Interfacing an LED, a buzzer and TTP223 Capacitive Touch Sensor with Arduino Uno

Components Required:

1. Arduino Uno Board

2. TTP223 Capacitive Touch Sensor

3. LED or Buzzer

4. Breadboard

5. Connecting Wires

Do the connection as follows:

Sig Pin of TTP223 Capacitive Touch Sensor - Arduino Digital Pin D7
Vcc Pin of TTP223 Capacitive Touch Sensor - Arduino 5V 
GND Pin of TTP223 Capacitive Touch Sensor- Arduino GND 
LED positive pin - Arduino Digial Pin D13
LED negative pin - Arduino Ground Pin

Source Code:

#define ctsPin 7 // Pin for capactitive touch sensor

int ledPin = 13; // pin for the LED

void setup() {

  Serial.begin(9600);

  pinMode(ledPin, OUTPUT);  

  pinMode(ctsPin, INPUT);

}

void loop() {

  int ctsValue = digitalRead(ctsPin);

  if (ctsValue == HIGH){

    digitalWrite(ledPin, HIGH);

    Serial.println("TOUCHED");

  }

  else{

    digitalWrite(ledPin,LOW);

    Serial.println("not touched");

  } 

  delay(500); 

}