LED Indicator for Your Robot / Machine

1const int LED_GREEN = 13;       //Giving Pin 13 the name of LED_GREEN
2const  int BTN_GO = 2;        //Giving Pin 2 the name of BTN_ON
3const int LED_RED =  12;       //Giving Pin 12 the name of LED_RED
4const int BTN_STOP = 4;      //Giving  Pin 4 the name of BTN_OFF
5const int BTN_RESET = 7;
6int btn_state1 = 0;       //Declaring  the Button State variable 
7int btn_state2 = 0;
8int btn_state3 =0;
9void  setup() {
10  // put your setup code here, to run once:
11  pinMode(LED_GREEN,  OUTPUT);      //Setting Pin 13 as an OUTPUT
12  pinMode(BTN_GO, INPUT);       //Setting  Pin 2 as an INPUT
13  pinMode(LED_RED, OUTPUT);       //Setting Pin 12 as an OUTPUT
14  pinMode(BTN_STOP, INPUT);
15  pinMode(BTN_RESET, INPUT);
16  digitalWrite(BTN_GO,  HIGH);
17  digitalWrite(BTN_STOP, HIGH);
18  digitalWrite(BTN_RESET, HIGH);
19}
20
21void  loop() {
22  // put your main code here, to run repeatedly:
23  btn_state1 = digitalRead(BTN_GO);
24  btn_state2 = digitalRead(BTN_STOP);
25  btn_state3 = digitalRead(BTN_RESET);
26  
27  //Once button has been pressed LED stays ON
28  if (btn_state1 == LOW)
29  {
30    digitalWrite(LED_GREEN, HIGH);
31    digitalWrite(LED_RED, LOW);
32  } 
33  if (btn_state2 == LOW){
34    digitalWrite(LED_GREEN, LOW);
35    digitalWrite(LED_RED,  HIGH);
36  }
37  if (btn_state3 == LOW)
38  {
39    digitalWrite(LED_GREEN,  LOW);
40    digitalWrite(LED_RED, LOW);
41  }
42}

1const int LED_GREEN = 13;       //Giving Pin 13 the name of LED_GREEN
2const
3  int BTN_GO = 2;        //Giving Pin 2 the name of BTN_ON
4const int LED_RED =
5  12;       //Giving Pin 12 the name of LED_RED
6const int BTN_STOP = 4;      //Giving
7  Pin 4 the name of BTN_OFF
8const int BTN_RESET = 7;
9int btn_state1 = 0;       //Declaring
10  the Button State variable 
11int btn_state2 = 0;
12int btn_state3 =0;
13void
14  setup() {
15  // put your setup code here, to run once:
16  pinMode(LED_GREEN,
17  OUTPUT);      //Setting Pin 13 as an OUTPUT
18  pinMode(BTN_GO, INPUT);       //Setting
19  Pin 2 as an INPUT
20  pinMode(LED_RED, OUTPUT);       //Setting Pin 12 as an OUTPUT
21
22  pinMode(BTN_STOP, INPUT);
23  pinMode(BTN_RESET, INPUT);
24  digitalWrite(BTN_GO,
25  HIGH);
26  digitalWrite(BTN_STOP, HIGH);
27  digitalWrite(BTN_RESET, HIGH);
28}
29
30void
31  loop() {
32  // put your main code here, to run repeatedly:
33  btn_state1 = digitalRead(BTN_GO);
34
35  btn_state2 = digitalRead(BTN_STOP);
36  btn_state3 = digitalRead(BTN_RESET);
37
38  
39  //Once button has been pressed LED stays ON
40  if (btn_state1 == LOW)
41
42  {
43    digitalWrite(LED_GREEN, HIGH);
44    digitalWrite(LED_RED, LOW);
45
46  } 
47  if (btn_state2 == LOW){
48    digitalWrite(LED_GREEN, LOW);
49    digitalWrite(LED_RED,
50  HIGH);
51  }
52  if (btn_state3 == LOW)
53  {
54    digitalWrite(LED_GREEN,
55  LOW);
56    digitalWrite(LED_RED, LOW);
57  }
58}