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31  Using Arduino / LEDs and Multiplexing / Re: Getting 3 LED loops to run "simultaneously" help please on: May 25, 2014, 08:52:53 pm
I have a sketch call Multiblink that allows you to set up this sort of stuff just by changing data tables in the code. See the code repository link below if you are interested.
32  Using Arduino / Programming Questions / Re: Program does not go into the switch statements at all ! on: May 22, 2014, 09:42:15 pm
A character is either going to be equal to comma or not. The first and second if statements take care of all possibilities (== and !=) if you just compare to comma, so the last else part never gets executed.

Are you sure you need the last else statement? Should this just be outside the if/else?
33  Using Arduino / Sensors / Re: Issues with recently purchased LM35D on: May 19, 2014, 07:58:27 pm
You should be posting code and circuit diagrams to help us. Circuit is especially import in this case, especially if you have long wires to the sensor.

The sensor is very sensitive to the voltage calibration. I have a library that uses the internal voltage reference to calibrate the sensor voltage. See the link to the repository below, in the signature block.
34  Community / Exhibition / Gallery / Re: Scrolling LED matrix display - Parola for Arduino on: May 17, 2014, 04:17:08 pm
Font can easily be rotated. Use Font builder for that.

The shift functions can be changed. There is a table in the source code that maps the request for a shift to an actual shift. Hardware remapping selects a different shift depending on the configuration. Have a go at that if your feel like it. At the moment I don't have time to go back to these libraries to make major changes.
35  Community / Exhibition / Gallery / Re: Scrolling LED matrix display - Parola for Arduino on: May 16, 2014, 11:27:17 pm
DIn on the right side is good because the module on the right is module 0.

I am not clear what hardware you have selected in the scrolling video. Is it the generic module?

In the hardware test video, your columns are scanning from left to right (ie, col 0 is on the left), so that needs to be reversed with REV_COLS=1. Your rows are scanning from top to bottom, so the rows do not need to be reversed (REV_ROWS=0). I really can't see why that would not work...

36  Using Arduino / General Electronics / Re: decreasing keypad pins on: May 16, 2014, 11:04:11 pm
Lots of keys (100 or more) using 3 pins http://forum.arduino.cc/index.php?topic=235438.0

This is the probably same or similar as the 4017 mentioned above.
37  Community / Exhibition / Gallery / Re: Scrolling LED matrix display - Parola for Arduino on: May 16, 2014, 03:18:16 pm
If understand you correctly the mapping you see , as-is
Code:
 D0 D1 D2 D3 D4 D5 D6 D7
G
F
E
D
C
B
A
DP


This is probably configured as HW_DIG_ROWS=0, HW_REV_COLS=1, HW_REV_ROWS=0. This looks like generic hardware config.

The modules upside down
Code:
 D7 D6 D5 D4 D3 D2 D1 D0
DP
A
B
C
D
E
F
G
This I think is HW_DIG_ROWS=0, HW_REV_COLS=0, HW_REV_ROWS=0.

Neither combination has been tested and probably won't work without some debugging.

Note: Late edit due to error in the explanation.
38  Community / Exhibition / Gallery / Re: Scrolling LED matrix display - Parola for Arduino on: May 15, 2014, 06:32:39 am
Sure, and which LEDs are on when it says that? The point of the test program it to turn on the led and tell you which row/column you are looking at.
39  Community / Exhibition / Gallery / Re: Scrolling LED matrix display - Parola for Arduino on: May 14, 2014, 09:43:10 pm
It is a test program in the MD_72xx examples.

There is a library that you do not have in the Parola test example. That is documented in the code file. You need to read these and not just load and compile.
40  Community / Exhibition / Gallery / Re: Scrolling LED matrix display - Parola for Arduino on: May 14, 2014, 09:37:19 pm
What does the matrix testing demo show?
41  Community / Exhibition / Gallery / Re: Scrolling LED matrix display - Parola for Arduino on: May 14, 2014, 09:01:59 pm
The USE_*_HW defines ultimately are controlling how the libraries behave on a L-R and Top-Bottom. The translation is done in the _lib.h header file. There is a hardware test example that allows you to see which way the matrix is wired so that you can set up the appropriate mapping in the software header file.
42  Community / Exhibition / Gallery / Re: Scrolling LED matrix display - Parola for Arduino on: May 14, 2014, 03:29:04 pm
There are only 2 latest versions in the download sections. So installing those versions should be correct.

The libraries have changed in the latest versions. You need to read the documentation that comes with the libraries as this will be more up to date than the forum discussions.
43  Community / Exhibition / Gallery / Re: Scrolling LED matrix display - Parola for Arduino on: May 13, 2014, 11:04:26 pm
Make sure that you are using a consistent set of libraries with the examples code. Download all the latest and then try again.
44  Using Arduino / Programming Questions / Re: NFC and keypad on: May 07, 2014, 10:21:01 pm
Posting your code and circuit would be a good start to getting help.
45  Using Arduino / General Electronics / Re: led matrix and arduino on: May 07, 2014, 04:59:56 pm
This thread is probably discussing the same type of hardware
http://forum.arduino.cc/index.php?topic=222334.0
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