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Transcript

Automatic Staircase Light

Circuit Diagram

PIR sensors allow you to sense motion, almost always used to detect whether a human has moved in or out of the sensors range. These are made up of pyroelectric sensors which can detect levels of infrared radiations.

Motion Sensor

Working Condition

LDR

LDR basically works on photo conductivity principle. It contains Cadmium Sulphide whose resistance increases when with the intensity of light.

The circuit works on two conditions - one is presence of light in its location and second is presence of human being, only when these two conditions are met, the controller turns the backup light ON.

  • Light Dependent Resistance
  • Motion Sensor

Main Components

We all know that one of the places where power wastage happens most in homes and offices is at staircases. We usually turn on light at stairs and leave it in a hurry. In this project we are going to design a stair case lamp which works on battery and only turn on the lights only when someone is present at there. This circuit can be used to save power and it can be used as an emergency backup light.

Introduction

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