TOUCH SENSOR MODULE
KSH 150.00
Out of Stock
The touch sensor module is a capacitive touch switch based on the TTP223B IC, designed to replace traditional mechanical buttons with a wearfree touchsensitive pad [citation:2][citation:6][citation:7]. It detects human touch through non-metallic surfaces, making it ideal for hidden buttons and modern user interfaces [citation:7][citation:10].
| Parameter | Value |
|---|---|
| IC | TTP223B capacitive touch detector [citation:6][citation:11] |
| Operating Voltage | 2.0V to 5.5V DC [citation:7] |
| Output Type | Digital (active HIGH or LOW) [citation:6][citation:7] |
| Touch Area | 11mm x 10.5mm |
| Sensing Range | ~5mm through non-conductive materials [citation:7] |
| Response Time | 60ms (fast mode) / 220ms (low power mode) [citation:7] |
= Pinout and Wiring =
Pin connections [citation:2][citation:6]:
The module has two jumpers (bridges A and B) to set different trigger modes [citation:2]:
| Bridge A | Bridge B | Mode |
|---|---|---|
| Unsoldered | Unsoldered | Touch to ON (momentary, initially LOW) |
| Unsoldered | Soldered | Touch to OFF (momentary, initially HIGH) |
| Soldered | Soldered | Self-locking (toggle, initially LOW) |
| Soldered | Unsoldered | Self-locking (toggle, initially HIGH) |
Versatile Configurations - Choose between momentary and latching modes [citation:2]
Active Low or High - Selectable output signal polarity
The module works on capacitive sensing principles [citation:3][citation:6]. A small oscillator's frequency is determined by the touchpad's capacitance. When a finger approaches, the body's capacitance changes the oscillator frequency [citation:6][citation:10]. The detector circuit monitors this change and triggers the output when the threshold is crossed [citation:6].
The TTP223B automatically calibrates on powerup and enters lowpower mode after ~12 seconds of no touch [citation:7].
√ Compatible with most microcontroller development boards
√ Simple 3-pin interface
√ Low power consumption for battery projects
No touch response:
Inconsistent triggering:
