Science and technology small invention self-made earthquake alarm puzzle assembled model equipment scientific experiment diy
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Description
Product Name: Science and Technology Small Production: Earthquake Alarm
Weight: about 55g
Dimensions: 8*6*12.5cm
Packing: opp self-sealing bag
General knowledge of seismograph: In 132 AD, Zhang Heng, a scientist in the Eastern Han Dynasty, invented the seismograph, which was verified in practical application. Unfortunately, the objects and patterns of the seismograph were lost, leaving only written records, and the objects became the mystery of the ages.
Tips: This material does not contain two 5th batteries, please bring your own.
Principle of earthquake alarm: When shaking the small production, the copper wire of glass beads will contact the O-shaped lamp, the line will be connected, and the buzzer will make a dripping sound.
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