How to Build a Simple FM Radio Receiver with an Arduino


Building a simple FM radio receiver with an Arduino is a great electronics project that allows you to listen to FM radio stations using components you can easily obtain. In this article, I will walk you through the entire process of building your own FM radio receiver using an Arduino Uno board and a few additional components.

What You Will Need

To build the FM radio receiver, you will need:

FM Radio Module Pins

The FM radio module will have several pins that need to be connected to the Arduino:

Arduino Code

You will need to upload code to the Arduino to receive the FM signals and output the audio. The Arduino code will:

Many code examples are available online for interfacing with FM modules like the RDA5807M or TEA5767. The code handles the complex signal processing.

Circuit Assembly

Here are the steps to assemble the circuit:

  1. Insert the Arduino and FM module into the breadboard.

  2. Connect the module GND and VCC pins to Arduino GND and 5V pins.

  3. Connect SCL and SDA to Arduino SCL and SDA pins. For Arduino Uno, that is A5 and A4 respectively.

  4. Connect the ANT pin to one end of the wire antenna.

  5. Connect the potentiometer, speaker, and capacitor to the breadboard as shown in the circuit diagram.

  6. Upload the Arduino code to interface with the FM module.

Once assembled, your Arduino FM radio receiver is ready! The code will scan for the strongest signal and you should hear the closest radio station playing through the speaker.

How the FM Radio Receiver Works

Here is a brief overview of how the components work together:

Improving the Radio Receiver

To improve reception and audio quality, you can:

With these enhancements, you can turn your simple Arduino FM radio into a high quality tuner!


Building an FM radio receiver with an Arduino is an enlightening electronics project that teaches you a ton about radio communications. By following this guide, assembling the circuit, and uploading the Arduino code, you can get your own FM radio prototype up and running very quickly. Then have fun exploring the capabilities by tweaking the antenna, adding amplifiers, and upgrading components for the best reception.