How to make Earthquake Alarm at Home I DIY
#DIY #EntertainmentTV #earthquakealarm #homemadeinvention #EntertainmentTV
How to make Earthquake Alarm at Home
This Video is for educational purposes only!!!
The world's first seismic instrument. In AD 132, Zhang Heng, the scientist of Eastern Han Dynasty, invented the world's first seismic instrument-seismometer and was verified in practical applications. Unfortunately, physical objects and patterns of the seismograph were lost. Only written records were left, and the physical objects were riddled with mysteries.
Earthquake alarm principle:
When shaking small production, the copper wire of the glass beads will contact with the O-shaped lamp, the line is connected, and the buzzer sounds.
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