Digital Sensor TTP223B Module Capacitive Touch Switch

The TTP223B Module Capacitive Touch Switch is a single-key touch sensor built around the TTP223B touch pad detector IC. Touch the pad on the board and the output pin changes state, so it can replace a mechanical push button with a sealed touch key that has no moving parts to wear out. It runs from 2 V to 5.5 V and connects directly to the digital pins of Arduino, ESP32, ESP8266 and Raspberry Pi boards.

TTP223B Module Capacitive Touch Switch Specifications

• Sensor IC: TTP223B single-key capacitive touch detector
• Operating voltage: 2.0–5.5 V DC
• Output: digital; by default high when touched and low when released
• Modes: momentary or toggle, active high or active low, set with the A and B solder pads
• Pins: 3 (VCC, GND and SIG/I/O)
• Sensing: works through a thin non-metal cover such as plastic or glass

TTP223B Module Capacitive Touch Switch Applications

• Touch buttons for lamps, fans and appliance control panels
• Replacing push buttons in Arduino and ESP32 projects
• Hidden touch keys behind a plastic or acrylic enclosure
• Triggering relays, buzzers or LEDs with a light touch

What's in the Box

• 1 × TTP223B capacitive touch switch module

Tip: Connect VCC to 3.3 V or 5 V, GND to GND and SIG to a digital input, then read it with digitalRead(). The chip calibrates itself when powered on, so keep fingers off the pad for a moment while switching it on.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.