| Widely sold, keenly priced and easy to install: what’s not to like about wireless alarm systems? Just this: they are totally unprotected aga...
More about Alarm (115)
| Isn't it embarassing when you miss the birthday of a beloved one? Do you remember birthdays and anniversaries by jotting them down on Post-i...
| Have you missed your wife's birthday? What about the mother-in-law, or son/daughter? Build this project and there will be no more missed ev...
| It happened to me, it may happen to you too someday, maybe it already did; I am talking about a leak in your home’s water supply system like...
| My last Gadget News was about a tag to help find lost items. This time we have another tag but it solves a problem that has rarely been tack...
| Just add a few external components to a standard low-cost smoke alarm and turn it into a universal alarm sounder. You can easily hook up the...
| This small circuit beeps for a couple of seconds when the AC power supply fails or drops out. For the power supply (PSU) we’ll use a small 5...
| It’s often little things that make outdoor living more amenable. This circuit makes it presence felt vociferously when the fixed electricity...
| Small, widely available and dirt-cheap ultrasonic sensors enable us to design both simple and lavish measuring devices for all kinds of rang...
| My neighbor from across the street is close to 90 years old and he is partly disabled. He still lives alone, but every day someone drops by...