In this video, I experiment with creating a window and door alarm using the following materials: a small piece of wood, a mini piezo buzzer, 22 gauge conductor, a battery socket, a 3V battery, an SPDT ...

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 ...

how to make a simple Theft alert door alarm, using dc Motor ...

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 ...

Last month, Ring began taking pre-orders for its Ring Alarm home security system, and today it begins shipping. I've had a chance to spend some time with Ring Alarm, and I've found it's an easy-to-use ...