TechnoFiction

A passive infrared sensor (PIR sensor) is an electronic sensor that measures the infrared (IR) light radiating from objects in its field of observation.  They’re  most frequently  utilized in  PIR-based motion detector systems. PIR sensors are commonly called simply "PIR", or sometimes "PID", for "passive infrared detector". The term passive refers to  the very fact  that PIR devices  don't  radiate energy for detection purposes. They work entirely by detecting  infrared  (radiant heat) emitted by or reflected from the objects. The PIR sensor itself is housed  during a  sealed metal can  to enhance  noise/temperature/humidity immunity.  There’s  a window  made from  IR-transitive material that protects the  detector . Behind the window there are two balanced sensors. In its internal structure,  there's  actually a JFET inside (a  sort of  transistor) which  is extremely  low-noise and buffers the extremely high impedance of the sensors into s

IMPORTANCE A virtual private network (VPN) gives you online privacy and invisibility by creating a private network from a public internet connection. VPN masks your internet protocol (IP) address   so your online actions are virtually invisible. Most important, VPN services establish secure and encrypted connections to provide greater privacy than even a secured Wi-Fi hotspot provides .   HOW VPN PROTECTS OUR IP ADDRESS AND PRIVACY? VPNs essentially create a data tunnel between your own local network and an exit node in another network location, which could be thousands of miles away, making it seem as if you’re in another place and not the actual one. This benefit allows online freedom, and the ability to access your favourite apps and websites. Here’s a closer look at how a virtual private network works. VPNs uses encryption to scramble data when it’s sent over a Wi-Fi network. Encryption makes the data unreadable. Data security is especially important when using a public Wi-Fi net

“The  web  of Things (IoT)  may be a  system that interrelate  totally different  devices like computing devices, mechanical, digital machines, objects, animals or  those that   area unit   given  the  distinctive  identifiers  and also the  ability to transfer  knowledge  over a network  while not  requiring human-to-human or human-to-computer interaction.” What is  web  of Things? In a  shell ,  the web  of Things (IoT)  is that the   conception  of connecting  An y device (so long  because it  has an on/off switch) to  the web  and  alternative  devices. The IoT  may be a   big  network connecting things  and other people  – all of  that  collect and share  knowledge   concerning  the  approach   they're  used and  concerning  the  setting  around them. That includes  a rare   variety  of objects of all  totally different  shapes and sizes – from  good  microwaves  that   mechanically  cooks your food for  the correct  length  of your time , to self-driving cars, whose  advan

  The ultrasonic sensor An ultrasonic sensor is an instrument that measures the distance to an object using ultrasonic sound waves.   An ultrasonic sensor uses a transducer to send and receive ultrasonic pulses that relay back information about an object’s proximity.   The sensor consists of 4pins  :   .VCC-5V ,INPUT POWER .TRIG-Trigger input .ECHO-Echo Output .GND-Ground It has two modules one transmitter and one receiver.   HARDWARE SETUP OF ULTRASONIC SENSOR:   Connect Trig pin to pin D12 on the Arduino board. Connect the Echo pin to pin D13 on the Arduino board. Connect VCC pin to 5V pin on the Arduino board. Connect the GND pin to the GND pin on the Arduino board.   Explanation :   Provide input to TRIG input then enables the module to transmit ultrasonic burst. If there is an obstacle detected in front of the module then it will reflect those ultrasonic waves. If the signal comes back, the ECHO output will be high for some specific ti