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How to Make Earthquake Alarm
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This a simple earthquake alarm. The circuit is very simple, it just need LED, active buzzer, batteries, wire and pendulum.
For pendulum you can use bolt or iron rod.
If there is an eartquake the pendulum will touch the wire and buzzer will sound.
For pendulum you can use bolt or iron rod.
If there is an eartquake the pendulum will touch the wire and buzzer will sound.