Touch Sensor Module TTP223B

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*Disclaimer: The images are merely illustrative.

Specifications

1. Operating Voltage: DC 2.0V ~ 5.5V;

2. VOH: VCC 0,8V;

3. VOL: VCC 0.3V;

4. Heatskin Current: 8mA @ VCC = 3V, VOL = 0.6V;

5. Source Current: -4mA @ VCC = 3V, VOH = 2.4V;

6. Response time: 220ms (in low power mode) and 60ms (in fast speed mode);

7. Size: 24 x 24 x 7.2mm

Sample Code:

// Capacitive Touch Sensor Tutorial

// When Sig Output is high, touch sensor is being pressed
#define ctsPin 2 // 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);

}