There are different types of electromagnetic radiation sensor machines. This one above shows the level of radiation through lights; the bright red light indicates the high radiation it senses buut the green indicates the low level of radiation.
This is a mobile phone radiation sensor that proves the amount of radiations around us through sound and digital numbers. The investigator tried to measure how far the measuring device pick up radiation from usual mobile phones. It is interesting how the distance was over 5 meters and the frequency number increased as the sensor got nearer the phone.
(These two sensors however, dont use Arduino)
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