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 ...

[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 ...

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 ...