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Fridggi Open Door Alarm with delay, Fridge Door alarm when left open, 60 seconds delay Alert (white-pack1) : Amazon.com.au: Home Improvement
Fridggi Open Door Alarm with delay, Fridge Door alarm when left open, 60 seconds delay Alert (white-pack1) : Amazon.com.au: Home Improvement
Fridge Door Alarm Circuit
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Fridge door alarm circuit with delay time - YouTube
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Fridge Door Alarm Circuit Diagram using 555 and LDR
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