TTP223B Digital Capacitive Blue Touch Sensor Module

TTP223B Digital Capacitive Blue Touch Sensor Module

The TTP223B Capacitive Touch Sensor Module is a compact and reliable touch input interface that replaces traditional mechanical buttons with a simple finger touch. Based on the TTP223B capacitive touch IC, this module detects human touch using capacitance changes and outputs a clean digital HIGH/LOW signal, making it ideal for modern electronics and interactive projects.

Its blue PCB design, low power consumption, and easy interfacing make it a popular choice for Arduino, ESP32, and other microcontroller-based applications.

Key Features

• Capacitive Touch Detection: Responds to human touch without physical pressure
• Digital Output: Provides stable HIGH/LOW signal for direct MCU interfacing
• Single-Channel Touch Sensor: Simple and effective touch input solution
• Low Power Consumption: Suitable for battery-powered devices
• Fast Response Time: Instant touch detection
• Compact Design: Small PCB for easy integration
• Configurable Modes: Supports toggle and momentary output (via onboard pads)

Technical Specifications

• IC Chip: TTP223B
• Operating Voltage: 2.0V – 5.5V DC
• Output Type: Digital (HIGH/LOW)
• Current Consumption:
  • Active: 3-5µA
  • Low Power Mode: 1.5µA
• Response Time: 60ms (low power mode)
• Touch Area: Integrated capacitive pad on PCB
• Auto Calibration: Yes (power-on calibration)
• Dimensions: 24 x 24 mm
• Operating Temperature: -20°C to +70°C

How the Capacitive Touch Sensor Works

The module works on capacitive sensing technology:

• The sensor continuously monitors capacitance on the touch pad
• When a finger touches the pad, capacitance increases
• The TTP223B IC detects this change and toggles the output
• Touch detected → Output HIGH (or toggled state)
• No touch → Output LOW (default)

Configurable Operating Modes

Using onboard solder pads:

• Momentary Mode (Default) → Output HIGH only while touched
• Toggle Mode → Touch once ON, touch again OFF
• Active High / Active Low Output (configurable)

Applications of TTP223B Touch Sensor Module

• Touch-based switches and controls
• Home automation systems
• Interactive panels and devices
• Replacement for mechanical push buttons
• DIY electronics and Arduino projects
• Smart lighting control systems

Advantages of Capacitive Touch Sensors

• No mechanical wear (long lifespan)
• Silent operation
• Easy to use and integrate
• High sensitivity and reliability
• Low power consumption

Usage Tips for Optimal Performance

• Avoid placing near strong electrical noise sources
• Keep touch area clean and insulated if needed
• Can be placed behind thin materials (plastic, glass)
• Use shielding for stable performance in noisy environments
• Allow auto-calibration after power-on

Note: Images are for Illustration Purposes Only.