TTP223 Capacitive Touch Sensor Module
The TTP223 Capacitive Touch Sensor Module is a compact and efficient touch-sensitive input device designed to replace traditional mechanical buttons. Based on the TTP223 touch detection IC, it provides a modern, reliable, and easy-to-use interface for electronic projects. Instead of requiring physical pressure, the module responds to the proximity of a finger, enabling smooth and durable operation with no mechanical wear.
This sensor operates at low voltage (2V–5.5V), making it compatible with popular microcontrollers such as Arduino, ESP8266, ESP32, and Raspberry Pi. Its small footprint and stable performance make it ideal for consumer electronics, DIY projects, and touch-based control panels.
How It Works
The TTP223 uses capacitive sensing technology to detect changes in capacitance when a finger comes close to the sensor pad. Once detected, the module outputs a digital HIGH signal; when the finger is removed, it outputs a LOW signal.
The module supports two modes: toggle mode (touch once to turn ON, touch again to turn OFF) and momentary mode (signal is active only when the sensor is being touched). These modes can be configured by soldering pads on the back of the module.
Key Features
Capacitive touch sensing with TTP223 IC
Single touch input pad for reliable detection
Operating voltage: 2V – 5.5V
Low power consumption in standby mode
Toggle or momentary mode selectable
High sensitivity and fast response
Long lifespan with no mechanical wear
Compact size for embedded applications
Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 2V – 5.5V |
| Output Type | Digital (HIGH/LOW) |
| Response Time | Fast (<60 ms typical) – |
| Modes | Toggle / Momentary selectable |
| Standby Current | Very low (typical <1µA) |
| Dimensions | ~24 mm × 24 mm |
| Compatibility | Arduino, ESP32, Raspberry Pi |
Pin Configuration
| Pin Label | Description |
|---|---|
| VCC | Power supply (2–5.5V) |
| GND | Ground |
| I/O | Digital output signal |
Applications
Replacement for mechanical buttons
Touch-sensitive light switches
Home automation control panels
Interactive electronic projects
Consumer electronics with modern interface
DIY touch input for Arduino and IoT devices
