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Subject: Re: high voltage input
Date: Sun, 22 Dec 2002 19:06:54 +0200
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There is no frequency. There are several DC lines of 55V. All I want to do
is learning if there is a voltage on the line or not. To do this I will use
cmos IC's. Because of high voltage, I must reduce it to a level which suits
the cmos' range and also protect it from surges or anything like that.
"John Woodgate" wrote in message
> I read in sci.electronics.design that seyyah wrote
> (in ) about 'high voltage
> input', on Sat, 21 Dec 2002:
> >How can i get an information from a 55VDC line. I need to connect the
> >to a cmos IC. What are my preferences and what do you prefer?
> >1- Dividing voltage with resistors and protect the IC with a zener?
> >2- or using an opto coupler?
> >3- Are there any ic's which accepts high voltages directly?
> >I'm looking for a cost effective solution and also reliability and
> >is important.
> You don't tell us the frequency range and amplitude of the signal you
> are trying to retrieve, so we can't tell you how to do it.
> Regards, John Woodgate, OOO - Own Opinions Only.
> Interested in professional sound reinforcement and distribution? Then go
> PLEASE do NOT copy news posts to me by E-MAIL!
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