Dual LED 7 segments
Archiver
Posts: 46,084
Does anyone know the easiest way to connect a dual 7 segment led
display (two numbers) to the stamp for output? I need to use the
fewest pins possible?
Thanks
J
display (two numbers) to the stamp for output? I need to use the
fewest pins possible?
Thanks
J
Comments
Go to www.parallaxinc.com in the download section and download the
StawpWorks Manual in this manual they show
how to multiplex 7-segment displays in Experiments #10 and #29, pages 59 and
137. Experiment #10 you will need 10
(9 if you do not use the decimal point) I/O pins, and in experiment #29 you will
need 3 I/O pins plus additional
components. The code is also included for these experiments either for download
or inputting in yourself.
Have Some Fun !!
Dale Fleischmann
jay_mann2000 wrote:
> Does anyone know the easiest way to connect a dual 7 segment led
> display (two numbers) to the stamp for output? I need to use the
> fewest pins possible?
>
> Thanks
> J
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and Body
of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[noparse][[/noparse]Non-text portions of this message have been removed]
I really appreciate that... I know some of my questions are answered in
documentation that I have not read..Because of the limited time I am not reading
up as much as I should.. Your knowledge in invaluable!
J
Dale Fleischmann <fleidale@c...> wrote: Hi jay_mann;
Go to www.parallaxinc.com in the download section and download the StawpWorks
Manual in this manual they show
how to multiplex 7-segment displays in Experiments #10 and #29, pages 59 and
137. Experiment #10 you will need 10
(9 if you do not use the decimal point) I/O pins, and in experiment #29 you will
need 3 I/O pins plus additional
components. The code is also included for these experiments either for download
or inputting in yourself.
Have Some Fun !!
Dale Fleischmann
jay_mann2000 wrote:
> Does anyone know the easiest way to connect a dual 7 segment led
> display (two numbers) to the stamp for output? I need to use the
> fewest pins possible?
>
> Thanks
> J
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and Body
of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[noparse][[/noparse]Non-text portions of this message have been removed]
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject and Body of
the message will be ignored.
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Do You Yahoo!?
Try FREE Yahoo! Mail - the world's greatest free email!
[noparse][[/noparse]Non-text portions of this message have been removed]
control 8 digits of information.
There is an app sheet on the Parallax Web site. I use them and they work
sweet.
Alan Bradford
Plasma Technologies
on a
chip, E-Labs, Inc. (www.elabsinc.com) has a GREAT chip called the
EDE300
that will do what you want.
The EDE300 is controlled via single line serial communications and
is easy
as cake to get working: If you order one, make sure to get the 4MHz
resonator (for 25 cents extra) as this will be easier than trying to
track
down one on your own...
Hook it up and follow the instuctions included with the chip...minor
modifications (with regard to baud rate only) are required to the
code
enclosed with the chip as the example code is written for a BS1.
All I did
was use the '240' spec in the serout (serout, pin#,240,[noparse][[/noparse]binary spec
data] so
that it would communication at 9600baud 8,even.
This chip is worth the money if you need to save on IO pins...
Just a suggestion....
Bill
--- In basicstamps@y..., "jay_mann2000" <jay_mann2000@y...> wrote:
> Does anyone know the easiest way to connect a dual 7 segment led
> display (two numbers) to the stamp for output? I need to use the
> fewest pins possible?
>
> Thanks
> J
(www.elabsinc.com) EDE300 chip...only uses one serial line and has
all the
control that you need for this application...
Bill McCarthy
bill@w...
--- In basicstamps@y..., plasmastamp@a... wrote:
> You can use a Maxim MAX-7219 controller chip. It uses 3 lines and
can
> control 8 digits of information.
>
> There is an app sheet on the Parallax Web site. I use them and
they work
> sweet.
>
> Alan Bradford
> Plasma Technologies
on a
chip, E-Labs, Inc. (www.elabsinc.com) has a GREAT chip called the
EDE300
that will do what you want.
The EDE300 is controlled via single line serial communications and
is easy
as cake to get working: If you order one, make sure to get the 4MHz
resonator (for 25 cents extra) as this will be easier than trying to
track
down one on your own...
Hook it up and follow the instuctions included with the chip...minor
modifications (with regard to baud rate only) are required to the
code
enclosed with the chip as the example code is written for a BS1.
All I did
was use the '240' spec in the serout (serout, pin#,240,[noparse][[/noparse]binary spec
data] so
that it would communication at 9600baud 8,even.
This chip is worth the money if you need to save on IO pins...
Just a suggestion....
Bill
Original Message
From: "jay_mann2000" <jay_mann2000@y...>
To: <basicstamps@yahoogroups.com>
Sent: Wednesday, March 13, 2002 12:54 PM
Subject: [noparse][[/noparse]basicstamps] Dual LED 7 segments
Does anyone know the easiest way to connect a dual 7 segment led
display (two numbers) to the stamp for output? I need to use the
fewest pins possible?
Thanks
J
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the
Subject and
Body of the message will be ignored.
Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
--- In basicstamps@y..., "jay_mann2000" <jay_mann2000@y...> wrote:
> Does anyone know the easiest way to connect a dual 7 segment led
> display (two numbers) to the stamp for output? I need to use the
> fewest pins possible?
>
> Thanks
> J
http://www.lennard.net.nz/electronics/45lcdstamp.html
This is for an LCD display, but there are simple modifications at the end
for using with LED Displays.
For a 2 digit display, all you will need from the BS2 is 4 lines (Clock,
Data, Strobe digit 1, strobe digit 2).
I've found this circuit works well, and I have recently implemented a 5
digit LED version (using 7 lines to the BS2: Clk, Data, S1-5).
Give me a couple hours, and I'll add a photo to the page...
Ben, Wellington, New Zealand.
--
http://www.lennard.net.nz/
Ben Lennard, NCEE, Dip EE
Web Hosting and Electronics R&D
Club Coordinator, Victoria University of Wellington Hockey Club
Hm: +64 4 972 7567
Mb: +64 21 536 627
87 Spencer Street
Crofton Downs
Wellington
New Zealand
"To the optimist, the glass is half full. To the pessimist, the glass is
half empty. To the engineer, the glass is twice as big as it needs to be."
No animals were harmed in the transmission of this email, although the
Dog next door is living on borrowed time, let me tell you! Those of you
with an overwhelming fear of the unknown will be gratified to learn that
there is no hidden message revealed by reading this warning backwards.
From: "jay_mann2000" <jay_mann2000@y...>
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Dual LED 7 segments
Date: Thu, 14 Mar 2002 6:54 AM
Does anyone know the easiest way to connect a dual 7 segment led
display (two numbers) to the stamp for output? I need to use the
fewest pins possible?
Thanks
J
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[noparse][[/noparse]Non-text portions of this message have been removed]