Tactile switches work thanks to an integrated circuit and a semiconductor electronic device that controls the conducting / non-conducting states of the circuit. One of its pins is connected to a sensor which in turn is attached to an outer metal plate. When you touch the board with your finger, the sensor detects the pulsation, informing the integrated circuit . This sends a current to the semiconductor device that acts as a switch, opening or closing the alternating current circuit that allows the lights to turn on.
How does a touch switch work?
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