1. R-tist

2. WHAT IS SENSOR???

3. RGB
REDD5 BLUE
D3
GREEN
D6

5.  See from top to both Led .
 You will see black spot on one led.
 On another one you will see grey spot.
 The led consisting of black spot is the iR
receiver (ir transister).
 Another one is ir emmiter.
 If you see only white spot then it is normal
led.

7.  Ir sensor work on property of ir light that ir
light absorbed by black surface and totally
reflected by white surface.
 Ir led emit ir light which is reflected by
surface is absorbed by ir transistor(ir
receiver).
 Ir receiver work on property that when light
fall on an transister on his base emitter resion
than its CE current increases due to emition
of electron.

8.  The ir receiver work on reverse biased.

9.  Ldr work on the principle of that when light
on the metal its resistance decreases.

12. Program on variation of intensity of RGB using LDR sensor.

13.  int sec1=3;  void loop()
 int sec2=5;  {
 int sec3=6;  sem` 1 21` =
 int temp=A3; analogRead(temp);
 int sem; 
 analogWrite(3,sem);
 void setup() 
 {  analogWrite(5,sem);
 pinMode(3, OUTPUT); 
 pinMode(5, OUTPUT);  analogWrite(6,sem);
 pinMode(6, OUTPUT); 
 }  }