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  • Author Author: Steve524
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Old Battleship Phone With Arduino UNO

Steve524
Old Battleship Phone With Arduino UNO

This is an old restoration project of an old battleship phone which I retrofitted with an Arduino UNO and a BCD MP3 player module. The front of the phone has a selector switch which I tied to the inputs of the Arduino which then sends a BCD code to the MP3 module to select audio from one of the 12 positions. The audio I selected for each of the 12 positions is a different SIT tone (Situation Information Tone) used by the landline phones, you may recall what it is with the tones you hear when you mis-dial or no one is at the phone number you called. Two of the 12 samples are attached below.

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Fullscreen Old_Ship_Phone.txt Download 
                       //INPUTS
const int ssp01 = 21;  //selector switch position 1
const int ssp02 = 22;  //selector switch position 2
const int ssp03 = 23;  //selector switch position 3
const int ssp04 = 24;  //selector switch position 4
const int ssp05 = 25;  //selector switch position 5
const int ssp06 = 26;  //selector switch position 6
const int ssp07 = 27;  //selector switch position 7
const int ssp08 = 28;  //selector switch position 8
const int ssp09 = 29;  //selector switch position 9
const int ssp10 = 30;  //selector switch position 10
const int ssp11 = 31;  //selector switch position 11
const int ssp12 = 32;  //selector switch position 12
const int LED33 = 33;  //Busy LED 33

                   //INPUT VALs
int ssp01val = 0;  //selector switch position 1   val
int ssp02val = 0;  //selector switch position 2   val
int ssp03val = 0;  //selector switch position 3   val
int ssp04val = 0;  //selector switch position 4   val   
int ssp05val = 0;  //selector switch position 5   val
int ssp06val = 0;  //selector switch position 6   val
int ssp07val = 0;  //selector switch position 7   val
int ssp08val = 0;  //selector switch position 8   val
int ssp09val = 0;  //selector switch position 9   val
int ssp10val = 0;  //selector switch position 10  val
int ssp11val = 0;  //selector switch position 11  val
int ssp12val = 0;  //selector switch position 12  val
int LED33val = 0;  //Busy LED 33    val

                       //OUTPUTS
const int op01 = 2;    //output pin d2
const int op02 = 3;    //output pin d3
const int op03 = 4;    //output pin d4
const int op04 = 5;    //output pin d5
const int op05 = 6;    //output pin d6
const int op06 = 7;    //output pin d7
const int op07 = 8;    //output pin d8
const int op08 = 9;    //output pin d9
const int op09 = 13;   //output pin d13 Busy LED 13

                //OUTPUT VALs
int op01val;    //output pin d2    val
int op02val;    //output pin d3    val
int op03val;    //output pin d4    val
int op04val;    //output pin d5    val
int op05val;    //output pin d6    val
int op06val;    //output pin d7    val
int op07val;    //output pin d8    val
int op08val;    //output pin d9    val
int op09val;    //output pin d13   val Busy LED 13

void setup()
 {
Serial.begin(9600);
pinMode(ssp01,INPUT_PULLUP);  //21 Input pins
pinMode(ssp02,INPUT_PULLUP);  //22
pinMode(ssp03,INPUT_PULLUP);  //23
pinMode(ssp04,INPUT_PULLUP);  //24
pinMode(ssp05,INPUT_PULLUP);  //25
pinMode(ssp06,INPUT_PULLUP);  //26
pinMode(ssp07,INPUT_PULLUP);  //27
pinMode(ssp08,INPUT_PULLUP);  //28
pinMode(ssp09,INPUT_PULLUP);  //29
pinMode(ssp10,INPUT_PULLUP);  //30
pinMode(ssp11,INPUT_PULLUP);  //31
pinMode(ssp12,INPUT_PULLUP);  //32
pinMode(LED33,INPUT);         //33 LED Busy pin input value 

pinMode(op01,OUTPUT);
pinMode(op02,OUTPUT);
pinMode(op03,OUTPUT);
pinMode(op04,OUTPUT);
pinMode(op05,OUTPUT);
pinMode(op06,OUTPUT);
pinMode(op07,OUTPUT);
pinMode(op08,OUTPUT);
pinMode(op09,OUTPUT);
  }

void loop() {

    op01val = digitalRead(op01);  
    op02val = digitalRead(op02);
    op03val = digitalRead(op03);
    op04val = digitalRead(op04);
    op05val = digitalRead(op05);
    op06val = digitalRead(op06);
    op07val = digitalRead(op07);
    op08val = digitalRead(op08);
    op09val = digitalRead(op09);
        
    Serial.print("op01 ");     // Serial.print output stuff
    Serial.print(op01val);
    Serial.print(" ");
    Serial.print("op02 ");
    Serial.print(op02val);
    Serial.print(" ");
    Serial.print("op03 ");
    Serial.print(op03val);
    Serial.print(" ");
    Serial.print("op04 ");
    Serial.print(op04val);
    Serial.print(" ");
    Serial.print("op05 ");
    Serial.print(op05val);
    Serial.print(" ");
    Serial.print("op06 ");
    Serial.print(op06val);
    Serial.print(" ");
    Serial.print("op07 ");
    Serial.print(op07val);
    Serial.print(" ");
    Serial.print("op08 ");
    Serial.print(op08val);
    Serial.print(" ");
    Serial.print("op09LED ");
    Serial.println(op09val);   
    
  ssp01val = digitalRead(ssp01);        
  if(ssp01val == LOW)           // 11111110 (Message1 00001.mp3)
  {
    digitalWrite(op01, LOW);    // 0 
    digitalWrite(op02, HIGH);   // 1
    digitalWrite(op03, HIGH);   // 1
    digitalWrite(op04, HIGH);   // 1
    digitalWrite(op05, HIGH);   // 1
    digitalWrite(op06, HIGH);   // 1
    digitalWrite(op07, HIGH);   // 1
    digitalWrite(op08, HIGH);   // 1
  }
  ssp02val = digitalRead(ssp02);
  if(ssp02val == LOW)           // 11111101 (Message2 00002.mp3)
  {
    digitalWrite(op01, HIGH);   // 1 
    digitalWrite(op02, LOW);    // 0
    digitalWrite(op03, HIGH);   // 1
    digitalWrite(op04, HIGH);   // 1
    digitalWrite(op05, HIGH);   // 1
    digitalWrite(op06, HIGH);   // 1
    digitalWrite(op07, HIGH);   // 1
    digitalWrite(op08, HIGH);   // 1
  }  
  ssp03val = digitalRead(ssp03);
  if(ssp03val == LOW)           // 11111100 (Message1 00003.mp3)
  {
    digitalWrite(op01, LOW);    // 0 
    digitalWrite(op02, LOW);    // 0
    digitalWrite(op03, HIGH);   // 1
    digitalWrite(op04, HIGH);   // 1
    digitalWrite(op05, HIGH);   // 1
    digitalWrite(op06, HIGH);   // 1
    digitalWrite(op07, HIGH);   // 1
    digitalWrite(op08, HIGH);   // 1
  }
  ssp04val = digitalRead(ssp04);
  if(ssp04val == LOW)           // 11111011 (Message1 00004.mp3)
  {
    digitalWrite(op01, HIGH);   // 1 
    digitalWrite(op02, HIGH);   // 1
    digitalWrite(op03, LOW);    // 0
    digitalWrite(op04, HIGH);   // 1
    digitalWrite(op05, HIGH);   // 1
    digitalWrite(op06, HIGH);   // 1
    digitalWrite(op07, HIGH);   // 1
    digitalWrite(op08, HIGH);   // 1
  }
  ssp05val = digitalRead(ssp05);
  if(ssp05val == LOW)           // 11111010 (Message1 00005.mp3)
  {
    digitalWrite(op01, LOW);    // 0 
    digitalWrite(op02, HIGH);   // 1
    digitalWrite(op03, LOW);    // 0
    digitalWrite(op04, HIGH);   // 1
    digitalWrite(op05, HIGH);   // 1
    digitalWrite(op06, HIGH);   // 1
    digitalWrite(op07, HIGH);   // 1
    digitalWrite(op08, HIGH);   // 1
  }
  ssp06val = digitalRead(ssp06);
  if(ssp06val == LOW)           // 11111001 (Message1 00006.mp3)
  {
    digitalWrite(op01, HIGH);   // 1 
    digitalWrite(op02, LOW);    // 0
    digitalWrite(op03, LOW);    // 0
    digitalWrite(op04, HIGH);   // 1
    digitalWrite(op05, HIGH);   // 1
    digitalWrite(op06, HIGH);   // 1
    digitalWrite(op07, HIGH);   // 1
    digitalWrite(op08, HIGH);   // 1
  }
  ssp07val = digitalRead(ssp07);
  if(ssp07val == LOW)           // 11111000 (Message1 00007.mp3)
  {
    digitalWrite(op01, LOW);    // 0 
    digitalWrite(op02, LOW);    // 0
    digitalWrite(op03, LOW);    // 0
    digitalWrite(op04, HIGH);   // 1
    digitalWrite(op05, HIGH);   // 1
    digitalWrite(op06, HIGH);   // 1
    digitalWrite(op07, HIGH);   // 1
    digitalWrite(op08, HIGH);   // 1
  }
  ssp08val = digitalRead(ssp08);
  if(ssp08val == LOW)           // 11110111 (Message1 00008.mp3)
  {
    digitalWrite(op01, HIGH);   // 1 
    digitalWrite(op02, HIGH);   // 1
    digitalWrite(op03, HIGH);   // 1
    digitalWrite(op04, LOW);    // 0
    digitalWrite(op05, HIGH);   // 1
    digitalWrite(op06, HIGH);   // 1
    digitalWrite(op07, HIGH);   // 1
    digitalWrite(op08, HIGH);   // 1
  }
  ssp09val = digitalRead(ssp09);
  if(ssp09val == LOW)           // 11110110 (Message1 00009.mp3)
  {
    digitalWrite(op01, LOW);    // 0 
    digitalWrite(op02, HIGH);   // 1
    digitalWrite(op03, HIGH);   // 1
    digitalWrite(op04, LOW);    // 0
    digitalWrite(op05, HIGH);   // 1
    digitalWrite(op06, HIGH);   // 1
    digitalWrite(op07, HIGH);   // 1
    digitalWrite(op08, HIGH);   // 1
  }
  ssp10val = digitalRead(ssp10);
  if(ssp10val == LOW)           // 11110101 (Message1 00010.mp3)
  {
    digitalWrite(op01, HIGH);   // 1 
    digitalWrite(op02, LOW);    // 0
    digitalWrite(op03, HIGH);   // 1
    digitalWrite(op04, LOW);    // 0
    digitalWrite(op05, HIGH);   // 1
    digitalWrite(op06, HIGH);   // 1
    digitalWrite(op07, HIGH);   // 1
    digitalWrite(op08, HIGH);   // 1
  }
  ssp11val = digitalRead(ssp11);
  if(ssp11val == LOW)           // 11110100 (Message1 00011.mp3)
  {
    digitalWrite(op01, LOW);    // 0 
    digitalWrite(op02, LOW);    // 0
    digitalWrite(op03, HIGH);   // 1
    digitalWrite(op04, LOW);    // 0
    digitalWrite(op05, HIGH);   // 1
    digitalWrite(op06, HIGH);   // 1
    digitalWrite(op07, HIGH);   // 1
    digitalWrite(op08, HIGH);   // 1
  }
  ssp12val = digitalRead(ssp12);
  if(ssp12val == LOW)           // 11110011 (Message1 00012.mp3)
  {
    digitalWrite(op01, HIGH);   // 1 
    digitalWrite(op02, HIGH);   // 1
    digitalWrite(op03, LOW);    // 0
    digitalWrite(op04, LOW);    // 0
    digitalWrite(op05, HIGH);   // 1
    digitalWrite(op06, HIGH);   // 1
    digitalWrite(op07, HIGH);   // 1
    digitalWrite(op08, HIGH);   // 1
  }
   
   LED33val = digitalRead(LED33);  // Read the state of the LED Busy value
  
   if(LED33val == LOW)             // Busy LED pin 33 INPUT (LOW = Playing)
  {
   digitalWrite(op09, HIGH);       // Busy LED pin 13 OUTPUT (LED = On)
  }
   else if(LED33val == HIGH)       // Busy LED pin 33 INPUT (HIGH = Stopped)
  {
   digitalWrite(op09, LOW);        // Busy LED pin 13 OUTPUT (LED = Off)
  }
}

  • Nice score. Nothing like solid and authentic hardware to give a project great cachet. 

  • in reply to shabaz

    You put all your effort into putting everything together with arrays and loops and then the compiler comes along and makes you a loop unrolling. I'm just kidding, I'm also an advocate of readable and maintainable code.

  • in reply to shabaz

    I did not use arrays in that particular setting but I use arrays in other projects. This was just quick and dirty to put together to make it work, although I do like what you have posted with the alternative code thank you very much.

  • Very interesting project, it's a great idea.

    I had to comment, not to detract from the project or the current code, but just as a suggestion, that the code can be significantly reduced (to less than a third), by using arrays.

    That's often worth doing, because that means there is a lot less to debug, and can be quickly adjusted if (say) there were more or less selector switches and so on.

    I've had a go at doing it, I have not tested since I don't have your setup. It is definitely worth looking through though, because you'll see the differences compared to your code which you already know, and the comparison can often be a simple way to quickly pick up on programming methods/styles (not saying mine is perfect, it isn't). I would have done a few more things differently, a few things are redundant but I kept it all in a near-identical way so that it is easy for you to see the differences.

    // ****************************************************
// ************* Battleship Phone *********************
// ****************************************************

// ******************* defines ************************
#define NUM_INPUTS 13
#define NUM_OUTPUTS 9
#define BUSY_IN_PIN 33
#define LED_OUT_PIN 13

// ****************** GPIO pins *********************
// Input pins (selector switches and Busy input)
const int input_pin[NUM_INPUTS] = {21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, BUSY_IN_PIN};
int input_value[NUM_INPUTS] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
// Output pins (MP3 select pins, and output LED)
const int output_pin[NUM_OUTPUTS] = {2, 3, 4, 5, 6, 7, 8, 9, LED_OUT_PIN};
int output_value[NUM_OUTPUTS];

// **************** setup function ******************
void setup()
{
  int i;
  Serial.begin(9600);
  // set the pin modes for all inputs and outputs accordingly
  for (i=0; i<NUM_INPUTS; i++) {
    pinMode(input_pin[i], INPUT_PULLUP);
  }
  for (i=0; i<NUM_OUTPUTS; i++) {
    pinMode(output_pin[i], OUTPUT);
  }
}

// *************** mp3_select ***********************
// mp3_select is used to set eight output pins
// example: mp3_select(3) will set the pins to the inverse of 
// binary 3 (0000 0011) i.e. 1111 1100. 
void mp3_select(char track) {
    for (int i = 0; i < 8; i++) { 
        if (track & (1 << i)) {
            // set the pin to low
            digitalWrite(output_pin[i], LOW);
        } else {
            // set the pin to high
            digitalWrite(output_pin[i], HIGH);
        }
    }
}

// *************** loop function *********************
void loop() {
  int i;
  char text[16];
  char busy_status;

  // read all the output pins (not sure why, just to print status?)
  for (i=0; i<NUM_OUTPUTS; i++) {
    output_value[i] = digitalRead(output_pin[i]);
  }
  for (i=0; i<NUM_OUTPUTS; i++) {
    sprintf(text, "op%d: %d ", i+1, output_value[i]);
    Serial.print(text);
  }
  
  // read all the selector switch inputs, and play the relevant MP3 file
  for (i=0; i<NUM_INPUTS-1; i++) {
    input_value[i] = digitalRead(input_pin[i]);
    if (input_value[i] == LOW) {
      mp3_select(i+1);
      // should handle debounce here if desired.
      // also, should have a break statement here, but I kept the original logic
    }
  }

  // update the LED to indicate the playout status
  busy_status = digitalRead(BUSY_IN_PIN);
  if (busy_status==LOW) { // playing
    digitalWrite(LED_OUT_PIN, HIGH);
  } else { // stopped
    digitalWrite(LED_OUT_PIN, LOW);
  }
  
}