When smoke enters the detector, it disrupts the flow of current ... photoelectric smoke alarms use a beam of light and a sensor to detect smoke particles. The light beam stays fixed, pointed ...

Interested in taking a crack at improving the classic smoke ... the test system is simply a NodeMCU connected to a buzzer and a MQ2 gas sensor. So how does it work? If the detector goes off ...

A key addition to Honeywell's wireless sensor ... signal to the detector to check it is still operational; the detector also sends a confirmation signal back to the panel if requested. This reduces ...