Doorbell Mini Model

A simple electric circuit containing a battery, a switch, and an electric motor. When a caller pressed the switch, the battery fed power to the motor and made it spin around and hit on the semispherical iron shell, thus producing the sound.

Fact:
The first electric doorbell was invented by Joseph Henry in 1831. At the time, many homes did not have electricity. So early doorbells were sold with their own attached wires and batteries. The first wireless doorbells worked on a radio transmitter.

₹650 ₹700
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