Cultural relics museum metal detection volice alarm circuit

Published:2011/9/4 21:09:00 Author:TaoXi | Keyword: Cultural relics museum, metal detection, volice alarm | From:SeekIC

Some memorial halls, museums and treasure exhibition halls always have the unpleasant inspection to prevent the metal objects of the visitors. This circuit is installed at the entrance of the hall, it can detect the metal objects automatically and send out the voice of Please do not bring the metal products inside . This circuit is as shown in the figure.



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