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.

Fridge Door Alarm Circuit Diagram using 555 and LDR

Simple Refrigerator/fridge Door Alarm circuit

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

Fridge Door Alarm

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SIMPLE ALARM FOR FRIDGE DOOR - Share Project - PCBWay

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Fridge Door Alarm Circuit

SIMPLE ALARM FOR FRIDGE DOOR - Share Project - PCBWay