Multi Function Led
Display
Introduction
Software
Hardware
Schemes
Display Led Modes
-Binary
Time Mode
-Bar
Memory Status Mode
-Bar HDD Status Mode
Introduction
A Multifunction Led Display is the easiest way
to create your own information system display .This display is a kind
of
colored LEDs controller through the parallel port using a very, really
very easy scheme.
Software
The software is a Perl script under GNU(GLP) license and works only under
GNU with Linux .This version display 3 system views
modes: a Binary Clock (Only for Geeks), a Memory Status Bar and HDD
Status Bar, the script have a auto mode to change the system
views (10 seconds Binary Clock,4 seconds Memory Status Bar and 4
seconds
HDD Status Bar).
Download SystemLed.v.0.3.pl
connect your Multifunction Led Display and just type
./SystemLed.v.0.3.pl to run it.
Usually SystemLed.v.0.3.pl requires a Driver::ParallelPort Cpan Perl driver, you can found it at:
http://freshmeat.net/projects/parport/
http://search.cpan.org/~scott/
Files:
Device-ParallelPort-1.00
Parallel Port Driver for Perl
Device-ParallelPort-drv-linux-1.00 Standard linux
hardware io access
Device-ParallelPort-drv-parport-1.0 Linux Kernel
2.2+ parport /dev/parport
or also
http://rpmpan.sourceforge.net/Device.html
Device::ParallelPort
perl-Device-ParallelPort-1.00-8.noarch.rpm
Device::ParallelPort::drv::linux
perl-Device-ParallelPort-drv-linux-1.00-8.i386.rpm
Hardware
Hardware you need is only a:
Wires
6 Red Led
2 Green Led
2 Yellow Led
1 Orange Led
1 10K ohm Resistor
1 DB25 male (This is a printer connector)
Not any more.
Schemes
The next pictures are the Hardware schematics ,
the
number is the PARALLEL PORT CONNECTOR number PIN and the Led color
is the correct position for each color LED , Remember use a resistor
to avoid Parallel port damages.
Also remember , The Sorgonet Team are not responsible
for
possible damages you can cause.
Display Led Modes
The software provides 3 Display or views modes,
and change automatically this modes, The initial mode is a Binary
Hour mode and the default time is for a 10 seconds, the next is a Bar
Memory Status Mode and
display it for a 4 seconds and the last mode for a 4 seconds more is a
Bar HDD Status Mode.
Feel free to change ,improve ,delete etc.. display times or mode
Binary Hour Mode
Binary Hour Mode display a
binary hour ,minutes and seconds (ON/OFF) . You are in this mode when
ORANGE LED turns ON/OFF every second
The upper RED LED is a HOUR number, and have these values for led
position (8,4,2,1) to get the hour add the ON leds values ,the down
leds line
is a MINUTES and have (32,16,8,4,2,1) values for led position, add the
ON leds values to get the Minute.
|
|
Bar
Memory Status Mode
Bar Memory Status Mode Display a
Full/Free memory system using the bottom leds lines like a percentile %
Bar., You
are watching this mode if the ORANGE LED is ALWAYS ON, and the UPPER
RED
LED position value 8 is ALSO ON, For each LED ON in BOTTOM line,
that means you are using a
17% of total memory .
Bar HDD Status Mode
Bar HDD Status Mode display a Full/Free
HDD space, using the down line like % Bar.You are in this mode if
ORANGE LED is ALWAYS ON and
the UPPER RED LED position value 4 is ALSO ON.For
each LED ON in DOWN line you have 17% FULL of total hdd space.
