Arduino Projects Vol-I: With Proteus Simulation Files. Don't just read it, Try it... by Manoj Thakur

Author:Manoj Thakur [Thakur, Manoj]
Language: eng
Format: azw3
Published: 2016-06-26T16:00:00+00:00

Figure 7.2: LDR Sensor

A photoresistor (or light-dependent resistor, LDR, or photocell) is a light-controlled variable resistor. The resistance of a photoresistor decreases with increasing incident light intensity; in other words, it exhibits photoconductivity.

Figure 7.3: Automatic Light Controller Circuit

7.3 Automatic Light Controller Arduino Code

/*

circuits4you.com

Day night Switch with Occupancy Sensor (Automatic Light Controller)

*/

const int RELAY=12; //Lock Relay or motor

//Key connections with arduino

const int on_key=3;

const int off_key=2;

int counter=0,manual=0;

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