Groups > sci.electronics.design > #733260

Re: Current consumption of LCD kitchen timer?

From	"Carlos E.R." <robin_listas@es.invalid>
Newsgroups	uk.d-i-y, sci.electronics.design
Subject	Re: Current consumption of LCD kitchen timer?
Date	2025-05-13 22:18 +0200
Message-ID	<61mcflxvd8.ln2@Telcontar.valinor> (permalink)
References	(2 earlier) <vvnsuh$3k0fq$1@dont-email.me> <36uu1k9dnlnle60okphglgqdnb9i88umgg@4ax.com> <XnsB2DCB5BD83C431F3QA2@135.181.20.170> <mku12k1ganoovdvd7sai2ha7gjtfd451aa@4ax.com> <XnsB2DD6F310F3261F3QA2@135.181.20.170>

Cross-posted to 2 groups.

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On 2025-05-12 11:55, Pamela wrote:
> On 20:45  11 May 2025, john larkin said:
>> On Sun, 11 May 2025 17:51:56 +0100, Pamela
>> <pamela.private.mailbox@gmail.com> wrote:
>>> On 17:15  10 May 2025, john larkin said:

...

> When I'm cooking the radio is on, the big extractor fan whirring away
> and the tap gets left running (yes!). So beeps from the timer add only
> a little more noise.
> 
> That extra minute of beeping is useful when cooking something like
> pasta (or maybe a hard boiled egg) and you want to cook for just a bit
> longer.
> 
> The question is ... is this truly wasteful on the battery or does it
> make little difference?

I think it doesn't make a difference.

And it is not that trivial to measure, because cmos circuitry only draws 
current at the instant of switching. So, use a scope. Otherwise, I would 
try to measure it.

> 
> I suspect a piezo buzzer doesn't emit repeated sets of beeps without an
> external chip, so the spec sheet may not contain the consumption info.
> 


-- 
Cheers, Carlos.

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Thread

Current consumption of LCD kitchen timer? Pamela <pamela.private.mailbox@gmail.com> - 2025-05-10 14:37 +0100
  Re: Current consumption of LCD kitchen timer? Jeff Layman <jeff@invalid.invalid> - 2025-05-10 15:31 +0100
  Re: Current consumption of LCD kitchen timer? john larkin <jl@glen--canyon.com> - 2025-05-10 07:58 -0700
    Re: Current consumption of LCD kitchen timer? John S <Sophi.2@invalid.org> - 2025-05-10 10:56 -0500
      Re: Current consumption of LCD kitchen timer? john larkin <jl@glen--canyon.com> - 2025-05-10 09:15 -0700
        Re: Current consumption of LCD kitchen timer? Joe Gwinn <joegwinn@comcast.net> - 2025-05-10 14:52 -0400
        Re: Current consumption of LCD kitchen timer? KevinJ93 <kevin_es@whitedigs.com> - 2025-05-10 18:16 -0700
          Re: Current consumption of LCD kitchen timer? john larkin <jl@glen--canyon.com> - 2025-05-11 07:05 -0700
          Re: Current consumption of LCD kitchen timer? John S <Sophi.2@invalid.org> - 2025-05-17 19:29 -0500
        Re: Current consumption of LCD kitchen timer? Pamela <pamela.private.mailbox@gmail.com> - 2025-05-11 17:51 +0100
          Re: Current consumption of LCD kitchen timer? john larkin <jl@glen--canyon.com> - 2025-05-11 12:45 -0700
            Re: Current consumption of LCD kitchen timer? David Wade <g4ugm@dave.invalid> - 2025-05-11 21:40 +0100
            Re: Current consumption of LCD kitchen timer? Pamela <pamela.private.mailbox@gmail.com> - 2025-05-12 10:55 +0100
              Re: Current consumption of LCD kitchen timer? john larkin <jl@glen--canyon.com> - 2025-05-12 07:20 -0700
                Re: Current consumption of LCD kitchen timer? Pamela <pamela.private.mailbox@gmail.com> - 2025-05-12 15:57 +0100
                Re: Current consumption of LCD kitchen timer? john larkin <jl@glen--canyon.com> - 2025-05-12 08:39 -0700
                Re: Current consumption of LCD kitchen timer? alan_m <junk@admac.myzen.co.uk> - 2025-05-18 09:28 +0100
                Re: Current consumption of LCD kitchen timer? john larkin <jl@glen--canyon.com> - 2025-05-18 10:18 -0700
                Re: Current consumption of LCD kitchen timer? Sam Plusnet <not@home.com> - 2025-05-18 19:47 +0100
                Re: Current consumption of LCD kitchen timer? john larkin <jl@glen--canyon.com> - 2025-05-18 12:22 -0700
                Re: Current consumption of LCD kitchen timer? Sam Plusnet <not@home.com> - 2025-05-19 00:47 +0100
                Re: Current consumption of LCD kitchen timer? john larkin <jl@glen--canyon.com> - 2025-05-18 17:38 -0700
                Re: Current consumption of LCD kitchen timer? "Carlos E. R." <robin_listas@es.invalid> - 2025-05-19 13:21 +0200
                Re: Current consumption of LCD kitchen timer? dplatt@coop.radagast.org (Dave Platt) - 2025-05-18 16:39 -0700
                Re: Current consumption of LCD kitchen timer? Joe Gwinn <joegwinn@comcast.net> - 2025-05-12 12:17 -0400
                Re: Current consumption of LCD kitchen timer? liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2025-05-12 17:45 +0100
                Re: Current consumption of LCD kitchen timer? Sam Plusnet <not@home.com> - 2025-05-12 19:53 +0100
                Re: Current consumption of LCD kitchen timer? john larkin <jl@glen--canyon.com> - 2025-05-12 12:53 -0700
              Re: Current consumption of LCD kitchen timer? "Carlos E.R." <robin_listas@es.invalid> - 2025-05-13 22:18 +0200
                Re: Current consumption of LCD kitchen timer? Martin Brown <'''newspam'''@nonad.co.uk> - 2025-05-14 12:02 +0100
          Re: Current consumption of LCD kitchen timer? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2025-05-11 16:32 -0400
            Re: Current consumption of LCD kitchen timer? john larkin <jl@glen--canyon.com> - 2025-05-11 13:57 -0700
              Re: Current consumption of LCD kitchen timer? Paul <nospam@needed.invalid> - 2025-05-12 01:13 -0400
                Re: Current consumption of LCD kitchen timer? piglet <erichpwagner@hotmail.com> - 2025-05-12 06:03 +0000
                Re: Current consumption of LCD kitchen timer? Pamela <pamela.private.mailbox@gmail.com> - 2025-05-12 11:00 +0100
                Re: Current consumption of LCD kitchen timer? John S <Sophi.2@invalid.org> - 2025-05-17 19:40 -0500
              Re: Current consumption of LCD kitchen timer? Sam Plusnet <not@home.com> - 2025-05-12 19:54 +0100
                Re: Current consumption of LCD kitchen timer? john larkin <jl@glen--canyon.com> - 2025-05-12 21:21 -0700
  Re: Current consumption of LCD kitchen timer? Scott <newsgroups@gefion.myzen.co.uk> - 2025-05-11 15:16 +0100
  Re: Current consumption of LCD kitchen timer? Martin Brown <'''newspam'''@nonad.co.uk> - 2025-05-12 12:10 +0100
    Re: Current consumption of LCD kitchen timer? Pamela <pamela.private.mailbox@gmail.com> - 2025-05-12 15:05 +0100
      Re: Current consumption of LCD kitchen timer? Martin Brown <'''newspam'''@nonad.co.uk> - 2025-05-12 21:37 +0100

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