TTP223 Capacitive Touch Sensor Module – 1, 4, 8 & 16 Channel

TTP223 / TTP224 / TTP226 / TTP229 Capacitive Digital Touch Sensor Module

Upgrade your electronics projects with this versatile Capacitive Touch Sensor Module, available in 1-channel (TTP223), 4-channel (TTP224), 8-channel (TTP226), and 16-channel (TTP229) configurations. Designed for reliable, low-power touch detection, these compact modules replace traditional mechanical switches with a smooth, responsive capacitive interface — ideal for DIY electronics, Arduino projects, automation systems, smart home builds, and more.

Key Features

• Multiple Configurations: Choose from 1, 4, 8, or 16 touch-channel variants to match your exact project requirements.
• Digital Output: Clean HIGH/LOW digital signal output for easy integration with microcontrollers such as Arduino, Raspberry Pi, and ESP32.
• Capacitive Touch Technology: No physical pressure required — a light finger touch activates each channel for a modern, responsive feel.
• Wide Voltage Compatibility: Operates on standard 3.3V–5V logic levels, making it compatible with most development boards and embedded systems.
• Compact & Breadboard-Friendly: Small footprint with standard pin headers for easy prototyping or permanent installation.
• Low Power Consumption: Efficient design suitable for battery-powered and energy-sensitive applications.
• 4 Color Options: Available in multiple colors to suit your build aesthetics.

Typical Applications

• Arduino & Raspberry Pi touch-input projects
• Smart home lighting and appliance control
• DIY electronic panel switches
• Robotics and automation systems
• Interactive displays and kiosks
• Educational electronics kits

Specifications at a Glance

For guidance on safe electronics prototyping practices, visit the U.S. Consumer Product Safety Commission (CPSC) for consumer electronics safety resources.

Frequently Asked Questions

Q: What is the difference between the TTP223, TTP224, TTP226, and TTP229 touch sensor modules?

A: The key difference is the number of capacitive touch channels: the TTP223 provides 1 channel, the TTP224 provides 4 channels, the TTP226 provides 8 channels, and the TTP229 provides 16 channels. Choose the variant that matches the number of independent touch inputs your project requires.

Q: Are these capacitive touch sensor modules compatible with Arduino and Raspberry Pi?

A: Yes! These modules output a standard digital HIGH/LOW signal and operate on 3.3V–5V, making them fully compatible with Arduino, Raspberry Pi, ESP8266, ESP32, and most other popular microcontrollers and single-board computers.

Q: Do I need any special libraries or coding to use these touch sensor modules?

A: No special libraries are required for basic use. The module outputs a digital signal that can be read directly with a standard digital input pin. For multi-channel variants (TTP224, TTP226, TTP229), you simply read multiple digital pins — one per channel — making integration quick and straightforward even for beginners.

Q: What are common use cases for a capacitive touch sensor module?

A: These modules are widely used in DIY electronics, smart home automation, interactive lighting controls, robotics, custom keypads, educational kits, and any project where a touch-sensitive switch is preferable to a mechanical button.