Build a separate switch for each window and door in your room. Connect them in parallel with long lengths of insulated wire as shown in the third diagram.
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| To use the switch, place it next to the door or window
it will guard, then tape the free end of the string to
the door or window. You may have to tape the switch
down to hold it in place, and you probably will have to
experiment to find the best string length. The idea is this:
When the door or window is opened, the string should
yank the cardboard square loose and close the switch.
Build a separate switch for each window and door in your room. Connect them in parallel with long lengths of insulated wire as shown in the third diagram. |
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