Metal Touch Sensor Module

Metal Touch Sensor Module
The "B" variant of the TTP223 series is specifically engineered for power efficiency. It features an intelligent "auto-sleep" cycle that keeps the sensor in a micro-amp state until a touch is detected, making it the superior choice for battery-powered IoT devices and wearables.

Why it’s a Design Essential:
• Invisible Mounting: You can glue this module to the inside of a project box. As long as the enclosure isn't metal, the sensor will detect your finger through the wall (up to ~5mm thick), turning the entire surface of your box into a touch-sensitive button.
• Intelligent Standby: The module stays in a low-power mode to save energy. When touched, it instantly switches to "Fast Mode" for high responsiveness. If untouched for 12 seconds, it automatically slips back into a deep sleep.
• No Mechanical Wear: With no moving parts to break or get stuck, this sensor has a virtually infinite operational life, even in dusty or humid environments.
• Secure Installation: Unlike smaller "stamp" versions of this sensor, this module includes M2 mounting holes, making it easy to screw into a chassis for vibration-proof industrial applications.

Technical Capabilities:
• Operating Voltage: 3.3V to 5.5V (Standard support for Arduino, ESP32, and Raspberry Pi).
• Output Logic: Digital (Active HIGH). The SIG pin outputs 5V (or 3.3V) when touched and 0V when released.
• Response Time: Approximately 60ms in Fast Mode and 220ms in Low Power Mode.
• Sensing Range: Typically detects through 3mm to 5mm of non-metallic material.

Best For:
The TTP223B is the primary choice for hidden panic buttons, smart mirrors, sealed industrial control panels, and battery-operated cabinet lighting.