Arduino Nano - Traffic Light

1/*
2 * This Arduino Nano code was developed by newbiely.com
3 *
4 * This Arduino Nano code is made available for public use without any restriction
5 *
6 * For comprehensive instructions and wiring diagrams, please visit:
7 * https://newbiely.com/tutorials/arduino-nano/arduino-nano-traffic-light
8 */
9
10#define PIN_RED    3 // The Arduino Nano pin connected to R pin of traffic light module
11#define PIN_YELLOW 4 // The Arduino Nano pin connected to Y pin of traffic light module
12#define PIN_GREEN  5 // The Arduino Nano pin connected to G pin of traffic light module
13
14#define RED_TIME     4000 // RED time in millisecond
15#define YELLOW_TIME  4000 // YELLOW time in millisecond
16#define GREEN_TIME   4000 // GREEN time in millisecond
17
18void setup() {
19  pinMode(PIN_RED, OUTPUT);
20  pinMode(PIN_YELLOW, OUTPUT);
21  pinMode(PIN_GREEN, OUTPUT);
22}
23
24// The loop function repeats indefinitely
25void loop() {
26  // red light on
27  digitalWrite(PIN_RED, HIGH);   // turn on
28  digitalWrite(PIN_YELLOW, LOW); // turn off
29  digitalWrite(PIN_GREEN, LOW);  // turn off
30  delay(RED_TIME); // keep red light on during a period of time
31
32  // yellow light on
33  digitalWrite(PIN_RED, LOW);    // turn off
34  digitalWrite(PIN_YELLOW, HIGH); // turn on
35  digitalWrite(PIN_GREEN, LOW); // turn off
36  delay(YELLOW_TIME); // keep yellow light on during a period of time
37
38  // green light on
39  digitalWrite(PIN_RED, LOW);    // turn off
40  digitalWrite(PIN_YELLOW, LOW); // turn off
41  digitalWrite(PIN_GREEN, HIGH); // turn on
42  delay(GREEN_TIME); // keep green light on during a period of time
43}

1/*
2 * This Arduino Nano code was developed by newbiely.com
3 *
4 * This Arduino Nano code is made available for public use without any restriction
5 *
6 * For comprehensive instructions and wiring diagrams, please visit:
7 * https://newbiely.com/tutorials/arduino-nano/arduino-nano-traffic-light
8 */
9
10#define PIN_RED    3 // The Arduino Nano pin connected to R pin of traffic light module
11#define PIN_YELLOW 4 // The Arduino Nano pin connected to Y pin of traffic light module
12#define PIN_GREEN  5 // The Arduino Nano pin connected to G pin of traffic light module
13
14#define RED_TIME     2000 // RED time in millisecond
15#define YELLOW_TIME  1000 // YELLOW time in millisecond
16#define GREEN_TIME   2000 // GREEN time in millisecond
17
18#define RED    0 // Index in array
19#define YELLOW 1 // Index in array
20#define GREEN  2 // Index in array
21
22const int pins[]  = {PIN_RED, PIN_YELLOW, PIN_GREEN};
23const int times[] = {RED_TIME, YELLOW_TIME, GREEN_TIME};
24
25void setup() {
26  pinMode(PIN_RED, OUTPUT);
27  pinMode(PIN_YELLOW, OUTPUT);
28  pinMode(PIN_GREEN, OUTPUT);
29}
30
31// The loop function repeats indefinitely
32void loop() {
33  for (int light = RED; light <= GREEN; light ++) {
34    trafic_light_on(light);
35    delay(times[light]); // keep light on during a period of time
36  }
37}
38
39void trafic_light_on(int light) {
40  for (int i = RED; i <= GREEN; i ++) {
41    if (i == light)
42      digitalWrite(pins[i], HIGH);   // turn on
43    else
44      digitalWrite(pins[i], LOW);   // turn off
45  }
46}

1/*
2 * This Arduino Nano code was developed by newbiely.com
3 *
4 * This Arduino Nano code is made available for public use without any restriction
5 *
6 * For comprehensive instructions and wiring diagrams, please visit:
7 * https://newbiely.com/tutorials/arduino-nano/arduino-nano-traffic-light
8 */
9
10#define PIN_RED    3 // The Arduino Nano pin connected to R pin of traffic light module
11#define PIN_YELLOW 4 // The Arduino Nano pin connected to Y pin of traffic light module
12#define PIN_GREEN  5 // The Arduino Nano pin connected to G pin of traffic light module
13
14#define RED_TIME 2000     // RED time in millisecond
15#define YELLOW_TIME 1000  // YELLOW time in millisecond
16#define GREEN_TIME 2000   // GREEN time in millisecond
17
18#define RED  0    // Index in array
19#define YELLOW 1  // Index in array
20#define GREEN  2  // Index in array
21
22const int pins[] = { PIN_RED, PIN_YELLOW, PIN_GREEN };
23const int times[] = { RED_TIME, YELLOW_TIME, GREEN_TIME };
24
25void setup() {
26  pinMode(PIN_RED, OUTPUT);
27  pinMode(PIN_YELLOW, OUTPUT);
28  pinMode(PIN_GREEN, OUTPUT);
29}
30
31// The loop function repeats indefinitely
32void loop() {
33  // red light on
34  trafic_light_on(RED);
35  delay(times[RED]);  // keep red light on during a period of time
36
37  // yellow light on
38  trafic_light_on(YELLOW);
39  delay(times[YELLOW]);  // keep yellow light on during a period of time
40
41  // green light on
42  trafic_light_on(GREEN);
43  delay(times[GREEN]);  // keep green light on during a period of time
44}
45
46void trafic_light_on(int light) {
47  for (int i = RED; i <= GREEN; i++) {
48    if (i == light)
49      digitalWrite(pins[i], HIGH);  // turn on
50    else
51      digitalWrite(pins[i], LOW);  // turn off
52  }
53}

1/*
2 * This Arduino Nano code was developed by newbiely.com
3 *
4 * This Arduino Nano code is made available for public use without any restriction
5 *
6 * For comprehensive instructions and wiring diagrams, please visit:
7 * https://newbiely.com/tutorials/arduino-nano/arduino-nano-traffic-light
8 */
9
10#define PIN_RED    3 // The Arduino Nano pin connected to R pin of traffic light module
11#define PIN_YELLOW 4 // The Arduino Nano pin connected to Y pin of traffic light module
12#define PIN_GREEN  5 // The Arduino Nano pin connected to G pin of traffic light module
13
14#define RED_TIME 2000     // RED time in millisecond
15#define YELLOW_TIME 1000  // YELLOW time in millisecond
16#define GREEN_TIME 2000   // GREEN time in millisecond
17
18#define RED    0  // Index in array
19#define YELLOW 1  // Index in array
20#define GREEN  2  // Index in array
21
22const int pins[] = { PIN_RED, PIN_YELLOW, PIN_GREEN };
23const int times[] = { RED_TIME, YELLOW_TIME, GREEN_TIME };
24unsigned long last_time = 0;
25int light = RED;  // start with RED light
26
27void setup() {
28  pinMode(PIN_RED, OUTPUT);
29  pinMode(PIN_YELLOW, OUTPUT);
30  pinMode(PIN_GREEN, OUTPUT);
31  trafic_light_on(light);
32  last_time = millis();
33}
34
35// The loop function repeats indefinitely
36void loop() {
37  if ((millis() - last_time) > times[light]) {
38    light++;
39    if (light >= 3)
40      light = RED;  // new circle
41
42    trafic_light_on(light);
43    last_time = millis();
44  }
45
46  // TO DO: your other code
47}
48
49void trafic_light_on(int light) {
50  for (int i = RED; i <= GREEN; i++) {
51    if (i == light)
52      digitalWrite(pins[i], HIGH);  // turn on
53    else
54      digitalWrite(pins[i], LOW);  // turn off
55  }
56}