NEW FM Transmitter SI4713 Stereo Frequency Modulation CJMCU-4713 DC 3-5V
  • LIN: Audio input, connected to the left channel of the headphones.
  • RIN: Audio input, connected to the right channel of the headphones.
  • Vin: The power supply voltage is 3-5VDC.
  • GND: Ground.
  • 3V0: This is the regulator interface, connected to 3.3V, if you need 100mA of 3 volts, you can use this adjustment to adjust the voltage.
  • RST: Reset.
  • CS: Select pin for spi mode. The i2c address is determined. When connected high (default), the i2c address is 0x63. If grounded or shorted, the i2c address is 0x11.
  • SCL: Clock pin, connected to the microcontroller.
  • SDA: Data pin, connected to the microcontroller.
  • GPIO: Can be used to flash the LED, the initial state has been set, 3V output.
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