[BlackCow] came up with a simple solution to this problem ... Now, instead of having an alarm that sounds as soon as the door is open, he has a 30 second delay. This helps avoid the “boy ...

How to Make a simple Door Alarm from old phone I've been on 50 cruises. Here are 5 things I never buy on the ships. Sitting too much is a danger not even exercise can undo. Here are 5 tips to move ...

A simple door stop with an alarm can be bought for a low cost. This can be placed behind any door, and when someone goes to open it, an alarm will be triggered. This can give homeowners and ...

If you are looking to build a simple RFID-based security system to secure your important ... simple RFID-triggered mechanism for their office door. It’s a pretty simple setup that is composed ...

Erin: And catch them in the act. Izzy: And we’ll rig up micro:bits to set an alarm when the cupboard door is opened. It’ll be easy. Erin: They’ve hit. Go, go, go! Izzy: We did it by creating ...