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lazer alarm system design

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hitman1988

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hi every one i wanna design a lazer alarm system for my scince project and i wanna yor help any thing you know about it will help so much
 

where you'll place a receiver?
If on the other side - it's symple. If at the sama as tramsmitter - it's difficult. I made so...try to make a distance meter. If you are interested, mail me to
dmitron1036()mail.ru. I have some expirience in it.
 

hi
i reacieved your reply . thank you for it ,but the the email adress you send me is not available . i do not know why . i am very interested by the project , but i do not have a circuit diagram for it . i have very old circuit diagram (it uses relay as a switch ) if you have a modern one please send it to me. and if you have any thing about it send it to . please i need help for this and please send a simple one . i will so greatfull to you .
 

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