TTP223 Capacitive Touch Switch Sensor Module - 10PCS Self-Locking Touch Button Set for Arduino The TTP223 Capacitive Touch Switch Sensor Module is a small touch-button board for replacing mechanical buttons in interactive projects, smart lamps, control panels, toys, and embedded user interfaces. This listing is for a 10-piece set, making it useful for multi-button prototypes or classroom labs. The module works with microcontroller boards such as the ELAB Nano V3, Raspberry Pi Pico W, and LED output modules like the RGB Full Color LED Module. For mechanical multi-key input, compare it with the 4-Way Key Switch Modules. TTP223 modules are sensitive to panel material, grounding, moisture, and nearby metal. Test the module in the final housing and choose momentary or self-locking behavior according to the board configuration. Technical Specifications Parameter Value SKU TB-TTP223 Product Type Capacitive touch switch sensor module set Quantity 10 pcs Touch IC TTP223 family Output Digital touch output Control Mode Self-locking behavior per current product title Typical Supply Commonly used with 2.5V-5.5V TTP223-class circuits; verify module label Interface VCC, GND, signal Applications Touch buttons, lamps, panels, toys, wake inputs Host Requirement Digital GPIO input Board Layout & Label Guide Touch Pad - Finger-sensitive capacitive area. OUT - Digital output to the controller. VCC - Module power input. GND - Ground reference. Mode Pads - Some TTP223 boards include solder options for output behavior. Indicator LED - Shows touch status on many boards. Panel Note - Sensitivity changes behind acrylic, plastic, or glass. Noise Note - Keep away from high-current wires and noisy power supplies. Application Scenarios 1. Arduino Touch Toggle Toggle an LED each time the sensor output is touched. const int touchPin = 2; const int ledPin = 13; bool state = false; void setup() { pinMode(touchPin, INPUT); pinMode(ledPin, OUTPUT); } void loop() { if (digitalRead(touchPin)) { state = !state; digitalWrite(ledPin, state); delay(300); } } 2. Touch Lamp Output Drive a lamp-control relay from the touch output. const int touchPin = 2; const int relayPin = 7; void setup() { pinMode(touchPin, INPUT); pinMode(relayPin, OUTPUT); } void loop() { digitalWrite(relayPin, digitalRead(touchPin)); } 3. MicroPython Touch Button Read the TTP223 output from a Pico-style board. from machine import Pin import time touch = Pin(16, Pin.IN) while True: if touch.value(): print("touch") time.sleep(0.25) time.sleep(0.02) Packing List 10 x TTP223 Capacitive Touch Switch Sensor Module FAQ Q: How many modules are included?A: This listing is for 10 pieces. Q: What does self-locking mean?A: The output can toggle state instead of only acting momentarily, depending on board configuration. Q: Can it work behind plastic?A: Often yes, but test with the final panel thickness. Q: Can I use it with Arduino?A: Yes, connect output to a digital input. Q: Why does it false trigger?A: Moisture, poor grounding, noisy power, or nearby metal can affect capacitive sensing. Q: Can it replace a pushbutton?A: Yes, for many logic-input user interfaces. Q: Does it measure pressure?A: No, it detects capacitive touch. Q: What should I test first?A: Power voltage, output logic, mode behavior, and final enclosure sensitivity.
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