Скачать или смотреть how to Make laser light home security system very easy and low cost

Please watch: "mini power bank/ also solar mobile charger@ using 9 volt battery"
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1. hey guys, today i am going to show you how to make a easy and low cost house security system at your home easily
and friends i want to tell you something is my 1st video and is my new channel "Mr technoboy" please friend subscribe , like and share my video and you can learn also a new project every day with me.
if have a some problems and do not understand anything then ask me on the comment box bellow ... i will definitely help you...
if you want then you can buy any project from me
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working principle of the circuit is:-
'when a person makes a block to the continous flow of laser beam, then the light falling on the LDR gets blocked. then the LDR circuit is active



"tech4 technoboy" is now "Mr technoboy"