BDS / QZSS) visual previewGNSS & GPS
Adafruit Ultimate GPS (PA1616S/PA1616D), NEO-6M and NEO-M9N u-blox breakouts, Gravity GNSS BeiDou boards with I2C/UART, and 4G or LoRa RTK kits — accuracy and constellation requirements split them.
Wireless & comms · GNSS & GPS · 68 parts
150M Miniature WiFi (802.11n) Module for Raspberry Pi visual previewNetworking
ESP8285, ATWINC1500, and EMW3060 Wi-Fi modules; the WIZ5500 Ethernet co-processor; the DP83848 RMII PHY board; 802.11n USB adapters for the Pi; and an XBee USB configuration adapter.
Wireless & comms · Wi-Fi & networking · 26 parts