I am stuck in library ledcontrol.I dow't want to use MD_library and stuff.I tried to increase the number of led matrix from 4 to 8 but this is what I got
It should display 12:16:20
Please check the pinout for the led matrix. You haven't provided a model number or link for the LED matrix....
My first check would be the wiring between the matrix's.
e.g. the wiring in your picture is straight 1:1. This is probably OK for power and gnd, but maybe the signal wiring needs looking at?
The shift register chips for every matrix element has a data in and data out. Make sure sure "data out" from module 1 is connected to "data in" on the second.
Then swap the matrix to make sure the second one actually works
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If I copy code of ready library ,what I will learn so ?
Both matrix work well but if I put them together as I did with that code ,a problem of orientation come up
I changed wire and this is what I got
So it was a dud wire to start with. OK, so you say
Does that mean that if you put the left hand matrix in place of the right, it works exactly the same (with of course, the same code running) as the one on the right?
If so there clearly is something wrong with your code.
My supervisor teacher proposed to me Led 32*8 matrix scrolling text display with control via bluetooth to be my graduation project and i found this code the most appropriate one for programming my nano arduino but unfortunately , i didn't understand it espacially the part of buffer
TheMemberFormerlyKnownAsAWOL:
Put that code in the bin; it's junk; way too much code.
Besides that, if this is YOUR graduation project, shouldn't it be an original work? You should be writing your own code rather than trying to "find" it on the internet.