Project10.Magical Light Cup
=============================

Description
------------
Magic light cup module is able to interact with ARDUINO. The principle is based 
on PWM dimming.The mercury switch on the module can provide a digital signal and 
trigger PWM regulation. The brightness of two modules will be changed together 
through the program design, finally you can see the changing effect that two set 
of cups are pouring the light.

Specification
--------------
- Supply Voltage: 3.3V to 5V
- Interface: Digital

Connect
--------
.. image:: /img/connect/10_bb.png

Code
-----
.. code-block:: c

    int LedPinA = 5;
    int LedPinB = 6;
    int ButtonPinA = 7;
    int ButtonPinB = 4;
    int buttonStateA = 0;
    int buttonStateB = 0;
    int brightnessA = 0;
    int brightnessB= 255;
    void setup()
    {
    Serial.begin(9600);
    pinMode(LedPinA, OUTPUT);
    pinMode(LedPinB, OUTPUT);


    pinMode(ButtonPinA, INPUT);
    pinMode(ButtonPinB, INPUT);
    }
    void loop()
    {
    buttonStateA = digitalRead(ButtonPinA);
    if (buttonStateA == HIGH && brightnessA != 255)
    {
    brightnessA ++;
    }
    if (buttonStateA == LOW && brightnessA != 0)
    {
    brightnessA --;
    }
    analogWrite(LedPinB, brightnessA);
    Serial.print(brightnessA);

    Serial.print("   ");
    buttonStateB = digitalRead(ButtonPinB);
    if (buttonStateB == HIGH && brightnessB != 0)
    {
    brightnessB --;
    }
    if (buttonStateB == LOW && brightnessB != 255)
    {
    brightnessB++;
    }
    analogWrite(LedPinA, brightnessB); 
    Serial.println(brightnessB);
    delay(5);
    }



Phenomenon
-----------
.. image:: /img/phenomenon/10.jpg