Model Railroad Grade Crossing Controller

Arduino and easy to use photo occupancy sensors simplify control of the grade crossing signals and sound effects on a model railroad.

Jul 20, 2018

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model railroad

subroutines

Components and supplies

RAM Track 111 or 117 Dual Optical Detector PCB

Sound Replay PCB

DFRobot 4 Relay Shield

Arduino UNO

LED Flasher PCB

9 volt Power Supply

Screw Terminal Shield

Project description

Code

Capreol Museum Rail / Road Crossing Controller

arduino

1// set pin numbers:
2const int buttonAPin = A1;     // the number of   the pushbutton pins
3const int buttonBPin = A2;
4 
5const int ledPin =  13;       // the number of the LED pin
6const int RelayA = 2;     // the number of   the relay coil drive pin
7const int RelayB = 3;
8const int RelayC = 11;
9   
10// Define Variables
11int buttonAState = HIGH;
12int lastButtonAState = HIGH;
13
14int   RUNNING  = LOW;
15int OCCUPIED = LOW;
16
17int buttonBState=HIGH;
18int lastButtonBState   = HIGH;
19
20
21// the following variables are long's because the time, measured   in miliseconds,
22// will quickly become a bigger number than can be stored in   an int.
23
24unsigned long lastDebounceTimeA = 0;
25unsigned long lastDebounceTimeB   = 0;
26
27unsigned long debounceDelay = 50;
28unsigned long loopdelayA = 500;
29unsigned   long looptriggerA;
30unsigned long loopdelayB = 500;
31unsigned long looptriggerB;
32unsigned   long RUNNINGtime = 3000;
33unsigned long RUNNINGtrigger;
34
35#include <LiquidCrystal.h>
36
37//   Select the pin used on LCD
38LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
39
40void setup()   { 
41
42  lcd.begin(16, 2);
43  lcd.setCursor(0, 0);
44  lcd.print("KEVino   2017");
45  lcd.setCursor(0, 1);
46  lcd.print("RAILCROSS");
47  delay(1000);
48   // scroll 16 positions (string length) to the left
49  // to move it offscreen   left:
50  for (int positionCounter = 0; positionCounter < 16; positionCounter++)   {
51    // scroll one position left:
52    lcd.scrollDisplayRight();
53    //   wait a bit:
54    delay(30);
55  }
56  {
57    lcd.begin(16, 2);
58    lcd.setCursor(0,   0);
59    lcd.print("Railcross");
60  }  
61  Serial.begin(9600);
62 
63   pinMode(ledPin, OUTPUT);
64  pinMode(RelayA, OUTPUT);
65  pinMode(buttonAPin,   INPUT_PULLUP);
66  pinMode(RelayB, OUTPUT);
67  pinMode(buttonBPin, INPUT_PULLUP);
68   pinMode(RelayC, OUTPUT);
69 
70}
71
72void debounceA()                         
73{
74   int readingA = digitalRead(buttonAPin);
75
76  if (readingA != lastButtonAState)
77   {
78    lastDebounceTimeA = millis();
79    looptriggerA = millis();
80  }
81   if ((millis() - lastDebounceTimeA) > debounceDelay)
82  {
83    if (readingA   != buttonAState)
84    {
85      buttonAState = readingA;
86    }
87  }
88   lastButtonAState = readingA;
89  lastDebounceTimeA = 0;
90  return;
91}
92
93void   debounceB()                        // Debounce A2 input
94{
95  int readingB =   digitalRead(buttonBPin);
96
97  if (readingB != lastButtonBState)
98  {
99    lastDebounceTimeB   = millis();
100    looptriggerB = millis();
101  }
102  if ((millis() - lastDebounceTimeB)   > debounceDelay)
103  {
104    if (readingB != buttonBState)
105    {
106      buttonBState   = readingB;
107    }
108  }
109  lastButtonBState = readingB;
110  lastDebounceTimeB   = 0;
111  return;
112}
113
114void START()                      // 1/2 second pulse   on Relay A,
115{                                 // RUNNING set HIGH,, Relay C set.
116   RUNNINGtrigger = millis();
117  digitalWrite(RelayA, HIGH);
118  digitalWrite(RelayC,   HIGH);
119  delay (500);
120  digitalWrite(RelayA, LOW);
121  RUNNING = HIGH;
122}
123void   STOP()                       // 1/2 second pulse on Relay B,
124{                                 //   RUNNING set LOW,, Relay C cleared.
125  RUNNINGtrigger = millis();
126  digitalWrite(RelayB,   HIGH);
127  digitalWrite(RelayC, LOW);
128  delay (500);
129  digitalWrite(RelayB,   LOW);
130  RUNNING = LOW;
131
132}
133
134void loop()
135{
136  lcd.setCursor(13,   0);                            // Display seconds elapsed
137  lcd.print(millis()   / 1000);
138 
139   
140  debounceA();                                     //Debounce   the sensor inputs
141  debounceB();                
142  digitalWrite(ledPin, OCCUPIED);                   // Use LED to indicate OCCUPIED
143  
144  if (buttonAState ==   LOW || buttonBState == LOW) 
145  {
146    OCCUPIED = HIGH;
147    RUNNINGtrigger   = millis();     
148    Serial.write("OCCUPIED");
149    Serial.println();
150      lcd.setCursor(0, 1);
151     lcd.print("Occupied");  
152  }
153  else
154   {
155    OCCUPIED = LOW;
156    lcd.setCursor(0, 1);
157    lcd.print("        ");   
158  }
159
160  if (OCCUPIED == HIGH && RUNNING == LOW)
161  {
162    START();
163     Serial.write("START");
164    Serial.println();
165      lcd.setCursor(8,   1);
166      lcd.print("RUNNING"); 
167  }
168
169  if (RUNNING == HIGH)
170    if   ((millis() - RUNNINGtrigger) > RUNNINGtime)
171    {
172      STOP();
173      Serial.write("STOP");
174       Serial.println(); 
175      lcd.setCursor(8, 1);
176      lcd.print("       ");   
177    }
178
179}
180
181
182
183
184
185
186

// set pin numbers:
const int buttonAPin = A1;     // the number of   the pushbutton pins
const int buttonBPin = A2;
 
const int ledPin =  13;       // the number of the LED pin
const int RelayA = 2;     // the number of   the relay coil drive pin
const int RelayB = 3;
const int RelayC = 11;
   
// Define Variables
int buttonAState = HIGH;
int lastButtonAState = HIGH;

int   RUNNING  = LOW;
int OCCUPIED = LOW;

int buttonBState=HIGH;
int lastButtonBState   = HIGH;


// the following variables are long's because the time, measured   in miliseconds,
// will quickly become a bigger number than can be stored in   an int.

unsigned long lastDebounceTimeA = 0;
unsigned long lastDebounceTimeB   = 0;

unsigned long debounceDelay = 50;
unsigned long loopdelayA = 500;
unsigned   long looptriggerA;
unsigned long loopdelayB = 500;
unsigned long looptriggerB;
unsigned   long RUNNINGtime = 3000;
unsigned long RUNNINGtrigger;

#include <LiquidCrystal.h>

//   Select the pin used on LCD
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

void setup()   { 

  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("KEVino   2017");
  lcd.setCursor(0, 1);
  lcd.print("RAILCROSS");
  delay(1000);
   // scroll 16 positions (string length) to the left
  // to move it offscreen   left:
  for (int positionCounter = 0; positionCounter < 16; positionCounter++)   {
    // scroll one position left:
    lcd.scrollDisplayRight();
    //   wait a bit:
    delay(30);
  }
  {
    lcd.begin(16, 2);
    lcd.setCursor(0,   0);
    lcd.print("Railcross");
  }  
  Serial.begin(9600);
 
   pinMode(ledPin, OUTPUT);
  pinMode(RelayA, OUTPUT);
  pinMode(buttonAPin,   INPUT_PULLUP);
  pinMode(RelayB, OUTPUT);
  pinMode(buttonBPin, INPUT_PULLUP);
   pinMode(RelayC, OUTPUT);
 
}

void debounceA()                         
{
   int readingA = digitalRead(buttonAPin);

  if (readingA != lastButtonAState)
   {
    lastDebounceTimeA = millis();
    looptriggerA = millis();
  }
   if ((millis() - lastDebounceTimeA) > debounceDelay)
  {
    if (readingA   != buttonAState)
    {
      buttonAState = readingA;
    }
  }
   lastButtonAState = readingA;
  lastDebounceTimeA = 0;
  return;
}

void   debounceB()                        // Debounce A2 input
{
  int readingB =   digitalRead(buttonBPin);

  if (readingB != lastButtonBState)
  {
    lastDebounceTimeB   = millis();
    looptriggerB = millis();
  }
  if ((millis() - lastDebounceTimeB)   > debounceDelay)
  {
    if (readingB != buttonBState)
    {
      buttonBState   = readingB;
    }
  }
  lastButtonBState = readingB;
  lastDebounceTimeB   = 0;
  return;
}

void START()                      // 1/2 second pulse   on Relay A,
{                                 // RUNNING set HIGH,, Relay C set.
   RUNNINGtrigger = millis();
  digitalWrite(RelayA, HIGH);
  digitalWrite(RelayC,   HIGH);
  delay (500);
  digitalWrite(RelayA, LOW);
  RUNNING = HIGH;
}
void   STOP()                       // 1/2 second pulse on Relay B,
{                                 //   RUNNING set LOW,, Relay C cleared.
  RUNNINGtrigger = millis();
  digitalWrite(RelayB,   HIGH);
  digitalWrite(RelayC, LOW);
  delay (500);
  digitalWrite(RelayB,   LOW);
  RUNNING = LOW;

}

void loop()
{
  lcd.setCursor(13,   0);                            // Display seconds elapsed
  lcd.print(millis()   / 1000);
 
   
  debounceA();                                     //Debounce   the sensor inputs
  debounceB();                
  digitalWrite(ledPin, OCCUPIED);                   // Use LED to indicate OCCUPIED
  
  if (buttonAState ==   LOW || buttonBState == LOW) 
  {
    OCCUPIED = HIGH;
    RUNNINGtrigger   = millis();     
    Serial.write("OCCUPIED");
    Serial.println();
      lcd.setCursor(0, 1);
     lcd.print("Occupied");  
  }
  else
   {
    OCCUPIED = LOW;
    lcd.setCursor(0, 1);
    lcd.print("        ");   
  }

  if (OCCUPIED == HIGH && RUNNING == LOW)
  {
    START();
     Serial.write("START");
    Serial.println();
      lcd.setCursor(8,   1);
      lcd.print("RUNNING"); 
  }

  if (RUNNING == HIGH)
    if   ((millis() - RUNNINGtrigger) > RUNNINGtime)
    {
      STOP();
      Serial.write("STOP");
       Serial.println(); 
      lcd.setCursor(8, 1);
      lcd.print("       ");   
    }

}

Capreol Museum Rail / Road Crossing Controller

arduino

1// set pin numbers:
2const int buttonAPin = A1;     // the number of  the pushbutton pins
3const int buttonBPin = A2;
4 
5const int ledPin =  13;      // the number of the LED pin
6const int RelayA = 2;     // the number of  the relay coil drive pin
7const int RelayB = 3;
8const int RelayC = 11;
9  
10// Define Variables
11int buttonAState = HIGH;
12int lastButtonAState = HIGH;
13
14int  RUNNING  = LOW;
15int OCCUPIED = LOW;
16
17int buttonBState=HIGH;
18int lastButtonBState  = HIGH;
19
20
21// the following variables are long's because the time, measured  in miliseconds,
22// will quickly become a bigger number than can be stored in  an int.
23
24unsigned long lastDebounceTimeA = 0;
25unsigned long lastDebounceTimeB  = 0;
26
27unsigned long debounceDelay = 50;
28unsigned long loopdelayA = 500;
29unsigned  long looptriggerA;
30unsigned long loopdelayB = 500;
31unsigned long looptriggerB;
32unsigned  long RUNNINGtime = 3000;
33unsigned long RUNNINGtrigger;
34
35#include <LiquidCrystal.h>
36
37//  Select the pin used on LCD
38LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
39
40void setup()  { 
41
42  lcd.begin(16, 2);
43  lcd.setCursor(0, 0);
44  lcd.print("KEVino  2017");
45  lcd.setCursor(0, 1);
46  lcd.print("RAILCROSS");
47  delay(1000);
48  // scroll 16 positions (string length) to the left
49  // to move it offscreen  left:
50  for (int positionCounter = 0; positionCounter < 16; positionCounter++)  {
51    // scroll one position left:
52    lcd.scrollDisplayRight();
53    //  wait a bit:
54    delay(30);
55  }
56  {
57    lcd.begin(16, 2);
58    lcd.setCursor(0,  0);
59    lcd.print("Railcross");
60  }  
61  Serial.begin(9600);
62 
63  pinMode(ledPin, OUTPUT);
64  pinMode(RelayA, OUTPUT);
65  pinMode(buttonAPin,  INPUT_PULLUP);
66  pinMode(RelayB, OUTPUT);
67  pinMode(buttonBPin, INPUT_PULLUP);
68  pinMode(RelayC, OUTPUT);
69 
70}
71
72void debounceA()                         
73{
74  int readingA = digitalRead(buttonAPin);
75
76  if (readingA != lastButtonAState)
77  {
78    lastDebounceTimeA = millis();
79    looptriggerA = millis();
80  }
81  if ((millis() - lastDebounceTimeA) > debounceDelay)
82  {
83    if (readingA  != buttonAState)
84    {
85      buttonAState = readingA;
86    }
87  }
88  lastButtonAState = readingA;
89  lastDebounceTimeA = 0;
90  return;
91}
92
93void  debounceB()                        // Debounce A2 input
94{
95  int readingB =  digitalRead(buttonBPin);
96
97  if (readingB != lastButtonBState)
98  {
99    lastDebounceTimeB  = millis();
100    looptriggerB = millis();
101  }
102  if ((millis() - lastDebounceTimeB)  > debounceDelay)
103  {
104    if (readingB != buttonBState)
105    {
106      buttonBState  = readingB;
107    }
108  }
109  lastButtonBState = readingB;
110  lastDebounceTimeB  = 0;
111  return;
112}
113
114void START()                      // 1/2 second pulse  on Relay A,
115{                                 // RUNNING set HIGH,, Relay C set.
116  RUNNINGtrigger = millis();
117  digitalWrite(RelayA, HIGH);
118  digitalWrite(RelayC,  HIGH);
119  delay (500);
120  digitalWrite(RelayA, LOW);
121  RUNNING = HIGH;
122}
123void  STOP()                       // 1/2 second pulse on Relay B,
124{                                 //  RUNNING set LOW,, Relay C cleared.
125  RUNNINGtrigger = millis();
126  digitalWrite(RelayB,  HIGH);
127  digitalWrite(RelayC, LOW);
128  delay (500);
129  digitalWrite(RelayB,  LOW);
130  RUNNING = LOW;
131
132}
133
134void loop()
135{
136  lcd.setCursor(13,  0);                            // Display seconds elapsed
137  lcd.print(millis()  / 1000);
138 
139   
140  debounceA();                                     //Debounce  the sensor inputs
141  debounceB();                
142  digitalWrite(ledPin, OCCUPIED);                  // Use LED to indicate OCCUPIED
143  
144  if (buttonAState ==  LOW || buttonBState == LOW) 
145  {
146    OCCUPIED = HIGH;
147    RUNNINGtrigger  = millis();     
148    Serial.write("OCCUPIED");
149    Serial.println();
150     lcd.setCursor(0, 1);
151     lcd.print("Occupied");  
152  }
153  else
154  {
155    OCCUPIED = LOW;
156    lcd.setCursor(0, 1);
157    lcd.print("        ");  
158  }
159
160  if (OCCUPIED == HIGH && RUNNING == LOW)
161  {
162    START();
163    Serial.write("START");
164    Serial.println();
165      lcd.setCursor(8,  1);
166      lcd.print("RUNNING"); 
167  }
168
169  if (RUNNING == HIGH)
170    if  ((millis() - RUNNINGtrigger) > RUNNINGtime)
171    {
172      STOP();
173      Serial.write("STOP");
174      Serial.println(); 
175      lcd.setCursor(8, 1);
176      lcd.print("       ");  
177    }
178
179}
180
181
182
183
184
185
186

// set pin numbers:
const int buttonAPin = A1;     // the number of  the pushbutton pins
const int buttonBPin = A2;
 
const int ledPin =  13;      // the number of the LED pin
const int RelayA = 2;     // the number of  the relay coil drive pin
const int RelayB = 3;
const int RelayC = 11;
  
// Define Variables
int buttonAState = HIGH;
int lastButtonAState = HIGH;

int  RUNNING  = LOW;
int OCCUPIED = LOW;

int buttonBState=HIGH;
int lastButtonBState  = HIGH;


// the following variables are long's because the time, measured  in miliseconds,
// will quickly become a bigger number than can be stored in  an int.

unsigned long lastDebounceTimeA = 0;
unsigned long lastDebounceTimeB  = 0;

unsigned long debounceDelay = 50;
unsigned long loopdelayA = 500;
unsigned  long looptriggerA;
unsigned long loopdelayB = 500;
unsigned long looptriggerB;
unsigned  long RUNNINGtime = 3000;
unsigned long RUNNINGtrigger;

#include <LiquidCrystal.h>

//  Select the pin used on LCD
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

void setup()  { 

  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("KEVino  2017");
  lcd.setCursor(0, 1);
  lcd.print("RAILCROSS");
  delay(1000);
  // scroll 16 positions (string length) to the left
  // to move it offscreen  left:
  for (int positionCounter = 0; positionCounter < 16; positionCounter++)  {
    // scroll one position left:
    lcd.scrollDisplayRight();
    //  wait a bit:
    delay(30);
  }
  {
    lcd.begin(16, 2);
    lcd.setCursor(0,  0);
    lcd.print("Railcross");
  }  
  Serial.begin(9600);
 
  pinMode(ledPin, OUTPUT);
  pinMode(RelayA, OUTPUT);
  pinMode(buttonAPin,  INPUT_PULLUP);
  pinMode(RelayB, OUTPUT);
  pinMode(buttonBPin, INPUT_PULLUP);
  pinMode(RelayC, OUTPUT);
 
}

void debounceA()                         
{
  int readingA = digitalRead(buttonAPin);

  if (readingA != lastButtonAState)
  {
    lastDebounceTimeA = millis();
    looptriggerA = millis();
  }
  if ((millis() - lastDebounceTimeA) > debounceDelay)
  {
    if (readingA  != buttonAState)
    {
      buttonAState = readingA;
    }
  }
  lastButtonAState = readingA;
  lastDebounceTimeA = 0;
  return;
}

void  debounceB()                        // Debounce A2 input
{
  int readingB =  digitalRead(buttonBPin);

  if (readingB != lastButtonBState)
  {
    lastDebounceTimeB  = millis();
    looptriggerB = millis();
  }
  if ((millis() - lastDebounceTimeB)  > debounceDelay)
  {
    if (readingB != buttonBState)
    {
      buttonBState  = readingB;
    }
  }
  lastButtonBState = readingB;
  lastDebounceTimeB  = 0;
  return;
}

void START()                      // 1/2 second pulse  on Relay A,
{                                 // RUNNING set HIGH,, Relay C set.
  RUNNINGtrigger = millis();
  digitalWrite(RelayA, HIGH);
  digitalWrite(RelayC,  HIGH);
  delay (500);
  digitalWrite(RelayA, LOW);
  RUNNING = HIGH;
}
void  STOP()                       // 1/2 second pulse on Relay B,
{                                 //  RUNNING set LOW,, Relay C cleared.
  RUNNINGtrigger = millis();
  digitalWrite(RelayB,  HIGH);
  digitalWrite(RelayC, LOW);
  delay (500);
  digitalWrite(RelayB,  LOW);
  RUNNING = LOW;

}

void loop()
{
  lcd.setCursor(13,  0);                            // Display seconds elapsed
  lcd.print(millis()  / 1000);
 
   
  debounceA();                                     //Debounce  the sensor inputs
  debounceB();                
  digitalWrite(ledPin, OCCUPIED);                  // Use LED to indicate OCCUPIED
  
  if (buttonAState ==  LOW || buttonBState == LOW) 
  {
    OCCUPIED = HIGH;
    RUNNINGtrigger  = millis();     
    Serial.write("OCCUPIED");
    Serial.println();
     lcd.setCursor(0, 1);
     lcd.print("Occupied");  
  }
  else
  {
    OCCUPIED = LOW;
    lcd.setCursor(0, 1);
    lcd.print("        ");  
  }

  if (OCCUPIED == HIGH && RUNNING == LOW)
  {
    START();
    Serial.write("START");
    Serial.println();
      lcd.setCursor(8,  1);
      lcd.print("RUNNING"); 
  }

  if (RUNNING == HIGH)
    if  ((millis() - RUNNINGtrigger) > RUNNINGtime)
    {
      STOP();
      Serial.write("STOP");
      Serial.println(); 
      lcd.setCursor(8, 1);
      lcd.print("       ");  
    }

}

Downloadable files

Model Railroad Grade-crossing Controller

Model Railroad Grade Crossing Controller

Model Railroad Grade-crossing Controller

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