Arduino Based FM Radio using RDA5807

This project creates a fully functional FM radio receiver by combining digital tuning control with analog audio amplification. At the heart of the system is the Arduino Nano, which acts as the central controller. Using the Wire library, the Arduino communicates with the RDA5807 FM receiver module over the I2C protocol. The RDA5807 is a single-chip broadcast FM stereo radio tuner that handles the complex RF demodulation, capturing radio waves, filtering out unwanted frequencies, and extracting the raw audio signal from the chosen broadcast station. Because the audio signal outputted by the receiver module is relatively weak, it is routed into an LM386 audio amplifier circuit. The LM386 boosts the audio signal so it has enough power to drive a speaker or output clear sound. Two 100K potentiometers are integrated into the setup to allow manual user control, typically used for adjusting volume levels or tuning frequencies. A 0.1uF ceramic capacitor is included in the circuit for power supply decoupling and noise filtering, ensuring a stable operation. Everything is wired together on a perf board to create a permanent, compact audio device.