If the fridge door is left open for approximately 2-5 minutes, the sound is on and the alarm indicator flashes. The alarm stops after closing the door. During the alarm, the sound can be muted by pressing any button. Frostmatic/Super Freeze function is running. You can cancel Frostmatic by pressing and holding the freezer temperature setting button for three seconds.

These are ideal for keeping butter and dairy products protected from warm air when the door is opened. Humidity-controlled salad crisper drawer When there is a temperature increase in the compartment (for example due to an earlier power failure), the alarm and temperature indicators flash and the sound is on. The Oria freezer alarm comes with a wireless set of two sensors, which accurately measure the refrigerator’s and freezer’s temperature. It has a minimum and maximum temperature display, which updates every 24 hours, but it also has a button that can clear the data and the previously recorded temperatures. Here in this Fridge Door Open Alarm Circuit, we have used two 555 ICs, one for calculate the ‘Fridge door Open time duration’ after which the Buzzer should be triggered, and second 555 IC is for controlling the Buzzer beeping pattern. It requires 1 AA battery to work, so power consumption is not an issue. The device has three buttons to adjust the minimum and maximum temperature.

This freezer alarm is made from stainless steel; therefore, it’s a waterproof and corrosion-free alarm. The temperature reader of the alarm must be accurate with no faulty readings. The alarm’s temperature sensor should not be disfigured; otherwise, it can adversely affect the freezer’s temperature. Also, the temperature range should be extensive for using the customer’s given field. The accuracy rate of devices varies from one to another (for example, some freezers have +/-1°c accuracy rate while some fluctuate more). Freezer Alarm Power Consumption

The alarm indicator continues to flash until normal conditions are restored. If you do not press any button, the sound switches off automatically after around one hour to avoid disturbing you. If your fridge door does not shut correctly, it buzzes immediately, producing a loud sound. It comes with a cable with a length of 2m. Brannan assures the quality of the product and, hence, value for money.Hence, this Fridge Door Alarm Circuit is a good solution which will indicate the user about the door in prolonged open condition. We can also set different pre-set time after which the audible indication has to be given. This is done here by using the versatile 555 timer IC under astable multivibrator mode and LDR. As soon as we open the Door of refrigerator, LDR senses it and start the countdown using 555 Timer, and after a preset time the buzzers starts beeping as alarm signal. NEW: 8th Oct 2012 - Major changes in the ATtiny85 code: better power mode - enabled power save mode to reduce consumption. New code in step 3.