3 ms·
It is when the alternative is "fail at a safety-critical task silently". In fact it then tends to become a regulatory requirement, like in this case.
by rcxdude 5y ago
It is when the alternative is "fail at a safety-critical task silently". In fact it then tends to become a regulatory requirement, like in this case.
- taffronaut 5y agoEnd-of-life and/or battery warning for smoke detectors is a solved problem at least amongst established manufacturers serving the European market. Once this mode is triggered the detectors emit a mildly irritating chirp every 30 seconds or so.