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We often do not pay attention how many times in a day we open the door of a refrigerator and close it. A small circle with an accelerometer notifies us of each more time we open that door and close it, and it really helps us manage to use the energy efficiently by making us not to open and close the door over and over. This device is reset every 24 hours. It is equipped with graphic warning. It is green at first, and the more times you open the door and close it, its color changes into yellow and finally red.
tabriz islamic art university
University of Tehran