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Name: Michael
Status: Student
Age: 15
Location: N/A
Country: N/A
Date: N/A
Question:
What kind of circuit would I need to make a door alarm that when the door opens an alarm or light will sound?


Replies:
You need the sort of circuit that a flashlight has -- say, wire from battery to thumbtack in the door jamb; wire from thumbtack in the door to light; wire from light back to battery.

Tim Mooney


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