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)

   brighness --;

   analogWrite(LedPinA, brightness); //

   analogWrite(LedPinB, 255 - brightness); //

   delay(25);

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