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don
Guest
Fri Feb 05, 2010 5:21 pm
Has anyone found a 7-seg dual color LED display ??
I would like Yellow and Green colors, one display, dual function.
thanks,
don
Tim Watts
Guest
Fri Feb 05, 2010 6:34 pm
don <don> <@invalid>
wibbled on Friday 05 February 2010 15:21
Quote:
Has anyone found a 7-seg dual color LED display ??
I would like Yellow and Green colors, one display, dual function.
thanks,
don
Kingbright do some:
http://www.farnell.com/datasheets/57152.pdf
(Red, Green - should do what you want assuming the colour mixing is OK).
--
Tim Watts
Managers, politicians and environmentalists: Nature's carbon buffer.
don
Guest
Fri Feb 05, 2010 6:55 pm
Tim Watts wrote:
Quote:
don <don> <@invalid
wibbled on Friday 05 February 2010 15:21
Has anyone found a 7-seg dual color LED display ??
I would like Yellow and Green colors, one display, dual function.
thanks,
don
Kingbright do some:
http://www.farnell.com/datasheets/57152.pdf
(Red, Green - should do what you want assuming the colour mixing is OK).
Thanks for that.
The application is a programmable timer.
The display would be yellow to set and green for run (count down).
I thought of flashing for set and static for run, but the two color
option seems easier to understand.
don
DJ Delorie
Guest
Fri Feb 05, 2010 7:31 pm
don <don> writes:
Quote:
I thought of flashing for set and static for run, but the two color
option seems easier to understand.
Unless you're colorblind.
don
Guest
Fri Feb 05, 2010 8:19 pm
DJ Delorie wrote:
Quote:
don <don> writes:
I thought of flashing for set and static for run, but the two color
option seems easier to understand.
Unless you're colorblind.
Hmmm, good point.
don
Jon Kirwan
Guest
Fri Feb 05, 2010 11:10 pm
On Fri, 05 Feb 2010 11:19:22 -0700, don <don> wrote:
Quote:
DJ Delorie wrote:
don <don> writes:
I thought of flashing for set and static for run, but the two color
option seems easier to understand.
Unless you're colorblind.
Hmmm, good point.
don
So flash _and_ use color. More clues are better than fewer.
Jon
Jan Panteltje
Guest
Sat Feb 06, 2010 1:30 am
On a sunny day (Fri, 05 Feb 2010 13:10:21 -0800) it happened Jon Kirwan
<jonk_at_infinitefactors.org> wrote in
<692pm5p2k8sn340ng88ujt552vfovjbesd_at_4ax.com>:
Quote:
On Fri, 05 Feb 2010 11:19:22 -0700, don <don> wrote:
DJ Delorie wrote:
don <don> writes:
I thought of flashing for set and static for run, but the two color
option seems easier to understand.
Unless you're colorblind.
Hmmm, good point.
don
So flash _and_ use color. More clues are better than fewer.
Jon
Use an alphanum display with text set and run ...
Jon Kirwan
Guest
Sat Feb 06, 2010 1:40 am
On Fri, 05 Feb 2010 23:30:44 GMT, Jan Panteltje
<pNaonStpealmtje_at_yahoo.com> wrote:
Quote:
On a sunny day (Fri, 05 Feb 2010 13:10:21 -0800) it happened Jon Kirwan
jonk_at_infinitefactors.org> wrote in
692pm5p2k8sn340ng88ujt552vfovjbesd_at_4ax.com>:
On Fri, 05 Feb 2010 11:19:22 -0700, don <don> wrote:
DJ Delorie wrote:
don <don> writes:
I thought of flashing for set and static for run, but the two color
option seems easier to understand.
Unless you're colorblind.
Hmmm, good point.
don
So flash _and_ use color. More clues are better than fewer.
Jon
Use an alphanum display with text set and run ...
Since we are on the subject, I think sound would help. Needs
a speaker. After all, blind people need programmable timers,
too. ;)
Jon
Bitrex
Guest
Sat Feb 06, 2010 2:56 am
DJ Delorie wrote:
Quote:
don <don> writes:
I thought of flashing for set and static for run, but the two color
option seems easier to understand.
Unless you're colorblind.
Is there a type of colorblindness that makes it difficult to distinguish
between green and yellow? I thought the main kinds were blue-yellow and
red-green...
Bitrex
Guest
Sat Feb 06, 2010 2:58 am
Bitrex wrote:
Quote:
DJ Delorie wrote:
don <don> writes:
I thought of flashing for set and static for run, but the two color
option seems easier to understand.
Unless you're colorblind.
Is there a type of colorblindness that makes it difficult to distinguish
between green and yellow? I thought the main kinds were blue-yellow and
red-green...
Nevermind, green is of course blue and yellow...<facepalm>
D Yuniskis
Guest
Sat Feb 06, 2010 3:20 am
Bitrex wrote:
Quote:
DJ Delorie wrote:
don <don> writes:
I thought of flashing for set and static for run, but the two color
option seems easier to understand.
Unless you're colorblind.
Is there a type of colorblindness that makes it difficult to distinguish
between green and yellow? I thought the main kinds were blue-yellow and
red-green...
Yes, achromatopsia. Though *considerably* less common than R-G.
Note that color blindness may also be a temporary condition
brought on my illness (migraine, etc.) as well as "acquired"
with age. It can also affect only *portions* of your
field of vision.
Glenn Gundlach
Guest
Sat Feb 06, 2010 4:32 am
On Feb 5, 4:56 pm, Bitrex <bit...@de.lete.earthlink.net> wrote:
Quote:
DJ Delorie wrote:
don <don> writes:
I thought of flashing for set and static for run, but the two
color
option seems easier to understand.
Unless you're colorblind.
Is there a type of colorblindness that makes it difficult to
distinguish
between green and yellow? I thought the main kinds were blue-yellow
and
red-green...
My 13 year old boy has exactly that problem with a Nintendo DS that
uses a red/green LED for battery state.
G²
Bitrex
Guest
Sat Feb 06, 2010 5:21 am
D Yuniskis wrote:
Quote:
Bitrex wrote:
DJ Delorie wrote:
don <don> writes:
I thought of flashing for set and static for run, but the two color
option seems easier to understand.
Unless you're colorblind.
Is there a type of colorblindness that makes it difficult to
distinguish between green and yellow? I thought the main kinds were
blue-yellow and red-green...
Yes, achromatopsia. Though *considerably* less common than R-G.
Note that color blindness may also be a temporary condition
brought on my illness (migraine, etc.) as well as "acquired"
with age. It can also affect only *portions* of your
field of vision.
I was looking at the chart here:
http://en.wikipedia.org/wiki/Color_blindness
that shows what a rainbow looks like to people with various forms of
color blindness. It seems that if one were to make the data in a
two-color display either blue and orange or indigo and green, one would
cover all the bases and have a combination that would be easily
distinguished by those with various types of color blindness, except of
course the kind you mention that is a complete lack of color perception.
I remember reading that some military radar screens used blue
and orange as a color combination, but I think that was because some
study indicated it was the color combination easiest to stare at for
long periods of time...
D Yuniskis
Guest
Sat Feb 06, 2010 6:03 am
Bitrex wrote:
Quote:
D Yuniskis wrote:
Bitrex wrote:
DJ Delorie wrote:
don <don> writes:
I thought of flashing for set and static for run, but the two color
option seems easier to understand.
Unless you're colorblind.
Is there a type of colorblindness that makes it difficult to
distinguish between green and yellow? I thought the main kinds were
blue-yellow and red-green...
Yes, achromatopsia. Though *considerably* less common than R-G.
Note that color blindness may also be a temporary condition
brought on my illness (migraine, etc.) as well as "acquired"
with age. It can also affect only *portions* of your
field of vision.
I was looking at the chart here:
http://en.wikipedia.org/wiki/Color_blindness
that shows what a rainbow looks like to people with various forms of
color blindness. It seems that if one were to make the data in a
two-color display either blue and orange or indigo and green, one would
cover all the bases and have a combination that would be easily
distinguished by those with various types of color blindness, except of
course the kind you mention that is a complete lack of color perception.
Even with particular types of color blindness (red-green, for
example), you can chose the colors such that a color blind person
can perceive the *difference* -- though they may not be able to tell
which color is which.
E.g., ages ago, when my Dad applied for his (initial) driver's
license, the examiner showed him a stoplight and asked the
meaning of each (lit) "indicator". At one point, he rotated the
"display" sideways instead of the familiar vertical orientation.
Not knowing which end was the "top", my father couldn't
tell "stop" from "go".
Quote:
I remember reading that some military radar screens used blue
and orange as a color combination, but I think that was because some
study indicated it was the color combination easiest to stare at for
long periods of time...
Or, perhaps the phosphors had the longest persistence?
Charlie E.
Guest
Sat Feb 06, 2010 12:57 pm
On Fri, 05 Feb 2010 15:40:58 -0800, Jon Kirwan
<jonk_at_infinitefactors.org> wrote:
Quote:
On Fri, 05 Feb 2010 23:30:44 GMT, Jan Panteltje
pNaonStpealmtje_at_yahoo.com> wrote:
On a sunny day (Fri, 05 Feb 2010 13:10:21 -0800) it happened Jon Kirwan
jonk_at_infinitefactors.org> wrote in
692pm5p2k8sn340ng88ujt552vfovjbesd_at_4ax.com>:
On Fri, 05 Feb 2010 11:19:22 -0700, don <don> wrote:
DJ Delorie wrote:
don <don> writes:
I thought of flashing for set and static for run, but the two color
option seems easier to understand.
Unless you're colorblind.
Hmmm, good point.
don
So flash _and_ use color. More clues are better than fewer.
Jon
Use an alphanum display with text set and run ...
Since we are on the subject, I think sound would help. Needs
a speaker. After all, blind people need programmable timers,
too. ;)
Jon
Hey, you better believe it!
SWMBO has this nice calculator, a Sharp that hasn't been made in
years, that both speaks the numbers when she calculates, it also has a
timer, alarm and CALENDAR! I dread the day that this thing finally
give up the ghost, because you can't buy anything like it anymore...
Oh yeah, it also has a nifty timer on it. You set the time (minutes
only) and every five minutes it tells you how much time is left, then
at one minute it warns you, and when your time is up, it tells you
"Your time is up!" and plays camptown races...
Charlie
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