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From: "Don" <g@crcomp.net>
Newsgroups: sci.electronics.design
Subject: Re: Damned Projects!
Date: Fri, 27 Dec 2024 19:04:45 -0000 (UTC)
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Bill Sloman wrote:
> Cursitor Doom 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,
>
> The last time my hot-water tank pin-holed through and spread water all
> over the floor, the plumber that replaced the tank put a shallow
> water-catching tray underneath the new tank and put a battery-operated
> stop valve into the cold water feed. The stop valve can with a water
> sensor that sat in the tray, and turns off the cold water feed if there
> water in the tray.
>
> It's one more thing that screams at me when it's batteries get close to
> running out, but that's less of a pain than a lot of water wrecking the
> carpet, or the parquet that replaced it.
>
> Talk to your local plumbing supplier - it's madness to waste time on
> design when you can buy something off the shelf.

    Madness in Art: A Powerful Connection

    Madness and art have long shared a profound and powerful
    connection, where the boundaries between genius and
    instability often blur. ...

    <https://www.dailyartmagazine.com/madness-in-art/>

The art of электроника: why not create a DIY water alarm with the
venerable 555?

<https://www.codrey.com/electronic-circuits/simple-steam-sensor-build-ahs01ib-absolute-humidity-sensor/>

Electrolysis can cause the DC sensor to degrade over time. An analog
adaptation from resistance to capacitance can curb this effect. The
above sensor needs to be altered to detect a dielectric difference
instead of an ohmic resistance.

Danke,

-- 
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.