Ensuring Potentiometers Move in Sync!

1//pins
2const byte leds[3] = {2, 3, 4};
3const byte potPins[3] = {A0,  A3, A5};
4const byte buttonPin = 5;
5
6//vars
7int potVals[3];
8int highestVal;
9int  lowestVal;
10boolean overShootUp = false;
11boolean overShootDown = false;
12byte  DownUp;
13
14void setup() {
15  //set led pins
16  for(byte i = 0; i < 3; i++)  {
17    pinMode(leds[i], OUTPUT);
18  }
19
20  //set pot pins
21  for(byte  i = 0; i < 3; i++)  {
22    pinMode(potPins[i], INPUT);
23  }
24  //set DownUp  buttonState
25  pinMode(buttonPin, INPUT_PULLUP);
26}
27
28void loop() {
29
30  //finding the highest and lowest pots
31  highestVal = 0;
32  lowestVal = 1024;
33  for (byte i = 0; i < 3; i++)  {
34    potVals[i] = analogRead(potPins[i]);
35    if(potVals[i] > highestVal) highestVal = potVals[i];
36    if(potVals[i] <  lowestVal) lowestVal = potVals[i];
37  }
38
39  DownUp = digitalRead(buttonPin);
40  
41  //setting the direction of travel
42  if (DownUp == HIGH) {
43    if (overShootUp)  {
44     handleShootUp();
45    }
46    else {
47      handleNormalUp();
48    }
49  }
50  if (DownUp == LOW) {
51    if (overShootDown) {
52     handleShootDown();
53    }
54    else {
55      handleNormalDown();
56    }
57  }
58}
59
60
61void  handleNormalUp () {
62  
63  //is one pot going too high
64  if ((highestVal  - lowestVal) > 100){
65    overShootUp = true;
66  }
67  //pots are within range  move them all
68  if (highestVal - lowestVal < 50) {
69    for(byte i = 0; i <  3; i++) {
70      digitalWrite(leds[i], HIGH);
71    }
72  }
73  //if one pot  moves to fast then turn it off
74  else {
75    for(byte i = 0; i < 3; i++) {
76      digitalWrite(leds[i], highestVal - potVals[i] >=40 ? HIGH : LOW);
77    }
78  }
79}
80
81void handleNormalDown () {
82
83  //is one pot going too low
84  if ((lowestVal - highestVal) < 100){
85    overShootDown = true;
86  }
87  //pots  are within range move them all
88  if (lowestVal - highestVal < 50) {
89    for(byte  i = 0; i < 3; i++) {
90      digitalWrite(leds[i], HIGH);
91    }
92  }
93  //if  one pot moves too fast then turn if off
94  else {
95    for(byte i = 0; i < 3;  i++) {
96      digitalWrite(leds[i], highestVal - potVals[i] >=40 ? HIGH : LOW);
97    }
98  }
99}
100
101void handleShootUp() {
102  //check if pot is back in range
103  if (highestVal - lowestVal < 50) {
104    overShootUp = false;  
105  }
106  //pot  is not in range, turn it off
107  else {
108    for (byte i = 0; i < 3; i++) {
109      if (lowestVal == potVals[i]) {
110        digitalWrite(leds[i], HIGH);
111      }
112      if (highestVal == potVals[i]) {
113        digitalWrite(leds[i],  LOW);
114      }
115    }
116  }
117}
118
119void handleShootDown() {
120  //check  if pot is back in range
121  if (highestVal - lowestVal < 50) {
122    overShootDown  = false;  
123  }
124  //pot is not in range, turn it off
125  else {
126    for  (byte i = 0; i < 3; i++) {
127      if (highestVal == potVals[i]) {
128        digitalWrite(leds[i],  HIGH);
129      }
130      if (lowestVal == potVals[i]) {
131        digitalWrite(leds[i],  LOW);
132      }
133    }
134  }
135}