The circuit presented here is a very simple and yet highly effective alarm system for protecting an object. The circuit requires no special devices and can be built using components that you will no ...

Touch the sensor of the alarm with your finger and it starts beeping, goes on for some time and then stops. Touching it again, and it goes again! This little and flexible circuit consists of a touch ...

A few simple components are all it takes to create an over-temperature alarm. The circuit in Figure 1 requires only an ordinary negative-temperature-coefficient (NTC) thermistor, two common ICs, and a ...

If you’re looking for something to do this weekend, consider this PIR (passive infrared) Sensor Alarm project. Not only will the motion-sensing alarm protect your gear from animals and zombies alike, ...

We may earn a commission from links on this page. Whether it's paranoia or past experience, protecting your bag from potential thieves isn't a bad idea. It's also a fun DIY project! The folks over at ...

If you buy something from a Verge link, Vox Media may earn a commission. See our ethics statement. is an editor overseeing The Verge’s product reviews and service journalism programs. Dan has covered ...

Apple names a new and noteworthy app each week as its App of the Week. This week, it’s Simplebot’s Rise Alarm Clock, a universal alarm clock that’s getting quite a bit of buzz in the tech sector.

There are plenty of alarm apps in the Windows Phone Store and AlarmMe is one of the better looking, easy to use options in the Store. The colorful design gives AlarmMe some eye-appeal and the simple ...

Interest in emergency systems rose sharply after 9/11 and remains high. Building owners no longer install fire alarm signaling systems just to satisfy their insurance company. Today, their motivation ...