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Touch Sensor Capacitive Touch Switch Module TTP223B

Touch Sensor Capacitive Touch Switch Module TTP223B

The Touch Sensor Capacitive Touch Switch Module TTP223B is a touch detection device utilizing the TTP223B touch detection IC. Operating as a jog-type capacitive touch switch, it detects finger presence, toggling from low to high output when touched. In low-power mode by default, it activates upon touch and reverts to low-power mode if untouched for 12 seconds. Suitable for installation on plastic, glass, and non-metallic surfaces, it serves as a hidden button alternative for applications like walls and desktops, excluding surfaces with thin metal sheets.

Package Includes:

  • 1 x Touch Sensor Capacitive Touch Switch Module TTP223B

9.45 AED 9.45 AED Tax Included
9.45 AED Tax Included

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Features:

  • Low power consumption: Energy-efficient operation
  • Replaces traditional keys: Serves as a convenient touch-sensing alternative
  • Four M2 screw holes: Easy to install and operate
  • Wide compatibility: Can be installed on plastic, glass, and non-metallic materials
  • Hidden installation: Suitable for use in walls, desktops, and more
  • Quick response: Fast detection and output switching
  • Automatic power-saving mode: Enters low-power mode after 12 seconds of inactivity

Touch Sensor TTP223B

Specifications:

  • Operating voltage: DC 2.0V ~ 5.5V
  • VOH: VCC - 0.8V
  • VOL: VCC - 0.3V
  • Sink current: 8mA @ VCC = 3V
  • Source current: -4mA @ VCC = 3V, VOL = 0.6V, VOH = 2.4V
  • Response time: 220ms (low power mode), 60ms (quick mode)
  • Dimension: 24 x 24 x 7.2mm

Applications:

  • Home automation: Control lights, fans, and appliances
  • Industrial controls: Use in machines and conveyor belts
  • Automotive controls: Use in power windows, sunroofs, etc.
  • Interactive exhibits: Ideal for museums and installations
  • Security systems: For alarms and access control
  • Medical equipment: Touch interface for diagnostics or monitoring systems

Pin Connections:

Pin Description
VCC Power Supply: Connects to +3.3V or +5V
GND Ground: Connects to the negative terminal
SIG Signal Output: HIGH when touched, LOW when not

Pinout Diagram

 

Sample Project:

Circuit:

  • Arduino Uno
  • Capacitive Touch Sensor
  • LED
  • 680 Ohm Resistor
  • Jumper Wires
  • Mini Breadboard

Below is a wiring diagram. An LED with a resistor (1kΩ or less) is connected to light up when the sensor is touched.

Touch Sensor Circuit Diagram

Library:

No external library is required for this module to function.

Code:

int led = 7;

void setup() {
  pinMode(led, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int cap_reading = analogRead(A0);
  float volt_reading = (5.0 / 1023.0) * cap_reading;
  Serial.print(volt_reading);
  Serial.println(" Volts");

  if (volt_reading > 1.5) {
    digitalWrite(led, HIGH);
  } else {
    digitalWrite(led, LOW);
  }

  delay(20);
}

Notes:

  • This module should not be covered with thin sheets of metal or conductive materials, as it may interfere with the capacitive sensing.

References: