Arduino Ac Light With Hc Sensor

An Arduino project we did for school.

We managed to put a sensor on the AC light, when you are coming in a range of 3meters the lamp wil go on.

It was a very nice project to do and we learnt a lot of it.

Step 1: Things You Need

Packlist:

Arduino

lamp

sensor

relayt module

Step 1:

Connect the relayt module onto the Arduino.

Step 2:

Connect the relayt module and the sensor

Step 3:

Connect the ac light to the relayt module and put some 230 volt on it.

Step 4:

Run the code, its in the .pdf file. Try to read out the code and find a good spot for the sensor to control the relayt module.

Code:

#define RELAY1 10

int trigger = 7;

int echo = 8;

void setup() {

pinMode(10, OUTPUT);

pinMode(RELAY1, OUTPUT);

pinMode(trigger, OUTPUT);

pinMode(echo, INPUT);

Serial.begin(9600);

}

void loop() {

digitalWrite(trigger, LOW);

digitalWrite(trigger, HIGH);

delayMicroseconds(10);

digitalWrite(trigger, LOW);

long duration = pulseIn(echo, HIGH);

long r = 3.4 * duration / 2;

float distance = r / 100;

Serial.print(“duration:”);

Serial.print(duration);

Serial.print(“ , distance=”);

Serial.print(distance);

Serial.println();

if (distance > 180) {

digitalWrite(RELAY1, 0);

} else {

digitalWrite(RELAY1, 1);

}

}