gehaz al inzar aho:
when there is light on the cds its ressistance is almost zero , so the electro magnet will attract the thin piece of iron so the alarm wont turn on
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but if the light was cut the ressistance of the cds will be high , so that the spring will be able to make the thin piece of iron return back to its original position so the electric motor will complete the circut of the alarm so the alarm will turn on
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i put the motor to keep the alarm on , even if the light return back on the cds
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but we need to put a transistor to amplify the current that flow through the cds but i dont know how to put it
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and that idea came to me by the idea of LIGHTING THE STREET LIGHT AUTOMATICALLY by the exact same idea
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bas el saraha ana lesa beginner fe el ELECTRONICS 3alashan keda mosh 3aref a7od wala ma7odsh ressistors, la2n ana lesa fe el high school we madarsnash el 7agat deih
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3ala el 3mom ay 7'dmat
