Optical coupling touch switch
A technology of touch switch and optical coupling, which is applied in the field of optical coupling touch switch, can solve the problems of easy damage of mechanical switches, achieve long service life and solve the effect of easy damage of mechanical wear
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[0012] Such as figure 1 As shown, the present invention mainly consists of an optical coupling chip U1, a current switch chip U2, a field effect transistor MOS, a touch panel M1, a touch panel M2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, and a resistor R7 , a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4 and a capacitor C5.
[0013] Among them, the resistor R1 and the capacitor C1 form the first RC filter; one end of the resistor R1 is connected to the touch chip M1, and the other end is connected to the BASE pin of the optical coupling chip U1; the positive electrode of the capacitor C1 is connected to the BASE pin of the optical coupling chip U1 BASE pins are connected, and the negative pole is grounded.
[0014] Resistor R2 and capacitor C2 form a second RC filter; one end of the resistor R2 is connected to the touch panel M2, and the other end is connected to the gate of the field effect transi...
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