Fridge Door Alarm Circuit Diagram using 555 and LDR

This 555 timer IC and LDR based fridge door alarm circuit triggers the alarm if the door of refrigerator is left open for the long time.

Make this Simple Refrigerator Door Open Alarm Circuit - Homemade

Make this Simple Refrigerator Door Open Alarm Circuit - Homemade

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Fridge Door Alarm

Fridge Door Alarm Project

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Solved Need help with this mini project i am doing I need

Fridge Door Alarm Circuit using 555 and LDR