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[SNO] 19 [PROJECT NAME] 
Fridge door Alarm: This fridge door alarm is a light sensing circuit. It should be placed in the fridge (enclosed in a small box) near the lamp or close to the opening. When the door is opened, the light from the lamp or outside will fall on it and the buzzer goes off for a certain time and stops. This process repeats until the door is closed. This circuit is useful when the fridge door is not closed or it is kept open for a long time.
Top 25 Electrical Mini Projects for Engineering Students
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