Wireless Audio Transfer Using Laser Light (Arduino UNO)

January 24, 2026No comments

This project demonstrates wireless audio transmission using a laser beam.

Audio is converted into an electrical signal, modulated onto a laser, transmitted through air, and received using a light sensor. The Arduino processes the signal and outputs sound to a speaker.

How It Works (Simple Explanation)

Transmitter Side

Audio signal (from phone / mic module) goes into Arduino.
Arduino modulates the audio signal.
Laser diode intensity varies according to the audio signal.
Laser beam carries sound wirelessly.

Receiver Side

LDR / Photodiode detects laser light.
Light changes → electrical signal.
Arduino processes signal.
Amplifier boosts signal.
Speaker outputs sound.

🧩 Components Required

🔴 Transmitter

Arduino UNO
Laser Diode Module (5V)
Audio input (AUX / Microphone module)
10kΩ resistor
Breadboard
Jumper wires
Power supply / USB

🔵 Receiver

Arduino UNO
LDR or Photodiode
LM386 Audio Amplifier
8Ω Speaker
10kΩ resistor
Capacitors (10µF, 100nF)
Breadboard & wires

🔌 Circuit Diagram (Text Representation)

Transmitter Circuit


Audio Signal  ----> A0 (Arduino)
Laser +        ----> D9 (PWM)
Laser -        ----> GND

Receiver Circuit


LDR One End    ----> A0 (Arduino)
LDR Other End ----> 5V
10kΩ Resistor ----> A0 to GND

Arduino D9    ----> LM386 Input
LM386 Output  ----> Speaker

Arduino Code

🔴 Transmitter Code


const int audioPin = A0;
const int laserPin = 9;

void setup() {
  pinMode(laserPin, OUTPUT);
}

void loop() {
  int audioValue = analogRead(audioPin);
  int pwmValue = map(audioValue, 0, 1023, 0, 255);
  analogWrite(laserPin, pwmValue);
}

🔵 Receiver Code


const int ldrPin = A0;
const int speakerPin = 9;

void setup() {
  pinMode(speakerPin, OUTPUT);
}

void loop() {
  int lightValue = analogRead(ldrPin);
  int pwmValue = map(lightValue, 0, 1023, 0, 255);
  analogWrite(speakerPin, pwmValue);
}

📈 Applications

Wireless audio systems
Secure optical communication
Defense communication demo
Li-Fi technology learning
Science exhibitions & final year projects

January 21, 2026No comments

🔷 Project Overview

This system allows an ambulance to send an emergency alert wirelessly using LoRa to nearby traffic junction control units, which then automatically clear the path by turning traffic lights green and displaying emergency messages.

LoRa is used because it supports:

Long-range communication (2–10 km)
Low power
No internet required

🔷 System Block Diagram (Concept)


[ Ambulance Unit ]
Button → Arduino → LoRa TX ))))))) LoRa RX → Arduino → LCD
                                               ↓
                                         Traffic Lights

🔧 Hardware Components

🚑 Ambulance Unit (Transmitter)

Arduino UNO / Nano
LoRa Module (SX1278 / RA-02)
Emergency Push Button
Buzzer
Battery / Power Bank

🚦 Traffic Control Unit (Receiver)

Arduino UNO
LoRa Module (SX1278 / RA-02)
16x2 LCD (I2C or normal)
Red, Yellow, Green LEDs (Traffic lights)
Buzzer

🔌 LoRa Module Pin Connections (SX1278)

LoRa Pin	Arduino UNO
VCC	3.3V ⚠️
GND	GND
NSS	D10
MOSI	D11
MISO	D12
SCK	D13
DIO0	D2

⚠️ Do NOT connect LoRa to 5V

🚑 TRANSMITTER CODE (Ambulance Unit)


#include <SPI.h>
#include <LoRa.h>

#define BUTTON 4
#define BUZZER 5

void setup() {
  pinMode(BUTTON, INPUT_PULLUP);
  pinMode(BUZZER, OUTPUT);

  Serial.begin(9600);

  LoRa.setPins(10, 9, 2); // NSS, RESET, DIO0

  if (!LoRa.begin(433E6)) {
    Serial.println("LoRa Failed!");
    while (1);
  }

  Serial.println("Ambulance LoRa Ready");
}

void loop() {
  if (digitalRead(BUTTON) == LOW) {
    digitalWrite(BUZZER, HIGH);

    LoRa.beginPacket();
    LoRa.print("EMERGENCY_AMBULANCE");
    LoRa.endPacket();

    Serial.println("Emergency Sent");
    delay(2000);
    digitalWrite(BUZZER, LOW);
  }
}

🚦 RECEIVER CODE (Traffic Control Unit)


#include <SPI.h>
#include <LoRa.h>
#include <LiquidCrystal.h>

LiquidCrystal lcd(7, 6, 5, 4, 3, 2);

#define RED 8
#define YELLOW 9
#define GREEN 10
#define BUZZER 11

void setup() {
  pinMode(RED, OUTPUT);
  pinMode(YELLOW, OUTPUT);
  pinMode(GREEN, OUTPUT);
  pinMode(BUZZER, OUTPUT);

  lcd.begin(16, 2);
  lcd.print("Traffic System");

  Serial.begin(9600);

  LoRa.setPins(10, 9, 2);

  if (!LoRa.begin(433E6)) {
    lcd.print("LoRa Failed");
    while (1);
  }
}

void loop() {
  int packetSize = LoRa.parsePacket();
  if (packetSize) {
    String message = "";

    while (LoRa.available()) {
      message += (char)LoRa.read();
    }

    Serial.println(message);

    if (message == "EMERGENCY_AMBULANCE") {
      lcd.clear();
      lcd.print("EMERGENCY!");
      lcd.setCursor(0, 1);
      lcd.print("CLEAR PATH");

      digitalWrite(RED, LOW);
      digitalWrite(YELLOW, LOW);
      digitalWrite(GREEN, HIGH);
      digitalWrite(BUZZER, HIGH);

      delay(8000); // Path cleared time

      digitalWrite(GREEN, LOW);
      digitalWrite(RED, HIGH);
      digitalWrite(BUZZER, LOW);
    }
  }
}

⚙️ Working Explanation (Step-by-Step)

Ambulance driver presses emergency button
Arduino sends EMERGENCY_AMBULANCE message via LoRa
Receiver unit receives alert
Traffic light turns GREEN
LCD shows EMERGENCY – CLEAR PATH
After ambulance passes, normal traffic resumes

🏥 Applications

Smart traffic systems
Emergency vehicle priority
Smart city projects
Highway emergency management

🌟 Advantages

✔ Long range (no internet)
✔ Fast response
✔ Low power
✔ Scalable to many junctions

📌 Future Enhancements

GPS-based route optimization
Multiple junction synchronization
GSM alert to hospitals
AI-based traffic prediction

Smart Trash Bin Using Arduino UNO

January 21, 2026No comments

Project Idea

A Smart Trash Bin automatically opens its lid when it detects a person’s hand using an ultrasonic sensor. This helps maintain hygiene and is useful in smart cities, homes, schools, and offices..

🔧 Components Required

Arduino UNO
Ultrasonic Sensor (HC-SR04)
Servo Motor (SG90)
Jumper Wires
Breadboard
Dustbin + Lid (mechanical setup)
USB Cable / 5V Power Supply

⚙️ Working Principle

Ultrasonic sensor continuously measures distance.
When a hand/object comes within 15 cm, Arduino detects it.
Arduino rotates the servo motor to open the dustbin lid.
After 3 seconds, the lid closes automatically.

📐 Circuit Diagram (Connection)


HC-SR04 Ultrasonic Sensor
-------------------------
VCC  → 5V (Arduino)
GND  → GND
TRIG → Digital Pin 9
ECHO → Digital Pin 10

Servo Motor
------------
Red    → 5V
Brown  → GND
Yellow → Digital Pin 6

💻 Arduino Code (With Comments)


#include <Servo.h>

Servo myServo;

// Ultrasonic sensor pins
int trigPin = 9;
int echoPin = 10;

// Servo pin
int servoPin = 6;

long duration;
int distance;

void setup() {
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);

  myServo.attach(servoPin);
  myServo.write(0);   // Lid closed position

  Serial.begin(9600);
}

void loop() {
  // Send ultrasonic pulse
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Read echo pulse
  duration = pulseIn(echoPin, HIGH);

  // Calculate distance in cm
  distance = duration * 0.034 / 2;

  Serial.print("Distance: ");
  Serial.println(distance);

  // If object detected within 15 cm
  if (distance > 0 && distance <= 15) {
    myServo.write(90);   // Open lid
    delay(3000);         // Keep open
    myServo.write(0);    // Close lid
  }

  delay(500);
}

📌 Applications

Smart homes
Hospitals
Schools & colleges
Public places
Smart city projects

📈 Advantages

✔ Touchless operation
✔ Low cost
✔ Easy to build
✔ Hygienic solution

AI Smart Parking System with Number Plate Recognition

January 18, 2026No comments

PROJECT TITLE

AI-Based Smart Parking System with Automatic Number Plate Recognition Using Arduino and OpenCV

2️⃣ ABSTRACT

The rapid growth of vehicles has created serious parking management problems in urban areas. This project proposes an AI-based Smart Parking System that automatically detects vehicle number plates, manages parking slots, and controls entry/exit gates. The system uses OpenCV and OCR for number plate recognition and Arduino with sensors for slot detection and gate automation. Parking data is stored on a cloud server for real-time monitoring. This system reduces human effort, prevents unauthorized parking, and supports smart city infrastructure.

3️⃣ OBJECTIVES

To automatically recognize vehicle number plates
To detect parking slot availability
To control parking gate automatically
To store entry and exit data in the cloud
To reduce traffic congestion and manual work

4️⃣ HARDWARE REQUIREMENTS

Component	Quantity
Arduino UNO / ESP32	1
ESP32-CAM / USB Camera	1
IR Sensors	4
Servo Motor (Gate)	1
16×2 LCD	1
Buzzer	1
Breadboard & Jumper Wires	As required
Power Supply (5V)	1

5️⃣ SOFTWARE REQUIREMENTS

Arduino IDE
Python 3
OpenCV
Tesseract OCR
Firebase / ThingSpeak (optional)

6️⃣ SYSTEM BLOCK DIAGRAM (TEXT)


Vehicle
   ↓
Camera → OpenCV + OCR (AI)
   ↓
Recognized Number Plate
   ↓
Arduino Controller
   ↓
IR Sensors → Slot Status
   ↓
Servo Motor (Gate)
   ↓
LCD Display + Cloud Server

7️⃣ CIRCUIT CONNECTIONS

IR Sensors

IR1 → Arduino D2
IR2 → Arduino D3
IR3 → Arduino D4
IR4 → Arduino D5

Servo Motor

Signal → D9
VCC → 5V
GND → GND

LCD (16×2)

RS → D7
EN → D8
D4–D7 → D10–D13

Buzzer

Positive → D6
Negative → GND

8️⃣ WORKING PRINCIPLE

Vehicle arrives at parking gate
Camera captures vehicle image
AI processes image using OpenCV
OCR extracts number plate text
Arduino checks parking slot availability
If slot available → gate opens
If full → buzzer alert + LCD message
Entry data stored in cloud

9️⃣ AI NUMBER PLATE RECOGNITION STEPS

Image capture
Grayscale conversion
Noise removal
Edge detection
Contour detection
Character segmentation
OCR text extraction

🔟 ARDUINO CODE (GATE + SLOT CONTROL)


#include <Servo.h>
#include <LiquidCrystal.h>

Servo gate;
LiquidCrystal lcd(7,8,10,11,12,13);

int ir1 = 2;
int ir2 = 3;
int ir3 = 4;
int ir4 = 5;
int buzzer = 6;

void setup() {
  gate.attach(9);
  lcd.begin(16,2);

  pinMode(ir1, INPUT);
  pinMode(ir2, INPUT);
  pinMode(ir3, INPUT);
  pinMode(ir4, INPUT);
  pinMode(buzzer, OUTPUT);

  gate.write(0);
  lcd.print("Smart Parking");
}

void loop() {
  int slots = digitalRead(ir1)+digitalRead(ir2)+
              digitalRead(ir3)+digitalRead(ir4);

  lcd.setCursor(0,1);
  lcd.print("Free Slots:");
  lcd.print(slots);

  if(slots > 0) {
    gate.write(90);
    digitalWrite(buzzer, LOW);
  } else {
    gate.write(0);
    digitalWrite(buzzer, HIGH);
    lcd.clear();
    lcd.print("Parking Full");
    delay(2000);
  }
}

🔟 PYTHON AI CODE (NUMBER PLATE RECOGNITION)


import cv2
import pytesseract

pytesseract.pytesseract.tesseract_cmd = r'C:\Program Files\Tesseract-OCR\tesseract.exe'

img = cv2.imread("car.jpg")
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

plate_text = pytesseract.image_to_string(gray, config='--psm 8')
print("Vehicle Number:", plate_text)

cv2.imshow("Image", gray)
cv2.waitKey(0)

11️⃣ FLOWCHART (TEXT)

Start
↓
Vehicle Detected
↓
Capture Image
↓
Recognize Number Plate
↓
Check Slot Availability
↓
Slot Available?
→ Yes → Open Gate
→ No → Display FULL
↓
Store Data
↓
Stop

12️⃣ ADVANTAGES

Fully automatic system
Reduces manpower
Accurate parking management
Smart city compatible
Scalable and secure

13️⃣ APPLICATIONS

Shopping malls
Airports
Hospitals
Offices
Smart cities

14️⃣ FUTURE SCOPE

Mobile app integration
Payment gateway
Face recognition
EV charging slot detection
Cloud analytics

15️⃣ CONCLUSION

The AI Smart Parking System efficiently manages parking spaces using artificial intelligence and IoT technology. The system reduces traffic congestion, improves security, and provides a smart solution for modern parking problems.

Automatic Power Source Selector (Mains / Solar / Generator) using Arduino

January 16, 2026No comments

🎯 Project Objective

To automatically switch the load to the available power source in the following priority order:

Mains Power (Highest Priority)
Solar Inverter
Generator (Backup)

No manual switching required.

🧠 Working Principle (Simple)

Arduino continuously checks voltage availability of:
- Mains
- Solar Inverter
- Generator
Based on priority:
- If Mains ON → Load connects to Mains
- Else if Solar ON → Load connects to Solar
- Else if Generator ON → Load connects to Generator
Switching is done using relay modules

🧩 Required Components

Component	Quantity
Arduino UNO / Nano	1
5V Relay Module (3-Channel)	1
AC Voltage Sensor / Optocoupler (PC817)	3
Resistors (1k, 10k)	As needed
Diodes (1N4007)	3
LED Indicators	3
Buzzer (Optional)	1
AC Sources (Mains, Solar, Generator)	—
Load (Bulb/Fan)	1

🔄 System Block Diagram


 MAINS AC ──┐
            │
 SOLAR AC ──┼──> Voltage Sensors ──> Arduino UNO
            │
 GENERATOR ─┘

 Arduino Outputs
   │
   ├── Relay 1 → Mains
   ├── Relay 2 → Solar
   └── Relay 3 → Generator

 Selected Source ──> LOAD

⚡ Circuit Diagram (Text Representation)


MAINS AC ----[Optocoupler]---- D2 (Arduino)
SOLAR AC ----[Optocoupler]---- D3 (Arduino)
GEN AC  ----[Optocoupler]---- D4 (Arduino)

Arduino D8 ---- Relay 1 (Mains)
Arduino D9 ---- Relay 2 (Solar)
Arduino D10 --- Relay 3 (Generator)

Relay COM → Load
Relay NO  → Respective Power Source

⚠ Important:
Never connect AC directly to Arduino. Use Optocouplers / Voltage Sensors only.

🧑‍💻 Arduino Code (Working)


// Auto Power Source Switching System

int mainsPin = 2;
int solarPin = 3;
int genPin   = 4;

int relayMains = 8;
int relaySolar = 9;
int relayGen   = 10;

void setup() {
  pinMode(mainsPin, INPUT);
  pinMode(solarPin, INPUT);
  pinMode(genPin, INPUT);

  pinMode(relayMains, OUTPUT);
  pinMode(relaySolar, OUTPUT);
  pinMode(relayGen, OUTPUT);

  digitalWrite(relayMains, LOW);
  digitalWrite(relaySolar, LOW);
  digitalWrite(relayGen, LOW);
}

void loop() {

  int mains = digitalRead(mainsPin);
  int solar = digitalRead(solarPin);
  int gen   = digitalRead(genPin);

  if (mains == HIGH) {
    switchMains();
  }
  else if (solar == HIGH) {
    switchSolar();
  }
  else if (gen == HIGH) {
    switchGenerator();
  }
  else {
    allOff();
  }
}

void switchMains() {
  digitalWrite(relayMains, HIGH);
  digitalWrite(relaySolar, LOW);
  digitalWrite(relayGen, LOW);
}

void switchSolar() {
  digitalWrite(relayMains, LOW);
  digitalWrite(relaySolar, HIGH);
  digitalWrite(relayGen, LOW);
}

void switchGenerator() {
  digitalWrite(relayMains, LOW);
  digitalWrite(relaySolar, LOW);
  digitalWrite(relayGen, HIGH);
}

void allOff() {
  digitalWrite(relayMains, LOW);
  digitalWrite(relaySolar, LOW);
  digitalWrite(relayGen, LOW);
}

Example Scenario

Mains	Solar	Generator	Output
ON	ON	ON	Mains
OFF	ON	ON	Solar
OFF	OFF	ON	Generator
OFF	OFF	OFF	Power OFF

📌 Applications

Home UPS systems
Solar power systems
Industries & factories
Hospitals
Rural electrification

DIY FM Radio using RDA5807M & Arduino NANO

January 14, 2026No comments

🔹 Project Overview

This project demonstrates how to build a digital FM radio using the RDA5807M FM receiver module controlled by an Arduino Nano via I2C communication. You can tune FM stations, increase/decrease frequency, and display station info.

🔧 Required Components

Component	Quantity
Arduino Nano	1
RDA5807M FM Radio Module	1
Push Buttons (Next / Previous)	2
10kΩ Resistors	2
OLED Display (0.96" I2C) (optional)	1
Breadboard	1
Jumper Wires	As needed
Antenna wire (20–30 cm)	1
USB Cable	1

🔌 Pin Connections

🔹 RDA5807M → Arduino Nano

RDA5807M	Arduino Nano
VCC	3.3V
GND	GND
SDA	A4
SCL	A5
ANT	Long wire (antenna)

⚠️ Important: Use 3.3V only. Do NOT connect to 5V.

🔹 Buttons Connection

Button	Arduino Pin
Next Station	D2
Previous Station	D3

Use INPUT_PULLUP mode (no external resistor needed).

📡 FM Frequency Range

87.0 MHz – 108.0 MHz
Step size: 0.1 MHz

💻 Arduino Code (RDA5807M FM Radio)


#include <Wire.h>
#include <RDA5807M.h>

RDA5807M radio;

float frequency = 98.3;   // Start FM frequency

void setup() {
  Wire.begin();
  radio.setup();
  radio.setVolume(8);     // Volume range 0–15
  radio.setFrequency(frequency);

  pinMode(2, INPUT_PULLUP); // Next
  pinMode(3, INPUT_PULLUP); // Previous
}

void loop() {
  if (digitalRead(2) == LOW) {
    frequency += 0.1;
    if (frequency > 108.0) frequency = 87.0;
    radio.setFrequency(frequency);
    delay(300);
  }

  if (digitalRead(3) == LOW) {
    frequency -= 0.1;
    if (frequency < 87.0) frequency = 108.0;
    radio.setFrequency(frequency);
    delay(300);
  }
}

📚 Required Library

Install RDA5807M Library from Arduino Library Manager:

Sketch → Include Library → Manage Libraries
Search: RDA5807M

📸 Project Features

✔ Digital FM Tuning
✔ Compact & Low Power
✔ Arduino Controlled
✔ Can add OLED display
✔ Excellent for IoT & Embedded learning

Intelligent Agriculture Monitoring System using Arduino

January 12, 2026No comments

Project Objective

To monitor soil moisture, temperature, humidity, and light in a farm and automatically control irrigation using Arduino.
This helps farmers save water, increase crop yield, and reduce manual work.

🧠 Working Principle (Simple)

Sensors collect real-time data from the field
Arduino processes the data
If soil is dry → water pump ON
If soil is wet → pump OFF
Data can be shown on LCD / mobile app (optional IoT)

🔧 Components Required

Component	Quantity
Arduino UNO	1
Soil Moisture Sensor	1
DHT11 (Temp & Humidity)	1
LDR (Light Sensor)	1
Relay Module (5V)	1
Water Pump (DC)	1
16x2 LCD (optional)	1
9V Battery / Adapter	1
Jumper Wires	As required
Breadboard	1

🔌 Block Diagram (Concept)


Soil Sensor ─┐
DHT11 ──────┼──► Arduino UNO ───► Relay ───► Water Pump
LDR ────────┘
                  │
                  └──► LCD Display

⚙️ Circuit Connections (Summary)

Soil Sensor
- VCC → 5V
- GND → GND
- A0 → Arduino A0
DHT11
- Data → D2
- VCC → 5V
- GND → GND
Relay Module
- IN → D8
- VCC → 5V
- GND → GND
Water Pump
- Connected through relay (NO & COM)

💻 Arduino Code (Simple)


#include <DHT.h>

#define DHTPIN 2
#define DHTTYPE DHT11
#define SOIL A0
#define RELAY 8

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  pinMode(RELAY, OUTPUT);
  digitalWrite(RELAY, HIGH);
  Serial.begin(9600);
  dht.begin();
}

void loop() {
  int soilValue = analogRead(SOIL);
  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  Serial.print("Soil: ");
  Serial.print(soilValue);
  Serial.print(" Temp: ");
  Serial.print(temp);
  Serial.print(" Humidity: ");
  Serial.println(hum);

  if (soilValue > 600) {
    digitalWrite(RELAY, LOW); // Pump ON
  } else {
    digitalWrite(RELAY, HIGH); // Pump OFF
  }

  delay(2000);
}

📊 Output

Automatically waters plants when soil is dry
Displays temperature & humidity
Saves water and electricity

🎓 Applications

Smart farming 🌾
Greenhouses
Home gardening
Agricultural research
IoT-based smart villages

⭐ Advantages

✔ Low cost
✔ Automatic irrigation
✔ Easy to build
✔ Student-friendly
✔ Expandable to IoT

Social Profiles

Labels

Blog Archive

Recent Posts

Download

How It Works (Simple Explanation)

Transmitter Side

Receiver Side

🧩 Components Required

🔴 Transmitter

🔵 Receiver

🔌 Circuit Diagram (Text Representation)

Transmitter Circuit

Receiver Circuit

Arduino Code

🔴 Transmitter Code

🔵 Receiver Code

📈 Applications

🔷 Project Overview

🔷 System Block Diagram (Concept)

🔧 Hardware Components

🚑 Ambulance Unit (Transmitter)

🚦 Traffic Control Unit (Receiver)

🔌 LoRa Module Pin Connections (SX1278)

🚑 TRANSMITTER CODE (Ambulance Unit)

🚦 RECEIVER CODE (Traffic Control Unit)

⚙️ Working Explanation (Step-by-Step)

🏥 Applications

🌟 Advantages

📌 Future Enhancements

Project Idea

🔧 Components Required

⚙️ Working Principle

📐 Circuit Diagram (Connection)

💻 Arduino Code (With Comments)

📌 Applications

📈 Advantages

PROJECT TITLE

3️⃣ OBJECTIVES

4️⃣ HARDWARE REQUIREMENTS

5️⃣ SOFTWARE REQUIREMENTS

6️⃣ SYSTEM BLOCK DIAGRAM (TEXT)

7️⃣ CIRCUIT CONNECTIONS

IR Sensors

Servo Motor

LCD (16×2)

Buzzer

8️⃣ WORKING PRINCIPLE

9️⃣ AI NUMBER PLATE RECOGNITION STEPS

🔟 ARDUINO CODE (GATE + SLOT CONTROL)

🔟 PYTHON AI CODE (NUMBER PLATE RECOGNITION)

11️⃣ FLOWCHART (TEXT)

12️⃣ ADVANTAGES

13️⃣ APPLICATIONS

14️⃣ FUTURE SCOPE

15️⃣ CONCLUSION

🎯 Project Objective

🧠 Working Principle (Simple)

🧩 Required Components

🔄 System Block Diagram

⚡ Circuit Diagram (Text Representation)

🧑‍💻 Arduino Code (Working)

Example Scenario

📌 Applications

🔹 Project Overview

🔧 Required Components

🔌 Pin Connections

🔹 RDA5807M → Arduino Nano

🔹 Buttons Connection

📡 FM Frequency Range

💻 Arduino Code (RDA5807M FM Radio)

📚 Required Library

📸 Project Features

Project Objective

🧠 Working Principle (Simple)

🔧 Components Required

🔌 Block Diagram (Concept)

⚙️ Circuit Connections (Summary)

💻 Arduino Code (Simple)

📊 Output