A simple chime doorbell uses the magnetic field created by the electromagnet to move a magnetic piston to strike two tone bars. ... When the button is pressed, the circuit closes and the electromagnet moves a contact arm. When the contact arm moves, it interrupts the circuit and the electromagnet stops.
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A simple chime doorbell uses the magnetic field created by the electromagnet to move a magnetic piston to strike two tone bars. ... When the button is pressed, the circuit closes and the electromagnet moves a contact arm. When the contact arm moves, it interrupts the circuit and the electromagnet stops.