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After deciding on the idea of a seismometer for the Microbit Smart Device Challenge Final Project, I started researching about how seismometers work. I found out that almost all earthquake detectors have a heavy mass suspended in midair from a frame by a spring or a string. Because of the pendulum principle, the heavy mass moves more when in midair. Some of the most sensitive seismometers that can detect even the smallest vibrations are all made in this context. After I read this, I immediately came up with an idea to make my project work. I could tie a very long, thin string to a box, add things in, for example, coins, and suspend it in midair, and finally I could put the micro-bit inside the box, which is programmed to beep and light up once it detects vibrations. By suspending the micro-bit in midair and by making its mass heavier, it would allow it to be even more sensitive to vibrations.