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Thanks Malcolm for noticing this bug! I used the same sketch for another project with multiple matrices and I forgot to set NBR_MTX back to "1". Anyway, since the code only references one matrix (the one with index "0") the sketch is still working without any problem.
There is a link in step 2 to compressed files in zip and rar format.
I am not sure what you mean by "scroll horizontally". The current library can drive up to 8 matrices (8x8 leds each) with a basic/coarse scroll. If you want another type of scroll, the library or the sketch will require to be updated.
I have used it with an Arduino ProMini so a ProMicro should also be ok. The pins in the instructable are defined as: LED Matrix Arduino Colour of wire in picture VCC 5V Red GND GND Black DIN D12 Yellow CS D10 White CLK D11  ...
I have used it with an Arduino ProMini so a ProMicro should also be ok. The pins in the instructable are defined as: LED Matrix Arduino Colour of wire in picture VCC 5V Red GND GND Black DIN D12 Yellow CS D10 White CLK D11 Blue You can remap them for your ProMicro by updating their values in the following line of the sketch: LedControl lc=LedControl(12,11,10, NBR_MTX);
Thanks for the link!
Code and explanation is available in Step 2
Great! Thanks for sharing the result :)
I am not sure if I understand what you mean by "changing the direction of the words"The current code starts displaying the first character on the right-most matrix (index 0) and then it scrols the text moving to the left.This means that your matrices are aligned with matrix 0 on the right and matrix 3 on the right and the text scrolls right to leftTo achieve the effect of the text entering through the left-most matrix and scrolling left to right, you should change the code. Alternatively you can:- reorder physically the matrices: make matrxi index 0 the left-most and matrix 3 the right-most.- reverse the order of the string you want to write (e.g. "DLROW OLLEH" instead of "HELLO WORLD"
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