This simple circuit utilizes the zippers from a laptop bag to create an unconventional switch. Using a Circuit Playground Express connected to a laptop as its power source, the alligator clips carry voltage to the zippers first, which are enhanced with a bit of tin foil. If the zippers are touching, indicating that the bag is closed, the circuit will have continuity and light the LED. If the zippers are not touching, the LED will not light up and this indicates that the bag is open. The purpose of this circuit is help users keep their belongings safe by telling them if their bag is open or not.
Video Link: https://youtu.be/BD6VOwXZf1A
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