Hey everyone! I'm a total newbie to electronics and I've decided to work on a school project where I need to create a fridge door buzzer. The idea is that when the fridge door isn't closed for about 15 seconds, it should buzz to alert us. I really have no clue how to kick this off, and neither do my friends. Could anyone suggest a tutorial or provide a list of items I need to get started? I would appreciate any help. Thanks!
4 Answers
Keeping it simple is key! I suggest getting a normally closed magnetic switch, an industrial timer, and a buzzer. This setup should be straightforward and effective for your project.
You’ll definitely need a switch, a timer, a buzzer, and some batteries. Those are the basics to get you started! Just make sure the buzzer is loud enough to be heard when the fridge door is open.
You can try using an Arduino Uno with a passive buzzer and a limit switch. Program it to buzz if the switch isn’t pressed for more than 15 seconds. You can power it via USB or a power bank. Once you get it working, you might want to shrink it down with an Arduino Nano, a distance sensor, and a battery module for a more compact version. Happy building!
I found a good resource that might help you out: check out this Instructable on using a buzzer with a 555 timer. It explains how to set up a switch that toggles, which could work perfectly for your buzzer project. Just search for door switch and you should find what you need to connect it all together!