CAPACITIVE TOUCH SWITCH MODULE
The module is built on touch-sensing IC TTP223B. In the idle state, the module output remains at 0 ( low0.) , When a finger touches the corresponding position, the module output goes high (1).
If not touched for 12 seconds, switches to low-power mode.
Module can be installed on plastic, glass or non-metallic materials.
Low power consumption
Power supply for 2 ~ 5.5V DC
Can replace the traditional push button
Min Typical Max Unit
Power supply voltage VCC 2.0 3 5.5 volt
Output high VOH 0.8VCC V
Output low VOL 0.3VCC V
Output Pin Sink Current
(@ VCC = 3V, VOL = 0.6V) 8 mA
Output pin pull-up current
(@ VCC = 3V, VOH = 2.4V) 4 mA
Response time (low power mode) 220 mS
Response time (touch mode) 60 mS
Size 24x24x7.2 mm
-Control Interface : A total of three pins (GND, VCC, SIG), GND to ground , VCC is the power supply , SIG digital signal output pin ;
-Power Indicator : Green LED, power on ;
-Touch area : Similar to a fingerprint icon inside the area , you can touch the trigger finger .
This sensor is a toggle output type: touch-on then touch-off. That means that when a capacitive load is detected (e.g. a person touches the sensor-pad area) the red LED will alternate turning off and the output pin will go high or low, respectively. This sensor is good for a project where you want to activate something on the first touch, then deactivate it when touching again, like a switch