Supply of high-quality touch switch

Touch switch principle is that you press down, four feet short circuit, there may be two feet feet short circuit switch that, anyway, is pressed turned up bomb off, you press 2, the opening and press 2, Off by touch switch is not implemented, is certainly touch switch signal connected to other circuits, such as single-chip IO port, check your switch is not pressed 2, if it is detected by the two would be executed under the circuit on and off the function, the switch function is to turn on and off twice, you do not switch with a wire short circuit or disconnect the two functions can be achieved