These days, fine dust is serious. The school thought that students should make fine dust alarms because it is a place where they usually live. So we made a fine dust alarm. This fine dust alarm shows the level of fine dust, and low levels indicate blue, green, and red. Install the sensor outside of this fine dust alarm and place the indicator inside. When the indicator turns red, you can close the window. We used the Arduino for the first time. So I was very proud after finishing. If I have a chance next time, I would like to make a better work.
Microdust index scale
we made a machine that showed the level of find dust

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