[Brad] was asked by his Sister to design a motion-based alarm that would help her catch her son sneaking out of the house at night. Obviously this didn’t need to be a long-term installation so he ...

If you have mischievous children or forgetful elderly in your life, you might want to build a couple of these tiny motion detection alarms to help keep them out of harm’s way. Maybe you want to keep ...

November 2, 2012 Add as a preferred source on Google Add as a preferred source on Google If you’re looking for something to do this weekend, consider this PIR (passive infrared) Sensor Alarm project.

Ever wished you had an extra set of eyes on the cookie jar, or somebody making sure the kids aren't sneaking out of their bedrooms when its time to do homework? Looking to help out with these and a ...

This motion detector alarm can detect a moving person from a distance of 1 meter. It uses a dual IR Transmitter-Receiver module HOA1405. When the sensor detects the reflected IR rays, alarm will sound ...

Ever had something that you didn’t want to move from the place it was at? Terrific – good writing is all about shared experience. Yes, lovely reader, yes, today we’re talking about and reviewing the ...

Michelle Starr is CNET's science editor, and she hopes to get you as enthralled with the wonders of the universe as she is. When she's not daydreaming about flying through space, she's daydreaming ...

There are a lot of ways to keep your stuff from getting stolen, but legendary DIYer Kip Kay shows us a $2 alarm that will fit on just about anything. All you need for this is some soldering skills, a ...

The motion sensor switch circuit can automatically turn on a water sprinkler but you can easily use it as a motion sensor light switch or motion activated alarm too. Before beginning the construction ...