Sujet : Re: Damned Projects!
De : robin_listas (at) *nospam* es.invalid (Carlos E.R.)
Groupes : sci.electronics.designDate : 29. Dec 2024, 23:26:15
Autres entêtes
Message-ID : <7tu84lxb5m.ln2@Telcontar.valinor>
References : 1 2
User-Agent : Mozilla Thunderbird
On 2024-12-28 12:39, Wanderer wrote:
On 2024-12-26 14:29, Cursitor Doom wrote:
Gentlemen,
...
>
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.
An optic fibre glass will do as well. Shaped in a curve, without the cover. When wet, the light gets out of the fibre. You may have to search for the right fibre, but I have seen this used commercially.
-- Cheers, Carlos.
Damned Projects!
Re: Damned Projects!
