2. Name ID
1.Wahid Bin Walid Badhan 19-40845-2
2.MD. Rokon Islam Emon 19-43417-2
3.Sanzidul Islam 19-40849-2
4.MD. Bakhtiar Azim Niloy 19-41011-2
5.Shobhan Kumar Saha 19-40911-2
4. What is Sensor?
a device, module, machine, or subsystem
Purpose
to detect events or changes in its environment
send the information to other electronics
Types of Sensor :
1. PIR Sensor(Passive Infra-red sensor).
2. IR Sensor (Infrared Sensor)
3. Pressure Sensor.
4. Light Sensor.
Infrared
Sensor
Pressure
Sensor
5. Passive Infrared Sensor (PIR) Sensor:
measures infrared (IR) light radiating from
objects in its field of view.
6. Work of the PIR Sensor:
Working Voltage: 5v-12v DC
Ranging Distance: 3m-7m (Adjustable)
8. Mechanism of PIR sensor
Detect movement
Frenzei lens focuses the infared signals onto the pyelectric sensor.
9. Mechanism of PIR sensor
let’s connect to the module to the Auduino mode.
o 3pins ground
o a VCC for powering
o a output pin
o two potentiometers
This time can be adjusted from 0.3 seconds up
to 5 minutes.
10. How PIR sensor works for Human Body
Human body
clothing received
the pyroelectric
sensor
In this surveillance mode the
pyroelectric sensor sees the
moving human body
IR constantly
changes the
temperature of the
pyroelectric
material
IR outputs a
corresponding signal,
which is the alarm
signal
11. • PIR sensor based Security Alarm Based System
Switch on the circuit initially
The PIR sensor is powered and detects the IR rays emitted form
any human.
The sensor range of 5meters adjust the pot provided to vary this
distance.
when a presence is detected, the PIR sensor outoutas a logis
valueof 3.5V-5V
this voltage is applied as input to the siren generator IC
12. PIR sensor other uses:
smart home
elevator
all outdoor Lights
common staircases
for Basement or Covered Parking Area
shopping Malls
for garden lights
many more…..