Arduino is an open source electronic platform based on easy-to-use Hardware and Software. The presentation based on "Arduino and Arduino Sensors".

1. 2022
Arduino SenSorS
 Created By - Abhimani Sadeesha
 Grade - 9F
 Date - 2022.02.09

2. Content
01. What is Arduino?
02. Types of Arduino
03. Arduino Sensors;
 Ultrasonic Sensor
 LDR Sensor
 DHT11 Temperature and Humidity Sensor
 PIR Motion Sensor (Passive Infrared Sensor)
Arduino

3. Arduino
What is Arduino?
 Arduino is an open-source electronics platform based on
easy-to-use hardware and software.
 Founder of the Arduino - Massimo Banzi.
Types of Arduino Boards
 Arduino Uno
 LilyPad Arduino
 Arduino Mega
 Arduino Leonardo
 Arduino Nano
 Arduino Red Board
Arduino Sensors
 Ultrasonic Sensor
 LDR Sensor
 DHT11 Temperature and Humidity Sensor
 PIR Sensor
01

4.  Ultrasonic Sensor
 Ultrasonic Sensors measure distance
by using ultrasonic waves.
 Ultrasonic sensors are used primarily
as proximity sensors.
 Parts of the Ultrasonic Sensor
 Diagram of the Ultrasonic Sensor
02 Arduino SenSorS

5.  GND (Ground) - GND connects to the GND in the Arduino.
 Echo (Signal input pin) - Echo pin connects to a digital pin on the
 Trig (Signal output pin) - Trig pin connects to a digital pin on the
 VCC - VCC connects to the 5V pin on the Arduino.
03
Arduino (pin 3).
Arduino (pin 2).
The way how the pins of the Ultrasonic Sensor connects to the
Arduino;

6. Programming code of the Ultrasonic sensor
void setup ( ) {
#define trig 2
#define echo 8
pinMode (echo, INPUT);
pinMode (trig, OUTPUT);
pinMode (10, OUTPUT);
Serial.begin (9600);
}
void loop ( ) {
digitalWrite(trig, LOW);
delayMicroseconds (10);
digitalWrite (trig, HIGH);
delayMicroseconds (10);
digitalWrite (trig, LOW);
long t=pulseIn (echo, HIGH);
long cm=t/29/2;
if (cm<10)
digitalWrite(10, HIGH);
else
digitalWrite(10, LOW);
}
04

7.  LDR (Light Dependent Resistor)
 Parts of the LDR Sensor
 A Light Dependent Resistor (LDR) is a
variable resistor whose resistance decreases
depending on light intensity.
 Light Depending Resistor (LDR) are light
sensitive devices which used to indicate the
presence or absence of light or to measure
the light intensity.
GND
DO (Digital Output) pin
VCC
Sensitivity Adjustment
LDR
05

8.  GND (Ground) - GND connects to the GND on the Arduino.
 VCC - VCC connects to the 5V pin on the Arduino.
 DO (Digital Output) - DO pin connects to a digital pin on the
06
The way how the pins of the LDR Sensor connects to the
Arduino;
Arduino (Pin 7).

9. Programming code of the LDR Sensor
void setup ( ) {
pinMode (12, OUTPUT); //LED Pin
pinMode (7, INPUT); //LDR DO Pin
}
void loop ( ) {
if (digitalRead (7) ==1) {
digitalWrite(12, HIGH);
}
else {
digitalWrite(12, LOW);
delay (200);
}
}
07

10.  DHT11 is a low-cost digital sensor for
sensing temperature and humidity.
 DHT11 Temperature and Humidity
Sensors are the most commonly used
Environmental sensors.
08  DHT11 Temperature and Humidity Sensor
 Parts of the DHT11 Temperature and humidity Sensor
Mounting Hole
GND
DATA pin
VCC
DHT11

11.  GND (Ground) - GND connects to the GND on the Arduino.
 VCC - VCC connects to the 5V pin on the Arduino.
 DATA pin - DATA pin connects to a digital pin on the Arduino.
- This pin is used to communicate between the sensor
and the Arduino.
08 The way how the pins of the DHT11 Temperature and
Humidity Sensor connects to the Arduino;
09

12. #include <dht.h>
dht temp;
void setup ( ) {
Serial.begin (9600);
}
void loop ( ) {
int val = temp.read11 (8);
Serial.print ("Temperature =");
Serial.print (temp.temperature); //reading
Serial.print ("/t Humidity =");
Serial.print (temp.humidity); //line
delay (1000);
//Serial.print
Serial.print ("Temperature =");
if (temp.temperature>20)
digitalWrite (10, HIGH);
else
digitalWrite (10, LOW);
10 Programming code of the DHT11 Temperature and
Humidity Sensor
//Serial.print
Serial.print ("/t Humidity =");
if (temp.humidity>60)
digitalWrite (6, HIGH);
else
digitalWrite (6, LOW);
}

13.  A passive Infrared sensor is an electronic
sensor that measures infrared light radiating
from objects in its field of view.
 PIR Sensors are mostly used
in PIR-based motion detectors.
 Passive Infrared Sensors are commonly
used in Security Alarms and Automatic
Lighting Applications.
 There are three types of motion sensors
that are used frequently;
11  PIR Sensor (Passive Infrared Sensor)
 Passive Infrared (PIR)
 Microwave
 Dual Tech/ Hybrid
Various PIR Sensors
 Parts of the PIR Sensor
Fresnel lens

14.  GND (Ground) - GND connects to the GND on the Arduino.
 VCC - VCC connects to the 5V pin on the Arduino.
 OUT pin - Output pin connects to a digital pin on the Arduino
12
The way how the pins of the PIR Sensor connects to the
Arduino;
(Pin 5).

15. #define pir 7
void setup ( ) {
pinMode (pir, INPUT);
pinMode (12, OUTPUT);
}
void loop ( ) {
//pir sensor
int pir = digitalRead (pir);
if (pir = =1) {
digitalWrite (12, HIGH);
delay (100);
}
else {
digitalWrite (12, LOW);
delay (100);
}
}
13 Programming code of the PIR Sensor