Why is it sometimes digital alarms sometimes don't go off? Every once
in a while, you find that when they reach the appointed hour, they
simply remain silent. The old-style 'bell & ringer' mechanical alarm
clocks never failed AFAICR. Why do electronic ones sometimes do so?
On 25/02/2024 9:26 pm, Cursitor Doom wrote:
Why is it sometimes digital alarms sometimes don't go off? Every once
in a while, you find that when they reach the appointed hour, they
simply remain silent. The old-style 'bell & ringer' mechanical alarm
clocks never failed AFAICR. Why do electronic ones sometimes do so?
The battery is usually too close to flat to make an audible noise - CMOS >logic and LCDs usually keeps on working until the battery voltage
collapses, but you can't draw enough current when the battery is close
to end of life to make an audible sound.
The first thing to do when anything battery powered goes wonky is to put
in a new battery. Checking the battery voltages while you are doing that
can be informative.
Piezo-electric speakers can get damaged when you drop the device, even
the though the shock isn't big enough to damage the rest of the electronics.
With a mechanical alarms you can see any damage. Modern stuff isn't
quite as easy to inspect.
Why is it sometimes digital alarms sometimes don't go off? Every once
in a while, you find that when they reach the appointed hour, they
simply remain silent. The old-style 'bell & ringer' mechanical alarm
clocks never failed AFAICR. Why do electronic ones sometimes do so?
On Sun, 25 Feb 2024 10:26:26 +0000, Cursitor Doom <cd@notformail.com>
wrote:
Why is it sometimes digital alarms sometimes don't go off? Every once
in a while, you find that when they reach the appointed hour, they
simply remain silent. The old-style 'bell & ringer' mechanical alarm
clocks never failed AFAICR. Why do electronic ones sometimes do so?
Because they probably run Linux and have a million lines of code.
On Sun, 25 Feb 2024 07:06:31 -0800, John Larkin <jl@997PotHill.com>
wrote:
On Sun, 25 Feb 2024 10:26:26 +0000, Cursitor Doom <cd@notformail.com> >>wrote:
Why is it sometimes digital alarms sometimes don't go off? Every once
in a while, you find that when they reach the appointed hour, they
simply remain silent. The old-style 'bell & ringer' mechanical alarm >>>clocks never failed AFAICR. Why do electronic ones sometimes do so?
Because they probably run Linux and have a million lines of code.
Sorry, John, but I can't have Linux maligned. AFA stability is
concerned, it's always been *way* more solid than Windows. It's
Windows that has millions of lines of code and thousands of bugs, not
Linux.
On Sun, 25 Feb 2024 17:49:02 +0000, Cursitor Doom <cd@notformail.com>
wrote:
On Sun, 25 Feb 2024 07:06:31 -0800, John Larkin <jl@997PotHill.com>
wrote:
On Sun, 25 Feb 2024 10:26:26 +0000, Cursitor Doom <cd@notformail.com>
wrote:
Why is it sometimes digital alarms sometimes don't go off? Every once
in a while, you find that when they reach the appointed hour, they
simply remain silent. The old-style 'bell & ringer' mechanical alarm
clocks never failed AFAICR. Why do electronic ones sometimes do so?
Because they probably run Linux and have a million lines of code.
Sorry, John, but I can't have Linux maligned. AFA stability is
concerned, it's always been *way* more solid than Windows. It's
Windows that has millions of lines of code and thousands of bugs, not
Linux.
Using a giant OS for a simple application is dangerous. Tasks,
threads, pipes, callbacks, queues, wrappers, daemons, semaphores,
mutexes, abstraction are all great fun, when the application itself is boring.
On Sun, 25 Feb 2024 10:26:26 +0000, Cursitor Doom <cd@notformail.com>
wrote:
Why is it sometimes digital alarms sometimes don't go off? Every once
in a while, you find that when they reach the appointed hour, they
simply remain silent. The old-style 'bell & ringer' mechanical alarm
clocks never failed AFAICR. Why do electronic ones sometimes do so?
Because they probably run Linux and have a million lines of code.
On Mon, 26 Feb 2024 00:28:04 +1100, Bill Sloman <bill.sloman@ieee.org wrote:
On 25/02/2024 9:26 pm, Cursitor Doom wrote:
Why is it sometimes digital alarms sometimes don't go off? Every once
in a while, you find that when they reach the appointed hour, they
simply remain silent. The old-style 'bell & ringer' mechanical alarm
clocks never failed AFAICR. Why do electronic ones sometimes do so?
The battery is usually too close to flat to make an audible noise - CMOS
logic and LCDs usually keeps on working until the battery voltage
collapses, but you can't draw enough current when the battery is close
to end of life to make an audible sound.
The first thing to do when anything battery powered goes wonky is to put
in a new battery. Checking the battery voltages while you are doing that
can be informative.
Piezo-electric speakers can get damaged when you drop the device, even
the though the shock isn't big enough to damage the rest of the electronics. >>
With a mechanical alarms you can see any damage. Modern stuff isn't
quite as easy to inspect.
I'm afraid I've still had alarms fail when none of the above possible
causes applies.
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