TTP223 Capacitive Touch Sensor Module Single Channel Self-Lock

The TTP223 Capacitive Touch Sensor Module is a compact, single-channel self-locking touch switch designed for Arduino projects, DIY electronics, and IoT applications. Powered by the TTP223 IC, this module detects capacitive touch input and toggles its output state with each touch — perfect for building custom switches, lighting controls, interactive gadgets, and automation circuits.

With its wide supply voltage range of 2.5V to 5.5V, ultra-low power consumption, and SMD package design, this sensor integrates seamlessly into both beginner and advanced electronic builds. The self-locking (toggle) mode means the output stays in its triggered state until the next touch — no need for external latching circuitry.

Key Features

• Single-Channel Capacitive Touch: Detects human touch through non-metallic surfaces — ideal for hidden or panel-mounted switches
• Self-Locking (Toggle) Mode: Output latches ON with one touch and turns OFF with the next — no mechanical switch required
• Wide Supply Voltage: Operates at 2.5V to 5.5V, compatible with 3.3V and 5V microcontrollers including Arduino, ESP8266, ESP32, and Raspberry Pi
• Extended Temperature Range: Rated from -40°C to +85°C for reliable performance across environments
• SMD Package: Compact form factor for easy integration into PCBs and breadboard projects
• Customizable: Supports custom configurations for specialized DIY and IoT builds

Specifications

Common Applications

• Custom touch-activated light switches and LED controllers
• Arduino and microcontroller input modules
• IoT home automation projects
• Interactive DIY gadgets and prototypes
• Panel-mounted hidden touch switches

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Frequently Asked Questions

Q: What does the TTP223 Capacitive Touch Sensor Module do?

A: The TTP223 Capacitive Touch Sensor Module detects a human touch on its sensing pad and toggles a digital output signal. In self-locking mode, the output turns ON with the first touch and turns OFF with the next, acting like a latching switch — no mechanical contact needed.

Q: Is the TTP223 module compatible with Arduino and ESP8266/ESP32?

A: Yes. The module operates at 2.5V to 5.5V, making it fully compatible with 5V Arduino boards, 3.3V ESP8266, ESP32, and Raspberry Pi GPIO pins. Simply connect VCC, GND, and the signal output pin to your microcontroller.

Q: What is the difference between self-locking and momentary mode on the TTP223?

A: In self-locking (toggle) mode — the default configuration of this module — the output latches and stays in its new state after each touch. In momentary mode (which requires a hardware modification), the output is only active while the pad is being touched. This product ships in self-locking mode.

Q: Can the TTP223 module detect touch through glass or plastic?

A: Yes. Because it uses capacitive sensing, the TTP223 can detect touch through thin non-metallic surfaces such as glass, acrylic, or plastic panels — making it ideal for sleek, hidden switch designs in enclosures.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.