FM Receiver Module Adjustable Frequency Stereo Output Digital FM Radio Receiver Module

Features 1. EASY TO USE: The FM_ANT port of the FM receiver module is used to connect the FM antenna. For better reception of FM signals, it is recommended to connect an external 75cm length trolley antenna. 2. SPEAKER FUNCTION: The digital FM radio module comes with a 3W x 2 channel sound amplifier, so if you need speakers, you can plug them into the speaker port. Practical and convenient. 3. HEADPHONE FUNCTION: The digital FM receiver module automatically switches to the headphone channel if headphones are plugged in, and the speaker channel is automatically started up. 4. AUTOMATIC SEARCH: FM radio module is simple and short to operate, press the encoder to automatically search for local radio stations, adjust the receiving frequency, the LCD screen shows the current frequency, the search stops when a valid station is found. 5. TURN ON OR OFF: Press and hold the VOL knob to switch the FM radio module on or off, the LCD display shows the caption ON to turn on the automatic noise, OFF to turn off the automatic noise. Specification Item Type: FM Receiver ModuleMaterial: PCBInterface: For Android InterfaceOperating Voltage: 3.0-5.0V How to Use FM Receiver Module Description : Power supply 1, the module with Micro USB interface, you can use the computer USB power supply. 2, the module corresponds to the port (marked on the PCB) ‑, + are connected to the negative and positive terminals of the power supply (battery), the power supply is recommended to use batteries or other regulated power supply. It is not recommended to use switching power supplies without filters (such as mobile phone chargers, mobile power supplies, and other switching power supplies), otherwise the interference generated by the power supply will affect the normal operation of the module. The normal operating voltage of this module is 3.0‑5.0V. Be careful not to exceed this range for the supply voltage. : Antenna The FM_ANT port is used to connect the FM antenna, for better reception of FM signal, it is recommended to connect an external 75cm length of trolley antenna. : Headphone/Speaker output This module comes with a 3Wx2 channel sound amplifier, if you need speakers access to the speaker port can be used, it is recommended to use 4Ω/3W speakers. If headphones are inserted, the sound automatically switches to the headphone channel and the speaker channel is automatically closed. Volume adjustment Turn the VOL encoder (the one on the right) to adjust the volume, while the LCD screen shows the volume level. Frequency adjustment Turn the encoder (the one on the left) to adjust the reception frequency, while the LCD screen shows the current frequency. Package List 1 x FM Receiver Module   2 x Washers 2 x Nuts  Note 1. Mute Short press VOL knob down to switch between mute, non mute 2. Automatic squelch switch Press and hold the VOL knob down to toggle the Auto Squelch function on or off, the LCD display caption ON means Auto Squelch is on, OFF means Auto Squelch is off. 3. Self acting noise threshold (threshold) adjustment (valid when the switch is on) Press and hold the knob downwards to enter the Auto Squelch threshold adjustment interface, rotate the VOL knob to adjust the action threshold of Auto Squelch according to the specific usage, the adjustment range is 0‑31, the larger the value the higher the threshold, the easier the weak signal will be muted. The opposite is true. 4. Connected to the serial port (no need to connect without serial control) The module is reserved for TTL level serial port control interface, TTL serial port communication with this module needs to connect the module's UART_RX, UART_TX and GND (marked on the corresponding position of PCB), you can use external MCU (microcontroller) or computer serial port to send commands to control the relevant functions of the module. 5. Automatic station search Short press the encoder to automatically search for local stations, while the LCD screen displays the current frequency, and stops when a valid station is searched.