Fridge's Door Alarm : 5 Steps - Instructables

Fridge's Door Alarm: I have an old fridge and sometimes the doors stay open wasting energy. So i created this simple Fridge's door alarm which will buzz when the door is open for x seconds.
Fridge's Door Alarm: I have an old fridge and sometimes the doors stay open wasting energy. So i created this simple Fridge's door alarm which will buzz when the door is open for x seconds.

Cheap & Easy Refrigerator Door Alarm - DIY Danielle®

Refrigerator Door Alarm : 7 Steps (with Pictures) - Instructables

Fridge's Door Alarm : 5 Steps - Instructables

Fridge Door Detector Alarm : 13 Steps (with Pictures) - Instructables

Fridge Door Detector Alarm : 13 Steps (with Pictures) - Instructables

Refrigerator Door Alarm : 7 Steps (with Pictures) - Instructables

Upgrade Your Refrigerator Lighting : 4 Steps (with Pictures

Fridge Door Alarm Circuit Diagram using 555 and LDR

Arduino Freezer Alarm : 3 Steps - Instructables

Refrigerator Door Alarm : 7 Steps (with Pictures) - Instructables

Fridge Door Sensor : 3 Steps - Instructables

Refrigerator Door Alarm : 7 Steps (with Pictures) - Instructables

Fridge Door Alarm Circuit Diagram using 555 and LDR

Open Fridge Delay Alarm : 6 Steps (with Pictures) - Instructables