Make an Arduino FM Radio! (using TEA5767)

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Introduction: Make an Arduino FM Radio! (using TEA5767)

About: I am very athletic and enjoy sports. I often participate in many different activities and love to be busy all day. I enjoy to wake up and greet every morning with a smile.

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);
}

Step 3: Final Pictures!

Here some nice pictures and teh radio with the shield totally functional!

ESPECIAL NOTES:

*Remember to use an a good audio amplifier for the output of the TEA5767 FM Radio Module

*Vcc= 3.3 TO 5 Volts maximun for the power of the TEA5767 Radio Module

*To use a good onmidirectional antenna

*The radio doesn't have an automatic searh for the FM stations but it's modifficable by the program

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13 Comments

What's the code to add for fm automatic search?
Thks

Question: say youre putting left and right audio to an amp, would you run one of the ground pins to the audio input on the amp?

2 replies

If the amp is stereo you can connect each wire to each channel, but if you amp is mono put a 10 ohms resistor on the output of thr two channels and solder it together

I ended up figuring it out it was a silly question i should have known since ive built many amps from scratch.

Origionally i could not get this sketch to work but its because i was not using the right pins for sda and scl (i had an ardruino mega). I tried 4 other sketches before i found that out then got other ones to work but ultimately went back to your design and it is by far the best and cleanest signal with your code ! Im working on making an fm radio with aux and bluetooth and also display time and temp/humidity on the lcd (although im not sure how to code in all the screen changes). Thanks for this tutorial !

What is the language of the code? Thanks

2 replies

#C modified for the arduino enviroment development

Nice arduino work.
Keep up the good work

1 reply

Thanks man, i'll do more proyect when i have more time :)