FM Radio Receiver

This is part of an alarm clock radio project.

One feature of the replacement Radio Alarm Clock is:

• Play FM over-the-air Radio

  • Store a list of favorite stations

  • Seek station up or down

  • Display station

Parts

• Si4703 Board

• Earbuds

Step 1. Download and setup Raspberry Pi 3 running latest version of Rasbian

• sudo raspi-config

  • keyboard

  • timezone

  • locale

  • passwd

  • hostname

  • enable: ssh, i2c

  • resize filesystem

  • reboot

• smbus, wiringPi and i2cdetect are installed by default

Step 2. Solder Si4703 header

The Si4703 I bought came with separate header pins. Solder these pins to the board.

Step 3. Connect the Raspberry Pi GPIO pins to the Si4703 header

Use male-male jumper wires to connect the Si4703 to the Raspberry PI:

Pin 16 and GPIO23 were used in the original, but GPIO23 was used by another part of the alarm clock radio.

Step 4. Insert the earbuds in the Si4703

Step 5. Make a project directory

Login to the Raspberry Pi and make a project directory called radio

$ mkdir radio

$ cd radio

Step 6. Download the code

$ sudo wget "https://raw.githubusercontent.com/dumbo25/fmreceiver/master/radio.py"

Step 7. Run the code

$ python3 radio.py

Step 8. Listen to the radio

The next step is to add an audio amplifier.

References

• Adafruit.com Configuring I2C

• RaspberryPi.org Forums KansasCoder