Editor's note: MVS Chandrashekhar is a professor of electrical engineering at the University of South Carolina. In this interview, he explains how smoke detectors work and why they sometimes sound an alarm for what seems like no reason. Why do smoke detector alarms go off even when there's ...
The most likely reason smoke detectors go off unexpectedly is thatpeople aren't changing the batteries in them often enough. ... That's because smoke in the air will reduce the current. If your battery is dying, the current that's flowing through your sensor also goes down. And so you ...
The 5 best smart smoke detectors for your home in 2024 You should never ignore the importance of smoke detectors, but old models are being replaced by smart smoke detectors for more safety features and extra convenience. If you haven't upgraded yet, it's highly recommended that you do so w...
Carbon monoxide detectors don’t last forever. They need to be replaced every 5 to 10 years depending on the brand and model. Some newer models will alert you when they’ve reached the end of their useful life. Regularly check the battery and test your detectors monthly to ensure they’re...
Smoke Detector False Alarm – No Smoke That very next morning at 5 am the smoke alarms went off again. Now I realized that it’s was not my daughters cooking but the smoke detectors must have a dirty sensor. Smoke Detector False Alarm is most commonly caused by something interfering with ...
One company sold him about a hundred broken detectors for a dollar apiece. But his merit badge did not tell him where the americium was located, so he wrote to an electronics firm in Illinois. Someone there wrote back to say she’d “be happy to help out with ‘your report’.” ...
The reduction in current sets off the alarm circuit. Photoelectric detectors respond faster and more effectively to the large smoke particles generated by a smoldering, slow-burning fire. Ionization detectors respond faster to the tiny smoke particles released by a fast-burning fire. For this reason...
Experimenting with Balanced Mixers and Product Detectors. Paul VK3HN Suggests the MC1496 chip; Walter KA4KXX points to SSDRA circuits But it is on the air! Using the PA from a BITX40 module and an RD06. Put an OLD dial from Pericles HI8P on 15-10 version 1. Soul in the new mac...
We have just finished a major house refurb and seem to have a lot of detectors dotted all over the place. They are all of the micro size though, so not intrusive — not that you'd make that a deal breaker when it comes to saving your life. They all have ten year batteries. I ...
Another thing that's important to understand with air sampling smoke detectors is the transport times. And so we're going to talk about how they work. But we are transporting air from sampling ports in the system back to the detector so the detector can measure for smoke, and the timing ...