with scr new alarm Window foil burglar

Posted on Feb 5, 2014

Here is a simple but effective burglar alarm circuit that can be fixed on windows to detect break throughs. The circuit uses a fine wire element fixed as a network through the window glass for sensing the break through. Normally the base of Q1 is held to ground potential by the wire element. So Q1 will be off and SCR H1 will not be conducting, and

with scr new alarm Window foil burglar
Click here to download the full size of the above Circuit.

horn will be off. When the wire element is broken the base of Q1 will be raised to positive potential, Q1 will be on and so SCR H1 (TYN 612) will be ON making the horn to blow and this condition will be latched by the SCR. The circuit remains ON until the normal condition is restored or the power supply is switched OFF. Disclaimer All files are found using legitimate search engine techniques. This site does not and will not condone hacking into sites to create the links it list. We will and do assume that all links found on the search engines we use are obtained in a legal manner and the webmasters are aware of the links listed on the search engines. If you find a URL that belongs to you, and you did not realize that it was "open to the public", please use the report button to notify the blogmaster of your request to remove it or it will remove within 24 hours. This is not an invitation for webblog haters to spam with requests to remove content they feel that is objectionable and or unacceptable. Proof of URL ownership is required. NOTICE: This Blog Has Already Been Reviewed And Accepted By Blogger. com

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