This simple Door Chime protects the door and gives a loud Alarm tone when there is an attempt of theft. The circuit is too simple and battery operated. A Normally Closed (NC) reed switch and magnet is ...

Now you can build your own simple door alarm security system using a tiny microcontroller chip PIC12F635! The circuit is nothing but an aural alert unit, which raises ...

A simple, cost-effective, and reliable security alarm system that triggers when a door or window is opened, using a magnetic reed switch without the need for a microcontroller. 🚀 Project Overview ...

As California highway slides toward sea, the fix will take billions $2K tariff checks would go to ‘working families’: Bessent ...

In the CBBC series The Dumping Ground, Izzy, Dita and Erin use the BBC micro:bit to create a radio door alarm to monitor the door to their secret den. They set up a trap as they want to find out who ...