TTP223B Digital Capacitive Touch Sensor Module YELUFT 20pcs 2-5.5V

Description

Product Overview

The YELUFT TTP223B digital capacitive touch sensor module is engineered for precision and durability. Each sensor features an integrated 11 x 10.5 mm touch area with a detection range of approximately 5 mm, allowing reliable activation through non‑metallic surfaces such as plastic, glass, or thin paper. The module operates on a wide voltage range of 2 to 5.5 V, making it compatible with both 3.3 V and 5 V logic levels commonly used in Arduino, Raspberry Pi, and other microcontroller platforms.

Construction utilizes a high‑quality PCB with a protective epoxy coating that safeguards the internal IC from moisture and dust, extending the lifespan of the sensor in demanding environments. Four M2‑size positioning holes (2.2 mm diameter) provide a secure mounting option, enabling designers to align multiple modules accurately on custom enclosures or development boards.

Technical specifications include three pins – VCC, GND, and SIG – simplifying wiring to a single GPIO pin for output. The SIG pin outputs a digital high or low signal based on touch detection, eliminating the need for analog processing and reducing firmware complexity. The module’s compact dimensions (5.91 x 3.94 x 0.98 inches) and lightweight design (0.441 ounces) make it ideal for space‑constrained projects.

With a package of 20 identical units, developers receive a ready‑to‑use kit that supports batch testing, rapid prototyping, and scalable production. The sensors are pre‑calibrated at the factory, ensuring consistent performance across the entire lot and reducing time‑consuming calibration steps.

Usage

Designed for a broad range of applications, the TTP223B sensor excels in smart‑home installations such as hidden wall switches, touch‑controlled lighting, and interactive appliance panels. Its non‑contact operation allows seamless integration into sleek, minimalist designs where traditional mechanical buttons would disrupt aesthetics.

In educational settings, the module serves as an excellent teaching tool for electronics and programming courses, demonstrating capacitive sensing principles without the need for complex circuitry. Hobbyists can replace mechanical push‑buttons in DIY projects, creating smoother user experiences for wearable devices, portable controllers, and custom game consoles.

Industrial developers benefit from the sensor’s robust voltage tolerance and reliable output, enabling its use in safety‑critical monitoring systems, equipment status indicators, and low‑power automation solutions. The ability to mount the sensor on non‑metallic surfaces expands its versatility across diverse material choices.

Why Choose Us

YELUFT commits to stringent quality control throughout the manufacturing process. Each sensor undergoes functional testing to verify voltage stability, response time, and signal integrity before packaging. This ensures that every unit meets the high standards expected by professional engineers and hobbyists alike.

Our design prioritizes ease of integration. The three‑pin layout eliminates the need for additional components such as resistors or capacitors, allowing developers to connect the sensor directly to a microcontroller’s GPIO pin. The clear labeling on the PCB further reduces wiring errors and accelerates development cycles.

Customer support is backed by a knowledgeable technical team ready to assist with firmware examples, wiring diagrams, and troubleshooting guidance. We also provide comprehensive documentation, including datasheets and application notes, to help users maximize the sensor’s capabilities.

Key Features

• High‑sensitivity capacitive detection up to 5 mm, enabling touch activation through plastic, glass, or thin paper.
• Wide operating voltage range (2‑5.5 V) compatible with both 3.3 V and 5 V logic systems.
• Simple three‑pin wiring (VCC, GND, SIG) reduces circuit complexity and speeds up prototyping.
• Robust epoxy‑coated PCB and precise M2 mounting holes for reliable installation in harsh environments.
• Responsive after‑sales support with detailed documentation and technical assistance for seamless integration.

FAQ

Can the sensor detect touch through a metal surface?

No. The TTP223B module is designed for non‑metallic surfaces. Metal interferes with the capacitive field, reducing sensitivity. For metal applications, consider a different sensing technology such as inductive or resistive sensors.

What is the typical response time of the sensor?

The sensor reacts within a few milliseconds (approximately 5‑10 ms) after a touch is detected, providing near‑instantaneous feedback suitable for interactive user interfaces and real‑time control systems.

Is the module compatible with 3.3 V microcontrollers?

Yes. The TTP223B operates reliably from 2 V up to 5.5 V, making it fully compatible with 3.3 V logic levels used by many modern microcontrollers, including the ESP32, STM32, and Raspberry Pi Pico.

How many sensors can I connect to a single microcontroller?

Each sensor provides a digital output, so you can connect multiple modules to separate GPIO pins. If you need to monitor many sensors, consider using a port expander or multiplexing technique to manage the available pins efficiently.

What warranty does YELUFT offer for this product?

YELUFT provides a one‑year limited warranty covering manufacturing defects. If a sensor fails under normal operating conditions, we will replace the unit or issue a refund, ensuring confidence in the product’s reliability.