Arduino Train for Kids 2

Redesign of a cheap set of a kid's railway into an intelligent train with control from the Android device. Project updated. Added sensor.

Apr 3, 2018

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train

toys

kids

Components and supplies

Generic Arduino IR-sensor module

L9110s motor-driver

Arduino Nano R3

HC-06 Bluetooth Module

Apps and platforms

Arduino IDE

Arduino Train for Kids 2

Project description

Code

Sketch for Loco

arduino

1#define SENSOR_IR 2
2#define L9110S_AIA 3
3#define L9110S_AIB 5
4#define  GND1 8
5#define LED1 9
6#define LED2 10
7#define FLOODLIGHT 11
8#define  GND2 12
9
10static unsigned long preMillis;
11String inputString = "";
12boolean  stringComplete = false;
13int locoSpeed, counter = 0;
14bool tick, directionForward,  directionBackward;
15bool sensorActive = false, alarm_allRed = false;
16
17
18void  setup() {
19  // Initialize serial
20  Serial.begin(9600);
21  inputString.reserve(4);
22
23  // Pins
24  pinMode(GND1, OUTPUT);
25  pinMode(GND2, OUTPUT);
26  pinMode(LED1,  OUTPUT);
27  pinMode(LED2, OUTPUT);
28  pinMode(FLOODLIGHT, OUTPUT);
29  pinMode(L9110S_AIA,  OUTPUT);
30  pinMode(L9110S_AIB, OUTPUT);
31  pinMode(SENSOR_IR, INPUT);
32
33  digitalWrite(GND1, LOW);
34  digitalWrite(GND2, LOW);
35  digitalWrite(FLOODLIGHT,  HIGH);
36  delay(300);
37  digitalWrite(FLOODLIGHT, LOW);
38}
39
40void loop()  {
41
42  if (stringComplete) {
43
44    // TRAIN CONTROL
45    if (inputString.charAt(0)  =='a') {
46
47      // TROTTLE
48      if (inputString.charAt(1) =='0') {
49        if (inputString.charAt(2) =='0') locoSpeed = 0; // Stop
50        if (inputString.charAt(2)  =='2') locoSpeed = 80;
51        if (inputString.charAt(2) =='4') locoSpeed = 110;
52        if (inputString.charAt(2) =='6') locoSpeed = 140;
53        if (inputString.charAt(2)  =='8') locoSpeed = 170;
54      }
55      if (inputString.charAt(1) =='1') locoSpeed  = 200;
56
57      // MOVE DIRECTION
58      if (inputString.charAt(1) =='d')  {
59        if (inputString.charAt(2) =='f') {
60          directionForward =  true;
61          directionBackward = false;
62        }
63        if (inputString.charAt(2)  =='b') {
64          directionForward = false;
65          directionBackward =  true;
66        }
67        if (inputString.charAt(2) =='s') {
68          locoSpeed  = 0;
69          directionForward = false;
70          directionBackward = false;
71          // DC motor conflict prevention
72          digitalWrite(L9110S_AIA,  LOW);
73          digitalWrite(L9110S_AIB, LOW);
74          delay(400);
75        }
76      }        
77    }
78
79    // LIGHT
80    if (inputString.charAt(0) =='l')  {
81    	if (inputString.charAt(2) =='0') digitalWrite(FLOODLIGHT, LOW);
82      if  (inputString.charAt(2) =='1') digitalWrite(FLOODLIGHT, HIGH);
83    }
84
85    //  SENSOR ON/OFF
86    if (inputString.charAt(0) =='s') {
87      if (inputString.charAt(2)  =='0') sensorActive = false;
88      if (inputString.charAt(2) =='1') sensorActive  = true;
89    }
90
91    inputString = "";
92    stringComplete = false;
93  }
94
95  if (digitalRead(SENSOR_IR) == HIGH || !sensorActive) {
96
97    if  (directionBackward) {
98      digitalWrite(L9110S_AIB, LOW);    	
99      analogWrite(L9110S_AIA,  locoSpeed);
100    }
101    if (directionForward) {
102      digitalWrite(L9110S_AIA,  LOW);
103      analogWrite(L9110S_AIB, locoSpeed);
104    }
105    alarm_allRed  = false;
106
107  }
108  else { // STOP at IR sensor
109
110    digitalWrite(L9110S_AIA,  LOW);
111    digitalWrite(L9110S_AIB, LOW);
112    Serial.println("alarmz");
113    alarm_allRed = true;
114  }
115
116  if (locoSpeed > 0 && !alarm_allRed) {
117    static unsigned long blinkMillis;
118    if (millis() > (blinkMillis + 300))  {
119      tick = !tick;
120      blinkMillis = millis();
121    }
122    digitalWrite(LED1,  tick);
123    digitalWrite(LED2, !tick);
124  }
125  else if (alarm_allRed) {
126    digitalWrite(LED1, HIGH);
127    digitalWrite(LED2, HIGH);
128  }
129  else  {
130    digitalWrite(LED1, LOW);
131    digitalWrite(LED2, LOW);
132  }
133}
134
135//  FUNCTIONS
136void serialEvent() {
137  while (Serial.available()) {
138    char  inChar = (char)Serial.read();
139    inputString += inChar;
140    if (inChar ==  'z') {
141    stringComplete = true;
142    }
143  }
144}

#define SENSOR_IR 2
#define L9110S_AIA 3
#define L9110S_AIB 5
#define  GND1 8
#define LED1 9
#define LED2 10
#define FLOODLIGHT 11
#define  GND2 12

static unsigned long preMillis;
String inputString = "";
boolean  stringComplete = false;
int locoSpeed, counter = 0;
bool tick, directionForward,  directionBackward;
bool sensorActive = false, alarm_allRed = false;


void  setup() {
  // Initialize serial
  Serial.begin(9600);
  inputString.reserve(4);

  // Pins
  pinMode(GND1, OUTPUT);
  pinMode(GND2, OUTPUT);
  pinMode(LED1,  OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(FLOODLIGHT, OUTPUT);
  pinMode(L9110S_AIA,  OUTPUT);
  pinMode(L9110S_AIB, OUTPUT);
  pinMode(SENSOR_IR, INPUT);

  digitalWrite(GND1, LOW);
  digitalWrite(GND2, LOW);
  digitalWrite(FLOODLIGHT,  HIGH);
  delay(300);
  digitalWrite(FLOODLIGHT, LOW);
}

void loop()  {

  if (stringComplete) {

    // TRAIN CONTROL
    if (inputString.charAt(0)  =='a') {

      // TROTTLE
      if (inputString.charAt(1) =='0') {
        if (inputString.charAt(2) =='0') locoSpeed = 0; // Stop
        if (inputString.charAt(2)  =='2') locoSpeed = 80;
        if (inputString.charAt(2) =='4') locoSpeed = 110;
        if (inputString.charAt(2) =='6') locoSpeed = 140;
        if (inputString.charAt(2)  =='8') locoSpeed = 170;
      }
      if (inputString.charAt(1) =='1') locoSpeed  = 200;

      // MOVE DIRECTION
      if (inputString.charAt(1) =='d')  {
        if (inputString.charAt(2) =='f') {
          directionForward =  true;
          directionBackward = false;
        }
        if (inputString.charAt(2)  =='b') {
          directionForward = false;
          directionBackward =  true;
        }
        if (inputString.charAt(2) =='s') {
          locoSpeed  = 0;
          directionForward = false;
          directionBackward = false;
          // DC motor conflict prevention
          digitalWrite(L9110S_AIA,  LOW);
          digitalWrite(L9110S_AIB, LOW);
          delay(400);
        }
      }        
    }

    // LIGHT
    if (inputString.charAt(0) =='l')  {
    	if (inputString.charAt(2) =='0') digitalWrite(FLOODLIGHT, LOW);
      if  (inputString.charAt(2) =='1') digitalWrite(FLOODLIGHT, HIGH);
    }

    //  SENSOR ON/OFF
    if (inputString.charAt(0) =='s') {
      if (inputString.charAt(2)  =='0') sensorActive = false;
      if (inputString.charAt(2) =='1') sensorActive  = true;
    }

    inputString = "";
    stringComplete = false;
  }

  if (digitalRead(SENSOR_IR) == HIGH || !sensorActive) {

    if  (directionBackward) {
      digitalWrite(L9110S_AIB, LOW);    	
      analogWrite(L9110S_AIA,  locoSpeed);
    }
    if (directionForward) {
      digitalWrite(L9110S_AIA,  LOW);
      analogWrite(L9110S_AIB, locoSpeed);
    }
    alarm_allRed  = false;

  }
  else { // STOP at IR sensor

    digitalWrite(L9110S_AIA,  LOW);
    digitalWrite(L9110S_AIB, LOW);
    Serial.println("alarmz");
    alarm_allRed = true;
  }

  if (locoSpeed > 0 && !alarm_allRed) {
    static unsigned long blinkMillis;
    if (millis() > (blinkMillis + 300))  {
      tick = !tick;
      blinkMillis = millis();
    }
    digitalWrite(LED1,  tick);
    digitalWrite(LED2, !tick);
  }
  else if (alarm_allRed) {
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
  }
  else  {
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
  }
}

//  FUNCTIONS
void serialEvent() {
  while (Serial.available()) {
    char  inChar = (char)Serial.read();
    inputString += inChar;
    if (inChar ==  'z') {
    stringComplete = true;
    }
  }
}

Sketch for Loco

arduino

1#define SENSOR_IR 2
2#define L9110S_AIA 3
3#define L9110S_AIB 5
4#define   GND1 8
5#define LED1 9
6#define LED2 10
7#define FLOODLIGHT 11
8#define   GND2 12
9
10static unsigned long preMillis;
11String inputString = "";
12boolean   stringComplete = false;
13int locoSpeed, counter = 0;
14bool tick, directionForward,   directionBackward;
15bool sensorActive = false, alarm_allRed = false;
16
17
18void   setup() {
19  // Initialize serial
20  Serial.begin(9600);
21  inputString.reserve(4);
22
23   // Pins
24  pinMode(GND1, OUTPUT);
25  pinMode(GND2, OUTPUT);
26  pinMode(LED1,   OUTPUT);
27  pinMode(LED2, OUTPUT);
28  pinMode(FLOODLIGHT, OUTPUT);
29  pinMode(L9110S_AIA,   OUTPUT);
30  pinMode(L9110S_AIB, OUTPUT);
31  pinMode(SENSOR_IR, INPUT);
32
33   digitalWrite(GND1, LOW);
34  digitalWrite(GND2, LOW);
35  digitalWrite(FLOODLIGHT,   HIGH);
36  delay(300);
37  digitalWrite(FLOODLIGHT, LOW);
38}
39
40void loop()   {
41
42  if (stringComplete) {
43
44    // TRAIN CONTROL
45    if (inputString.charAt(0)   =='a') {
46
47      // TROTTLE
48      if (inputString.charAt(1) =='0') {
49         if (inputString.charAt(2) =='0') locoSpeed = 0; // Stop
50        if (inputString.charAt(2)   =='2') locoSpeed = 80;
51        if (inputString.charAt(2) =='4') locoSpeed = 110;
52         if (inputString.charAt(2) =='6') locoSpeed = 140;
53        if (inputString.charAt(2)   =='8') locoSpeed = 170;
54      }
55      if (inputString.charAt(1) =='1') locoSpeed   = 200;
56
57      // MOVE DIRECTION
58      if (inputString.charAt(1) =='d')   {
59        if (inputString.charAt(2) =='f') {
60          directionForward =   true;
61          directionBackward = false;
62        }
63        if (inputString.charAt(2)   =='b') {
64          directionForward = false;
65          directionBackward =   true;
66        }
67        if (inputString.charAt(2) =='s') {
68          locoSpeed   = 0;
69          directionForward = false;
70          directionBackward = false;
71           // DC motor conflict prevention
72          digitalWrite(L9110S_AIA,   LOW);
73          digitalWrite(L9110S_AIB, LOW);
74          delay(400);
75        }
76       }        
77    }
78
79    // LIGHT
80    if (inputString.charAt(0) =='l')   {
81    	if (inputString.charAt(2) =='0') digitalWrite(FLOODLIGHT, LOW);
82      if   (inputString.charAt(2) =='1') digitalWrite(FLOODLIGHT, HIGH);
83    }
84
85    //   SENSOR ON/OFF
86    if (inputString.charAt(0) =='s') {
87      if (inputString.charAt(2)   =='0') sensorActive = false;
88      if (inputString.charAt(2) =='1') sensorActive   = true;
89    }
90
91    inputString = "";
92    stringComplete = false;
93   }
94
95  if (digitalRead(SENSOR_IR) == HIGH || !sensorActive) {
96
97    if   (directionBackward) {
98      digitalWrite(L9110S_AIB, LOW);    	
99      analogWrite(L9110S_AIA,   locoSpeed);
100    }
101    if (directionForward) {
102      digitalWrite(L9110S_AIA,   LOW);
103      analogWrite(L9110S_AIB, locoSpeed);
104    }
105    alarm_allRed   = false;
106
107  }
108  else { // STOP at IR sensor
109
110    digitalWrite(L9110S_AIA,   LOW);
111    digitalWrite(L9110S_AIB, LOW);
112    Serial.println("alarmz");
113     alarm_allRed = true;
114  }
115
116  if (locoSpeed > 0 && !alarm_allRed) {
117     static unsigned long blinkMillis;
118    if (millis() > (blinkMillis + 300))   {
119      tick = !tick;
120      blinkMillis = millis();
121    }
122    digitalWrite(LED1,   tick);
123    digitalWrite(LED2, !tick);
124  }
125  else if (alarm_allRed) {
126     digitalWrite(LED1, HIGH);
127    digitalWrite(LED2, HIGH);
128  }
129  else   {
130    digitalWrite(LED1, LOW);
131    digitalWrite(LED2, LOW);
132  }
133}
134
135//   FUNCTIONS
136void serialEvent() {
137  while (Serial.available()) {
138    char   inChar = (char)Serial.read();
139    inputString += inChar;
140    if (inChar ==   'z') {
141    stringComplete = true;
142    }
143  }
144}

#define SENSOR_IR 2
#define L9110S_AIA 3
#define L9110S_AIB 5
#define   GND1 8
#define LED1 9
#define LED2 10
#define FLOODLIGHT 11
#define   GND2 12

static unsigned long preMillis;
String inputString = "";
boolean   stringComplete = false;
int locoSpeed, counter = 0;
bool tick, directionForward,   directionBackward;
bool sensorActive = false, alarm_allRed = false;


void   setup() {
  // Initialize serial
  Serial.begin(9600);
  inputString.reserve(4);

   // Pins
  pinMode(GND1, OUTPUT);
  pinMode(GND2, OUTPUT);
  pinMode(LED1,   OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(FLOODLIGHT, OUTPUT);
  pinMode(L9110S_AIA,   OUTPUT);
  pinMode(L9110S_AIB, OUTPUT);
  pinMode(SENSOR_IR, INPUT);

   digitalWrite(GND1, LOW);
  digitalWrite(GND2, LOW);
  digitalWrite(FLOODLIGHT,   HIGH);
  delay(300);
  digitalWrite(FLOODLIGHT, LOW);
}

void loop()   {

  if (stringComplete) {

    // TRAIN CONTROL
    if (inputString.charAt(0)   =='a') {

      // TROTTLE
      if (inputString.charAt(1) =='0') {
         if (inputString.charAt(2) =='0') locoSpeed = 0; // Stop
        if (inputString.charAt(2)   =='2') locoSpeed = 80;
        if (inputString.charAt(2) =='4') locoSpeed = 110;
         if (inputString.charAt(2) =='6') locoSpeed = 140;
        if (inputString.charAt(2)   =='8') locoSpeed = 170;
      }
      if (inputString.charAt(1) =='1') locoSpeed   = 200;

      // MOVE DIRECTION
      if (inputString.charAt(1) =='d')   {
        if (inputString.charAt(2) =='f') {
          directionForward =   true;
          directionBackward = false;
        }
        if (inputString.charAt(2)   =='b') {
          directionForward = false;
          directionBackward =   true;
        }
        if (inputString.charAt(2) =='s') {
          locoSpeed   = 0;
          directionForward = false;
          directionBackward = false;
           // DC motor conflict prevention
          digitalWrite(L9110S_AIA,   LOW);
          digitalWrite(L9110S_AIB, LOW);
          delay(400);
        }
       }        
    }

    // LIGHT
    if (inputString.charAt(0) =='l')   {
    	if (inputString.charAt(2) =='0') digitalWrite(FLOODLIGHT, LOW);
      if   (inputString.charAt(2) =='1') digitalWrite(FLOODLIGHT, HIGH);
    }

    //   SENSOR ON/OFF
    if (inputString.charAt(0) =='s') {
      if (inputString.charAt(2)   =='0') sensorActive = false;
      if (inputString.charAt(2) =='1') sensorActive   = true;
    }

    inputString = "";
    stringComplete = false;
   }

  if (digitalRead(SENSOR_IR) == HIGH || !sensorActive) {

    if   (directionBackward) {
      digitalWrite(L9110S_AIB, LOW);    	
      analogWrite(L9110S_AIA,   locoSpeed);
    }
    if (directionForward) {
      digitalWrite(L9110S_AIA,   LOW);
      analogWrite(L9110S_AIB, locoSpeed);
    }
    alarm_allRed   = false;

  }
  else { // STOP at IR sensor

    digitalWrite(L9110S_AIA,   LOW);
    digitalWrite(L9110S_AIB, LOW);
    Serial.println("alarmz");
     alarm_allRed = true;
  }

  if (locoSpeed > 0 && !alarm_allRed) {
     static unsigned long blinkMillis;
    if (millis() > (blinkMillis + 300))   {
      tick = !tick;
      blinkMillis = millis();
    }
    digitalWrite(LED1,   tick);
    digitalWrite(LED2, !tick);
  }
  else if (alarm_allRed) {
     digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
  }
  else   {
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
  }
}

//   FUNCTIONS
void serialEvent() {
  while (Serial.available()) {
    char   inChar = (char)Serial.read();
    inputString += inChar;
    if (inChar ==   'z') {
    stringComplete = true;
    }
  }
}

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Electric scheme

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