Date: Fri, 27 Dec 2024 08:30:05 +0100
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Subject: Re: Damned Projects!
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From: Arie de Muijnck <noreply@ademu.nl>
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On 2024-12-27 02:21, Cursitor Doom wrote:
> On Thu, 26 Dec 2024 15:09:38 -0800, john larkin <jl@glen--canyon.com>
> wrote:
> 
>> On Thu, 26 Dec 2024 19:29:11 +0000, Cursitor Doom <cd@notformail.com>
>> wrote:
>>
>>> Gentlemen,
>>>
>>> I'm currently in the process of building a device which will shut off
>>> the power to a washing machine in the event of a hose failing and
>>> spewing water out all over the floor. This is an eventuality which has
>>> always caused me considerable angst, so I finally decided to do
>>> something about it. After all, those flimsy 'exhaust' hoses go brittle
>>> over time and having one split 'in action' could cause a significant
>>> amount of damage to the surrounding area in a very short time. Having
>>> something to cut the power off instantly as soon as the water hits the
>>> floor would be a very worthwhile addition to the utility room and
>>> beyond.
>>> I came up with a pretty simple design which I've already proven to
>>> work first time at the breadboarding stage. However, turning this
>>> concept into a practical proposition is taking *far* longer than I'd
>>> imagined. I am getting there, but *slowly* and was wondering whether
>>> other people here have the same sort of problem as I invariably do
>>> with these little personal projects they undertake?
>>>
>>> Your hydrophobic pal,
>>> CD
>>
>> Tell us about your design.
>>
>> I recall a water detector made from a clothespin and an aspirin and a
>> couple of pieces of wire.
>>
>> But it doesn't take much current to turn on a mosfet.
> 
> True, and that's what my design relies on. I say "design" but that's
> over-dignifying it. I doubt there's more than 10 components to it all
> told - tops! Still, the most important thing is it works.
> How did the pin/aspirin desgin work??


https://ademu.home.xs4all.nl/download/Waterdetector%20without%20headache.jpg

Arie