threshold for 0 and 1
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I have a pin from IC that outputs 1.1 V. BS2 pin is reading this
voltage. BS2 interprets 1.1 V as "1" (high).
What is the voltage range that BS2 will interpret as 0? As 1?
Much thanks in advance.
voltage. BS2 interprets 1.1 V as "1" (high).
What is the voltage range that BS2 will interpret as 0? As 1?
Much thanks in advance.
Comments
basicstampede@y... writes:
>
> I have a pin from IC that outputs 1.1 V. BS2 pin is reading this
> voltage. BS2 interprets 1.1 V as "1" (high).
>
> What is the voltage range that BS2 will interpret as 0? As 1?
>
> Much thanks in advance.
>
>
If I dust off the cobwebs I believe, without looking for my ancient college
texts, that in the digital domain:
Zero is .7 volts or less
One is 2.7 volts to 5 volts
Anything in the middle is no mans land. The circuit will do as it wants. It
is best to stay out of there. Digital is more time sensitive than voltage
sensitive.
If you need to sense a voltage level than go to an analog voltage comparator
or A/D Converter.
Hope this helps.
Alan Bradford
Plasma Technologies
[noparse][[/noparse]Non-text portions of this message have been removed]
-- Jon Williams
-- Parallax
In a message dated 6/18/2003 2:18:27 PM Central Standard Time,
basicstampede@y... writes:
> I have a pin from IC that outputs 1.1 V. BS2 pin is reading this
> voltage. BS2 interprets 1.1 V as "1" (high).
>
> What is the voltage range that BS2 will interpret as 0? As 1?
>
> Much thanks in advance.
[noparse][[/noparse]Non-text portions of this message have been removed]
drops to around 0.85 Volts, and now Basic Stamp2 correctly reads it
as "0".
--- In basicstamps@yahoogroups.com, plasmastamp@a... wrote:
> In a message dated 6/18/2003 3:18:42 PM Eastern Daylight Time,
> basicstampede@y... writes:
>
> >
> > I have a pin from IC that outputs 1.1 V. BS2 pin is reading this
> > voltage. BS2 interprets 1.1 V as "1" (high).
> >
> > What is the voltage range that BS2 will interpret as 0? As 1?
> >
> > Much thanks in advance.
> >
> >
>
> If I dust off the cobwebs I believe, without looking for my ancient
college
> texts, that in the digital domain:
> Zero is .7 volts or less
> One is 2.7 volts to 5 volts
> Anything in the middle is no mans land. The circuit will do as it
wants. It
> is best to stay out of there. Digital is more time sensitive than
voltage
> sensitive.
> If you need to sense a voltage level than go to an analog voltage
comparator
> or A/D Converter.
>
> Hope this helps.
> Alan Bradford
> Plasma Technologies
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
voltage divider as an input to the BS2. The program they download
just reports (debugs) whether the I/O pin is high or low. As they
adjust the voltage divider with a trimmer pot, they see a series of
high and eventually a low on the debug screen. When they see the
transition, they stop adjusting the pot and measure the voltage
drop.
They find the tranistion occurs at 1.4 volts, or at two p-n junction
drops.
Paul
> In a message dated 6/18/2003 3:18:42 PM Eastern Daylight Time,
> basicstampede@y... writes:
>
> >
> > I have a pin from IC that outputs 1.1 V. BS2 pin is reading this
> > voltage. BS2 interprets 1.1 V as "1" (high).
> >
> > What is the voltage range that BS2 will interpret as 0? As 1?
> >
> > Much thanks in advance.
> >
> >
>
> If I dust off the cobwebs I believe, without looking for my ancient college
> texts, that in the digital domain:
> Zero is .7 volts or less
> One is 2.7 volts to 5 volts
> Anything in the middle is no mans land. The circuit will do as it wants. It
> is best to stay out of there. Digital is more time sensitive than voltage
> sensitive.
> If you need to sense a voltage level than go to an analog voltage comparator
> or A/D Converter.
>
> Hope this helps.
> Alan Bradford
> Plasma Technologies
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
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