How to use the online alarm clock
As you hand the shared-corridor smoke-alarm check over to the next person, a 3:34 pm alarm can mark the moment they need to take responsibility. It gives them a clear cue to inspect the detectors along the terrace rather than relying on a hurried verbal reminder. There is still a useful stretch before 4:00 pm, so the handover can include which alarms have already been checked and which remain.
During a smoke-alarm handover, headphones can quietly become the browser’s sound output even when nobody is wearing them. The alarm may appear to be set correctly yet be inaudible in the corridor, so checking the selected audio output and playing a brief test sound can prevent confusion. The smoke-alarm check will receive no warning if the browser alarm stops running because its page has been closed or the phone or computer has gone to sleep; a separate alarm is safer when the inspection cannot be missed.
Once responsibility has changed hands, the remaining afternoon is easier to manage if the inspection has a firm finishing point. Allow enough of the 26-minute window to record any detector that needs attention, return keys, and leave the corridor clear before the next commitment. Keeping a small buffer ahead of 4:00 pm also means an unexpected access problem does not push the rest of the day off schedule.
Common questions
Will it still be right when the clocks change?
Yes. It reads your device's local clock, so the move between GMT and BST at the end of March and October is picked up automatically, as long as the computer's date, time and time zone are set correctly.
Can I use this on a phone?
It works in a mobile browser, but phones lock the screen and suspend background tabs far more readily than a laptop does, which can stop the alarm sounding. For anything important, a desktop or a plugged-in laptop is the steadier option.
Does the alarm still work if I close the tab?
No. Everything runs inside this page, so closing the tab — or quitting the browser altogether — ends the countdown there and then. Leaving it open in the background is all it asks, and switching to another tab makes no difference.
What happens if my laptop goes to sleep before 3:34 pm?
The tab sleeps along with it and the alarm will not sound on time, if at all. If you are relying on it, change the power settings so the machine stays awake, or keep a phone alarm running as well.
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