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Subject: Re: Electronic water faucet: How / what they use ?
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
Date: Sat, 21 Dec 2002 00:15:45 GMT
NNTP-Posting-Date: Fri, 20 Dec 2002 19:15:45 EST
Not so much the flow rate. I want to be able to control the temperature of
the water by mixing the cold and hot. If I have an on/off valve ... it looks
pretty hard ... unless I'm missing something :-).
> >> water faucet: How / what they use ?', on Thu, 19 Dec 2002:
> >> >I've seen several public places with electronic water faucets. What
> >> >valve do they use ? Is it on/off solenoid or some type of stepper
> >> Solenoid valves; there's no need for motorized valves.
> >PWM to control the amout of flow ?
> If you need to control the flow rate, then you need motorized valves.
> But the units in public places use preset mechanical valves to set the
> flow rates.
> PWM on a solenoid valve would create a 'water organ' - incredibly loud
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