Touch Sensor with Arduino: Wiring, Code, and Examples

1#define readPin 12
2#define LEDPin 11
3int val;
4int brightnessVal = 1;
5int brightnessDirection = 1;
6unsigned long lastTime;
7
8void setup() {
9  // put your setup code here, to run once:
10  pinMode(readPin, INPUT);
11  pinMode(LEDPin, OUTPUT);
12}
13
14void loop() {
15  // put your main code here, to run repeatedly:
16  val = digitalRead(readPin);
17  
18  if(val && brightnessVal < 255 && brightnessDirection == 1){
19    brightnessVal = brightnessVal + 1;
20  }
21
22  if(val && brightnessVal > 0 && brightnessDirection == -1){
23    brightnessVal = brightnessVal - 1;
24  }
25
26  if(val){
27    
28    if((millis() - lastTime) < 400 && (millis() - lastTime) > 50){
29      brightnessDirection = brightnessDirection * -1;
30      }
31
32    lastTime = millis();
33    }
34
35  analogWrite(LEDPin, brightnessVal);
36}