Sell KY-027 4pin Magic Light Cup Sensor Module for arduino best price

dimming principle is to use the principle of two modules brightness changes for pwm.   Mercury switches provide a digital signal that triggers the PWM , through the program design,   We can see the light like two cups filled with the effect of shuffling back and forth.   test code:   int LedPinA = 5;   int LedPinB = 6;   int ButtonPinA = 7;   int ButtonPinB = 4;   int buttonStateA = 0;   int buttonStateB = 0;   int brightness = 0;   void setup()   {   pinMode(LedPinA, OUTPUT);   pinMode(LedPinB, OUTPUT);   pinMode(ButtonPinA, INPUT);   pinMode(ButtonPinB, INPUT);   }   void loop()   {   buttonStateA = digitalRead(ButtonPinA);   if (buttonStateA == HIGH && brightness != 255)   {   brightness ++;   }   buttonStateB = digitalRead(ButtonPinB);   if (buttonStateB == HIGH && brightness != 0)   {   brightness --;   }   analogWrite(LedPinA, brightness); //   analogWrite(LedPinB, 255 - brightness); //   delay(25);   }