You probably don't spend too much time pondering the inner workings of a doorbell, but it's actually a pretty cool device once you get inside. Find out exactly what happens when someone rings your bell.
The super of our apartment building is always going into everyone's apartment when something needs to be fixed. There must be a hundred apartments, but he only carries one key around with him. How does he get into all those apartments?
Security systems can range from do-it-yourself kits for $10 to sophisticated whole-house networks installed by professionals. But most alarm systems are actually built around the same basic design concepts.
I have several smoke detectors in my house, and recently the battery went dead on one of them. It started chirping, so I took the battery out, only to have the others complain about it. My question is, how do all of the smoke detectors talk to one an
A friend told me that the bad smell coming from my toilet indicates that the seal under the toilet is broken and needs to be replaced. He also said that I could probably do the job myself. I'd like to try.
In places where uranium is common in the soil, radon is a popular topic of discussion. Even though radon is "completely natural," it can be a real health hazard. Learn how radon forms and why it is so dangerous.
WD-40 is a must have tool in every person's toolbox. This substance can help with everything from releasing rusty bolts to lubricating automotive parts. But what does WD-40 stand for? Find out in this article.
As the saying goes, "Where there's smoke, there's fire." Smoke detectors are amazing: They're pretty inexpensive, but they save thousands of lives each year. Learn all about nuclear and light-sensing smoke detectors.