Description Touch pads based on Tontek ICs TTP223 – 1pins, TTP224 – 4pin, TTP 226 – 8 pins, TTP229 – 16 pins For 1 ,4, 8 pins, touching indication LED is on board, you can view the status directly from the LEDs when you press it, but not for 16 pins version. Can replace traditional mechanical keypads, even can use with dielectric materials as pads, high sensitive human touch sensing Direct TTL signal output that can be used by MCUs or arduino Very low power consumption, uA level Capacitive types touch 2.4-5.5V wide range power supply Module can set to many different mode, low power consumption mode, IIC mode, key mode, long-time mode, rapid mode, etc, please refer this to the datasheet below. Mode can be set by jumper on board. ICs need about 0.8~1.0 second for calibration when started, also auto calibration when all keys are not touched, please check datasheet for more details. This module can be placed underneath any isolated materials, like thick glass, plastic case and still sensing, thickness up to 8mm, quite good at 2-4mm. Documentation: schematic, datasheet available on this page.
