Laser Security System

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About: please visit my youtube channel Technoreview85 for more DIY project.I make new project regularly link-- https://www.youtube.com/channel/UCQeXzgRuWxVPpJjeWUB65Dw/

It is simple laser security system using LDR

Video link

lets start ----

Step 1: You Need to Make

Bread board or vero board

transistor - cl 100 or bc 548b

LDR

resistor- 1K,10K

LED

Buzzer

Battery ( I use my old mobile phone battery 3.7v)

A laser pointer

Step 2: Making Circuit

make circuit as per diagram

on bread board or vero board

Step 3: Setting Laser Pointer Alignment

for making model project you can fit circuit on a ply board or install it on door

align with LDR & laser pointer.

when laser beam can't goes to LDR then buzzer will ring & led glow

Please subscribe my youtube channel technoreview85 for regular science project

visit my blog technoreview85.blogspot.com

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    3 Discussions

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    abdulr233

    Question 10 months ago on Introduction

    if a did not keep the buzz then it dont sound .am i correct