The invade break-down caller circuit of the balcony door/window

Published:2011/7/4 20:52:00 Author:Borg | Keyword: invade, caller, balcony door/window | From:SeekIC

See as the figure, the circuit consists of the electric switch and language sound generating circuit, two parts in total. When the alarm line 1 of the balcony is broken down by the invader, it will generate the hurried calling sound immediately.



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