Connecting the other components

Now we connect the LDR photoresistor and the LED to the Arduino Uno board according to the following scheme:


LDR photoresistor

Arduino Uno

Terminal 1

+ 5v

Terminal 2

A0

Terminal 2

GND (through 4.7kΩ resistor)

5mm white LED.

Arduino Uno

Long terminal

Pin 3

Short terminal

GND (through 4.7kΩ resistor)

 

Wiring scheme:

image-10