Digital FM Radio

Arduino Digital FM Radio Receiver

Dec 16, 2020

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Components and supplies

Rotary potentiometer (generic)

Development Board, Class D Audio Amplifier Module

Alphanumeric LCD, 16 x 2

Speaker, Piezo

tea5767 FM RADIO IC

Rotary Encoder with Push-Button

Toggle Switch, (On)-Off-(On)

Antenna, Cellular / LTE

Arduino Nano R3

Li-Ion Battery 100mAh

Apps and platforms

Arduino IDE

Project description

Code

digital radio code

arduino

copy and paste

1// This project is in public Domain //
2// Project Designer... Ramji  Patel376//
3//visit Arduino.cc and project Hub//
4#include <Wire.h>
5#include  <LiquidCrystal.h>
6#define clk 2
7#define dt 3
8#define sw 4
9
10LiquidCrystal  lcd(5,6,7,8,9,10);
11
12double frequency;
13unsigned char frequencyH = 0;
14unsigned  char frequencyL = 0;
15unsigned int frequencyB;
16volatile boolean TurnDetected;
17volatile  boolean up;
18
19void isr0 ()  {
20  TurnDetected = true;
21  up = (digitalRead(clk)  == digitalRead(dt));
22}
23void setFrequency()  {
24  frequencyB = 4 * (frequency  * 1000000 + 225000) / 32768;
25  frequencyH = frequencyB >> 8;
26  frequencyL  = frequencyB & 0XFF;
27  Wire.beginTransmission(0x60);
28  Wire.write(frequencyH);
29  Wire.write(frequencyL);
30  Wire.write(0xB0);
31  Wire.write(0x10);
32  Wire.write((byte)0x00);
33  Wire.endTransmission(); 
34} 
35void displaydata(){
36 lcd.setCursor(1,0);
37  lcd.print("FM:");
38 lcd.print(frequency);
39} 
40void setup() {
41  Wire.begin();
42  lcd.begin(16, 2);
43  pinMode(clk,INPUT);
44  pinMode(dt,INPUT);  
45  pinMode(sw,INPUT);  //frequency mode
46  frequency = 92.7; //starting Frequency
47  setFrequency();
48  displaydata();
49  attachInterrupt (0,isr0,FALLING);
50}
51void loop() {
52if  (TurnDetected){
53  if(up){
54    if (frequency >= 107.90){
55    setFrequency();
56    displaydata();}
57    else{   
58      frequency = frequency + 0.1;
59      setFrequency();
60      displaydata();}}
61   else{
62      if (frequency <= 87.6){
63        setFrequency();
64        displaydata();}
65      else{
66      frequency = frequency - 0.1;
67      setFrequency();
68      displaydata();}
69      }
70      TurnDetected  = false;
71    }
72}
73
74
75    
76  
77

// This project is in public Domain //
// Project Designer... Ramji  Patel376//
//visit Arduino.cc and project Hub//
#include <Wire.h>
#include  <LiquidCrystal.h>
#define clk 2
#define dt 3
#define sw 4

LiquidCrystal  lcd(5,6,7,8,9,10);

double frequency;
unsigned char frequencyH = 0;
unsigned  char frequencyL = 0;
unsigned int frequencyB;
volatile boolean TurnDetected;
volatile  boolean up;

void isr0 ()  {
  TurnDetected = true;
  up = (digitalRead(clk)  == digitalRead(dt));
}
void setFrequency()  {
  frequencyB = 4 * (frequency  * 1000000 + 225000) / 32768;
  frequencyH = frequencyB >> 8;
  frequencyL  = frequencyB & 0XFF;
  Wire.beginTransmission(0x60);
  Wire.write(frequencyH);
  Wire.write(frequencyL);
  Wire.write(0xB0);
  Wire.write(0x10);
  Wire.write((byte)0x00);
  Wire.endTransmission(); 
} 
void displaydata(){
 lcd.setCursor(1,0);
  lcd.print("FM:");
 lcd.print(frequency);
} 
void setup() {
  Wire.begin();
  lcd.begin(16, 2);
  pinMode(clk,INPUT);
  pinMode(dt,INPUT);  
  pinMode(sw,INPUT);  //frequency mode
  frequency = 92.7; //starting Frequency
  setFrequency();
  displaydata();
  attachInterrupt (0,isr0,FALLING);
}
void loop() {
if  (TurnDetected){
  if(up){
    if (frequency >= 107.90){
    setFrequency();
    displaydata();}
    else{   
      frequency = frequency + 0.1;
      setFrequency();
      displaydata();}}
   else{
      if (frequency <= 87.6){
        setFrequency();
        displaydata();}
      else{
      frequency = frequency - 0.1;
      setFrequency();
      displaydata();}
      }
      TurnDetected  = false;
    }
}

digital radio code

arduino

copy and paste

1// This project is in public Domain //
2// Project Designer... Ramji   Patel376//
3//visit Arduino.cc and project Hub//
4#include <Wire.h>
5#include   <LiquidCrystal.h>
6#define clk 2
7#define dt 3
8#define sw 4
9
10LiquidCrystal   lcd(5,6,7,8,9,10);
11
12double frequency;
13unsigned char frequencyH = 0;
14unsigned   char frequencyL = 0;
15unsigned int frequencyB;
16volatile boolean TurnDetected;
17volatile   boolean up;
18
19void isr0 ()  {
20  TurnDetected = true;
21  up = (digitalRead(clk)   == digitalRead(dt));
22}
23void setFrequency()  {
24  frequencyB = 4 * (frequency   * 1000000 + 225000) / 32768;
25  frequencyH = frequencyB >> 8;
26  frequencyL   = frequencyB & 0XFF;
27  Wire.beginTransmission(0x60);
28  Wire.write(frequencyH);
29   Wire.write(frequencyL);
30  Wire.write(0xB0);
31  Wire.write(0x10);
32  Wire.write((byte)0x00);
33   Wire.endTransmission(); 
34} 
35void displaydata(){
36 lcd.setCursor(1,0);
37   lcd.print("FM:");
38 lcd.print(frequency);
39} 
40void setup() {
41  Wire.begin();
42   lcd.begin(16, 2);
43  pinMode(clk,INPUT);
44  pinMode(dt,INPUT);  
45  pinMode(sw,INPUT);   //frequency mode
46  frequency = 92.7; //starting Frequency
47  setFrequency();
48   displaydata();
49  attachInterrupt (0,isr0,FALLING);
50}
51void loop() {
52if   (TurnDetected){
53  if(up){
54    if (frequency >= 107.90){
55    setFrequency();
56     displaydata();}
57    else{   
58      frequency = frequency + 0.1;
59      setFrequency();
60       displaydata();}}
61   else{
62      if (frequency <= 87.6){
63        setFrequency();
64         displaydata();}
65      else{
66      frequency = frequency - 0.1;
67       setFrequency();
68      displaydata();}
69      }
70      TurnDetected   = false;
71    }
72}
73
74
75    
76  
77

// This project is in public Domain //
// Project Designer... Ramji   Patel376//
//visit Arduino.cc and project Hub//
#include <Wire.h>
#include   <LiquidCrystal.h>
#define clk 2
#define dt 3
#define sw 4

LiquidCrystal   lcd(5,6,7,8,9,10);

double frequency;
unsigned char frequencyH = 0;
unsigned   char frequencyL = 0;
unsigned int frequencyB;
volatile boolean TurnDetected;
volatile   boolean up;

void isr0 ()  {
  TurnDetected = true;
  up = (digitalRead(clk)   == digitalRead(dt));
}
void setFrequency()  {
  frequencyB = 4 * (frequency   * 1000000 + 225000) / 32768;
  frequencyH = frequencyB >> 8;
  frequencyL   = frequencyB & 0XFF;
  Wire.beginTransmission(0x60);
  Wire.write(frequencyH);
   Wire.write(frequencyL);
  Wire.write(0xB0);
  Wire.write(0x10);
  Wire.write((byte)0x00);
   Wire.endTransmission(); 
} 
void displaydata(){
 lcd.setCursor(1,0);
   lcd.print("FM:");
 lcd.print(frequency);
} 
void setup() {
  Wire.begin();
   lcd.begin(16, 2);
  pinMode(clk,INPUT);
  pinMode(dt,INPUT);  
  pinMode(sw,INPUT);   //frequency mode
  frequency = 92.7; //starting Frequency
  setFrequency();
   displaydata();
  attachInterrupt (0,isr0,FALLING);
}
void loop() {
if   (TurnDetected){
  if(up){
    if (frequency >= 107.90){
    setFrequency();
     displaydata();}
    else{   
      frequency = frequency + 0.1;
      setFrequency();
       displaydata();}}
   else{
      if (frequency <= 87.6){
        setFrequency();
         displaydata();}
      else{
      frequency = frequency - 0.1;
       setFrequency();
      displaydata();}
      }
      TurnDetected   = false;
    }
}

Downloadable files

digital radio circuit

you can download it from easy eda website

digital radio circuit

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