Make an Arduino FM Radio! (using TEA5767)

Hi guys from Instructables, In this tutorial i'll show you how to make a FM digital Radio easily using arduino uno (or any other arduino board), and the TEA5667 Fm Radio module, and audio amplifier and a LCD 16X2.

Let´s start !

Step 1: Block Diagram & Connections.

First, the part list of needed electronic components:

-Arduino UNO, or any other similar board friendly with the arduino enviroment.

-TEA5767 FM Radio module

-16X2 LCD

-2 Buttons Normally open (NA) or push buttons

-330 ohms resistor

-2x 10 k ohms reisistor

-Jumper wires

-Switch for to power on the radio

-Led(as a power on indicator).

-A free weekend or day :)

Step 2: Arduino Program & Libraries

*First you'll need to install the librarys on the arduino IDE and later compile and upload the program*

The code in text is here:

/*+-10--9--8--7--6-+
|  +------+  ++  |
|  | TEA  |  ||  |
|  | 5767 |  ||  |
|  +------+  ++  |
+--1--2--3--4--5-+

1 ----> Arduino SDA (pin A5 arduino uno)
2 ----> Arduino SCL (pin A4 arduino uno)
3 ----> GND
5 ----> +3.3 V
6 ----> GND
7 ----> Audio out (right channel)
8 ----> Audio out (left channel)
10 ---> Antenna 
 * LCD RS pin to digital pin 12
 * LCD Enable pin to digital pin 11
 * LCD D4 pin to digital pin 5
 * LCD D5 pin to digital pin 4
 * LCD D6 pin to digital pin 3
 * LCD D7 pin to digital pin 2
 * LCD R/W pin to ground
 * ends to +5V and ground
 * UP SEARCH (A0)
 * DOWN SEARCH (A1)
 * ALL RESISTOR ARE 10K AND PUSH BUTTON IN PULL DOWN MODE
 */

#include<Wire.h>

#include <TEA5767Radio.h> 

#include <LiquidCrystal.h>

TEA5767Radio radio = TEA5767Radio();            
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);              
float frequency = 0;                            
int fUP = A0;                                   
int fDOWN = A1;                                
int count = 0;                                   
void setup()
{
  delay(1000);
  Wire.begin();
  frequency = 91.1;                       //starting frequency
  radio.setFrequency(frequency);
  lcd.begin(16,2);
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("FM: ");
  lcd.setCursor(0, 1);
  lcd.print(frequency);
}void loop()
{
  
  if(digitalRead(fUP))                      
  {
    count=0;
    while (digitalRead(fUP))
    {
      count++;
      if(count > 0 && count <= 6)          
      {
        frequency += 0.1;
        frequencyUpdate();
        delay(200);
      }
      else if (count > 6 && count <= 2)   
      {
        frequency += 0.1;
        frequencyUpdate();
        delay(80);
      }
      else                                
      {
        frequency += 0.1;
        frequencyUpdate();
        delay(5);
      }
    }}
  
  
  
   if(digitalRead(fDOWN))                   
   {
     count = 0;
    while (digitalRead(fDOWN))            
    {
      count--;
      if(count < 0 && count >= -6)
      {
        frequency -= 0.1;
        frequencyUpdate();
        delay(200);
      }
      else if (count < -6 && count >= -12)
      {
        frequency -= 0.1;
        frequencyUpdate();
        delay(80);
      }
      else                                 
      {
        frequency -= 0.1;
        frequencyUpdate();
        delay(5);
      }
    }
   }  
  
}
void frequencyUpdate()                    //this function changes the frequency of the station, is called by preset and frequency up/down conditions.
{
  frequency = constrain(frequency, 88.0, 108.0);
  lcd.setCursor(0,0);
  lcd.print("ESTACION DE FM:");
  lcd.setCursor(0,1);
  lcd.print(frequency);
  radio.setFrequency(frequency);
}