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.
//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)
}
}
