Many questions for MAX 7219
Archiver
Posts: 46,084
1. Can I make a 64 LED matrix myself or do I have to use one
already assembled? I need a size of about 3' x 3'
2. Are there any schematics out there for wiring 8 columns and 8
rows of LEDs (Multiplexing)? I think I know how to do it, just want
some assurance.
3. Has anyone out there communicated serially through a Mac
program called Max/MSP through the serial object? If so, is there
a special protocol to use? I know the serial object only takes
numbers and when trying to send them to the BS, nothing
happens.
4. How can I test the the MAX7219 from the Pbasic editor to
check my wiring?
Your response are greatly appreciated, for this is part of my
thesis art project.
regards,
Silas
already assembled? I need a size of about 3' x 3'
2. Are there any schematics out there for wiring 8 columns and 8
rows of LEDs (Multiplexing)? I think I know how to do it, just want
some assurance.
3. Has anyone out there communicated serially through a Mac
program called Max/MSP through the serial object? If so, is there
a special protocol to use? I know the serial object only takes
numbers and when trying to send them to the BS, nothing
happens.
4. How can I test the the MAX7219 from the Pbasic editor to
check my wiring?
Your response are greatly appreciated, for this is part of my
thesis art project.
regards,
Silas
Comments
sistarr@h... writes:
> 2. Are there any schematics out there for wiring 8 columns and 8
> rows of LEDs (Multiplexing)? I think I know how to do it, just want
> some assurance.
>
I think you will do better with a 6 x 8 display. The way the inside four
across the top would equal seg f, the inside four at the bottom would equal
seg c. This makes all segs four LEDs.
Sid
[noparse][[/noparse]Non-text portions of this message have been removed]
the matrix, two matrix of 64 led, the only one problem isthis chip
communicate by i2C......
Atentamente.
Ing. Damian Trujillo G.
RIESE & CIA, S.A.
Caracas - Venezuela
Phone: 58-212-7934266/4377
Fax: 58-212-7940791/0908
Email: dtrujillo_riese@c...
Original Message
From: basicstamps@yahoogroups.com
Date: Martes 11 de Marzo de 2003 08:03:19 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Many questions for MAX 7219
1. Can I make a 64 LED matrix myself or do I have to use one
already assembled? I need a size of about 3' x 3'
2. Are there any schematics out there for wiring 8 columns and 8
rows of LEDs (Multiplexing)? I think I know how to do it, just want
some assurance.
3. Has anyone out there communicated serially through a Mac
program called Max/MSP through the serial object? If so, is there
a special protocol to use? I know the serial object only takes
numbers and when trying to send them to the BS, nothing
happens.
4. How can I test the the MAX7219 from the Pbasic editor to
check my wiring?
Your response are greatly appreciated, for this is part of my
thesis art project.
regards,
Silas
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You say the size is 3 feet x 3 feet, is this correct?
If so you will need a huge number of LEDs and power supply and driver circuits
to support them.
Brooke Clarke, N6GCE
http://www.precisionclock.com
> From: basicstamps@yahoogroups.com
>
> Date: Martes 11 de Marzo de 2003 08:03:19 PM
>
> To: basicstamps@yahoogroups.com
>
> Subject: [noparse][[/noparse]basicstamps] Many questions for MAX 7219
>
>
>
> 1. Can I make a 64 LED matrix myself or do I have to use one
>
> already assembled? I need a size of about 3' x 3'
>
> 2. Are there any schematics out there for wiring 8 columns and 8
>
> rows of LEDs (Multiplexing)? I think I know how to do it, just want
>
> some assurance.
>
> 3. Has anyone out there communicated serially through a Mac
>
> program called Max/MSP through the serial object? If so, is there
>
> a special protocol to use? I know the serial object only takes
>
> numbers and when trying to send them to the BS, nothing
>
> happens.
>
> 4. How can I test the the MAX7219 from the Pbasic editor to
>
> check my wiring?
>
> Your response are greatly appreciated, for this is part of my
>
> thesis art project.
>
> regards,
>
> Silas
columnsstretched out 3' x 3', or a total of up to 64 discrete LEDs.
Silas
--- In basicstamps@yahoogroups.com, Brooke Clarke
<brooke@p...> wrote:
> Hello Silas:
>
> You say the size is 3 feet x 3 feet, is this correct?
> If so you will need a huge number of LEDs and power supply
and driver circuits to support them.
>
> Brooke Clarke, N6GCE
> http://www.precisionclock.com
>
>
> > From: basicstamps@yahoogroups.com
> >
> > Date: Martes 11 de Marzo de 2003 08:03:19 PM
> >
> > To: basicstamps@yahoogroups.com
> >
> > Subject: [noparse][[/noparse]basicstamps] Many questions for MAX 7219
> >
> >
> >
> > 1. Can I make a 64 LED matrix myself or do I have to use one
> >
> > already assembled? I need a size of about 3' x 3'
> >
> > 2. Are there any schematics out there for wiring 8 columns
and 8
> >
> > rows of LEDs (Multiplexing)? I think I know how to do it, just
want
> >
> > some assurance.
> >
> > 3. Has anyone out there communicated serially through a
Mac
> >
> > program called Max/MSP through the serial object? If so, is
there
> >
> > a special protocol to use? I know the serial object only takes
> >
> > numbers and when trying to send them to the BS, nothing
> >
> > happens.
> >
> > 4. How can I test the the MAX7219 from the Pbasic editor to
> >
> > check my wiring?
> >
> > Your response are greatly appreciated, for this is part of my
> >
> > thesis art project.
> >
> > regards,
> >
> > Silas
The MAX7219 is easy to interface with. Just follow the examples on
Parallax's website and in the NutsandVolts magazine articles (also on the
web). The only thing I had trouble with is being very careful to not
exceed the voltage and current maximum's on the 7219 (see data sheets). I
made my own 8" seven segment display using over 200 leds but the way I have
the leds connected series/parallel, I am getting too close to the maximum
current. One of these days I will either build a driver board for the 7219
or use one of the more powerful driver chips out there. Several people
have talked about this before, do a search for MAX7219 inside of this yahoo
group. Good luck, keep us informed, Dan
No, not a solid matrix stretching 3' x 3' but 8 rows and 8
columnsstretched out 3' x 3', or a total of up to 64 discrete LEDs.
Silas
Thanks for the feedback. Can I ask just one question? Since I
am new to programming in PBasic, how can you send out serial
data to test the matrix. I have a test board for 5 columns by 8
rows wired up, but I want to test it out before trying to get it to
communicate with a Mac program called Max/MSP. The debug
window makes no sense to me on how to send out data. Any
help would be greatly appreciated
Silas
--- In basicstamps@yahoogroups.com,
daniel.d.dangremond@j... wrote:
> Silas,
> The MAX7219 is easy to interface with. Just follow the
examples on
> Parallax's website and in the NutsandVolts magazine articles
(also on the
> web). The only thing I had trouble with is being very careful to
not
> exceed the voltage and current maximum's on the 7219 (see
data sheets). I
> made my own 8" seven segment display using over 200 leds
but the way I have
> the leds connected series/parallel, I am getting too close to the
maximum
> current. One of these days I will either build a driver board for
the 7219
> or use one of the more powerful driver chips out there. Several
people
> have talked about this before, do a search for MAX7219 inside
of this yahoo
> group. Good luck, keep us informed, Dan
>
>
>
>
>
> No, not a solid matrix stretching 3' x 3' but 8 rows and 8
> columnsstretched out 3' x 3', or a total of up to 64 discrete
LEDs.
>
> Silas
DEBUGIN function to get data from the DEBUG window (previously, you had to
use SERIN setup at 9600 baud).
DEBUGIN DEC cmd
will accept a decimal number. Now you can send it to the 7219:
SHIFTOUT Dpin, Cpin, MSBFirst, [noparse][[/noparse]cmd]
Since you're new to PBASIC you may want to download and skim through
StampWorks or any of our other educational books. StampWorks includes an
experiment with the MAX7219.
-- Jon Williams
-- Parallax
In a message dated 3/13/2003 8:29:14 AM Central Standard Time,
sistarr@h... writes:
> Dan,
>
> Thanks for the feedback. Can I ask just one question? Since I
> am new to programming in PBasic, how can you send out serial
> data to test the matrix. I have a test board for 5 columns by 8
> rows wired up, but I want to test it out before trying to get it to
> communicate with a Mac program called Max/MSP. The debug
> window makes no sense to me on how to send out data. Any
> help would be greatly appreciated
Silas
[noparse][[/noparse]Non-text portions of this message have been removed]
' Set means Invert sense (ie 232 drivers in use)
SerBaud CON 84 + SerInvert ' "84" 9600 baud from SEROUT Baud Rates
ReadByte VAR Byte
SEROUT 16, SerBaud, [noparse][[/noparse]"Enter a Value>"]
SERIN 16, SerBaud, [noparse][[/noparse]ReadByte]
' "16" means use Stamp debug port for I/O
-- In basicstamps@yahoogroups.com, jonwms@a... wrote:
> If you've downloaded the Beta version of the new compiler you can
use the
> DEBUGIN function to get data from the DEBUG window (previously, you
had to
> use SERIN setup at 9600 baud).
>
> DEBUGIN DEC cmd
>
> will accept a decimal number. Now you can send it to the 7219:
>
> SHIFTOUT Dpin, Cpin, MSBFirst, [noparse][[/noparse]cmd]
>
> Since you're new to PBASIC you may want to download and skim
through
> StampWorks or any of our other educational books. StampWorks
includes an
> experiment with the MAX7219.
>
> -- Jon Williams
> -- Parallax
>
>
> In a message dated 3/13/2003 8:29:14 AM Central Standard Time,
> sistarr@h... writes:
>
> > Dan,
> >
> > Thanks for the feedback. Can I ask just one question? Since I
> > am new to programming in PBasic, how can you send out serial
> > data to test the matrix. I have a test board for 5 columns by 8
> > rows wired up, but I want to test it out before trying to get it
to
> > communicate with a Mac program called Max/MSP. The debug
> > window makes no sense to me on how to send out data. Any
> > help would be greatly appreciated
Silas
>
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]