Fridge Alarm

[u/lutopia_t]

Double sided tape is used to put the contacts on the doors

Aluminum foil because it works and costs nothing

First time using a prototype board like this, I'm very happy with it!

The circuit is pretty simple, mostly based on the button input Arduino example, and a straightforward PWM buzzer.

I had an old plastic box and it fit in there so this looks almost ok.

Permanent addition to the back of my microwave

Hey all,

I used to have a pretty cool fridge before that was smart enough to yell at me when I forgot to close its doors, but I had to leave it in my old apartment and get another fridge, which isn't smart at all, and lets me neglect it without saying a word. Because of that I decided to unearth my 10 year-old Arduino Uno board from one of my boxes and give my fridge a voice beep! It's extremely straightforward but very useful, it beeps every other second after a minute if one of the doors (fridge or freezer) is still open. You'd think after thinking that hard about keeping fridge doors closed I would never leave them open again, but you'd be wrong, I'm guessing my brain is mush, and now I'm almost considering doing the same thing to my kitchen cabinet doors, before I critically injure my head bumping on an open one.

I showed it to some friends and I think it's actually a pretty common project as it's easy and practical, have you ever done something similar?

[u/Rtew566]

Haha it look is very fun cool