Project 27 Ambient Light Sensor to Control Brightness of LED

1.Introduction

In this project, we use TEMT6000 ambient light sensor to control brightness of LED.

2.Hardware Required

• Arduino Board *1

• V5 Shield*1

• USB Cable*1

• Shield V5*1

• Piranha LED Module*1

• Ambient Light Sensor*1

• Dupont Line*Several

3.Circuit Connection

Plug Shield V5 into REV4 board and don’t misplace pins to avoid damaging the board.

4.Sample Code

void setup()
{
  pinMode(11,OUTPUT);          //choosing PWM digital output
}
 
void loop()
{
  int n = analogRead(A0);     //reading the value of A0 port（0-5V corresponding to 0-1204）
  analogWrite(11,n/4);         //maximum value of PWM is 255 so analog value n is divided by 4.  
}

5.Result

After uploading the codes, you can change the illumination intensity of the sensor to control the brightness of LED.