This home smoke detector circuit warns the user against fire accidents. It relies on the smoke that is produced in the event of a fire and passes between a bulb and an LDR, the amount of light falling ...

This photoelectric smoke detector circuit uses one LED and 2 LDRs to detect the smoke and sound an alarm. The LM1801 IC is the best choice for this circuit because we need a few external components ...

Roost’s smart smoke alarm connects to Wi-Fi, comes with a companion app, and lets you know when it’s low on battery. The alarm also alerts you and your loved ones when it detects smoke, just to make ...

[Anders] tipped us off about his hack that re-purposes a smoke alarm as a burglar alarm. Unfortunately, he came home in the middle of a burglary but wanted to be ready the next time someone tries to ...

Gadget lust is a likely common affliction for GeekWire readers. You may be fantasizing about Google Glass or a new iPad Air, but I bet that you haven’t thought about that annoying smoke detector in ...

Q. Popular Mechanics magazine recently listed “101 Gadgets That Changed the World.” Among all the creative and wonderful inventions you will find among them, the automatic smoke detector. However, ...

Maryland’s updated smoke alarm law continues to generate questions from homeowners and others who want to meet the requirements that went into effect Jan. 1, but have technical questions or are unsure ...