Deutsch   English   Français   Italiano  
<vkripm$103ae$2@dont-email.me>

View for Bookmarking (what is this?)
Look up another Usenet article

Path: ...!weretis.net!feeder9.news.weretis.net!news.quux.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: Cursitor Doom <cd999666@notformail.com>
Newsgroups: sci.electronics.design
Subject: Re: Damned Projects!
Date: Sun, 29 Dec 2024 13:28:22 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 34
Message-ID: <vkripm$103ae$2@dont-email.me>
References: <gqarmjlh9gc54qu1mg410hivqqt7vtg0kn@4ax.com>
	<000463@dontemail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Injection-Date: Sun, 29 Dec 2024 14:28:22 +0100 (CET)
Injection-Info: dont-email.me; posting-host="173759948bcb20f9a9aa2f858b6b626b";
	logging-data="1051982"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX18QvHI9Ruo2kQacNUv111LsEd+jbJspLtM="
User-Agent: Pan/0.149 (Bellevue; 4c157ba)
Cancel-Lock: sha1:4URXok5kB84erBtJvSqdMZJk1Gc=
Bytes: 2696

On Sat, 28 Dec 2024 12:39:15, Wanderer wrote:

> On 2024-12-26 14:29, 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,
>> CD
>>
>>
> The way I've seen water detectors done is with an LED angled to reflect
> off a piece of glass to a photodiode when the glass is dry. When the
> glass is wet the index of refraction of the glass/water is different
> from the glass/air and allows the light to pass through and not hit the
> photodiode. That's how automatic windshield wiper raindrop detectors
> work.

I kind of suspected that was how they worked; nice to have it confirmed.