Arduino Tutorial #21 - MAX7219 LED Matrix Display Walkthrough & Test Code - Scrolling Text Code
ฝัง
- เผยแพร่เมื่อ 11 มิ.ย. 2017
- Today we are playing with the MAX7219 Driven Dot LED Matrix display. I was extremely surprised by how simple it was to get this running through the use of two libraries covered in the video.
We go through the multiple test examples which allow you to display text, variables, scrolling text and much more.
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Relevant Materials:
Library: parola.codeplex.com/
Tutorial & Software: eeenthusiast.com/max7219-led-m...
Hardware Used:
Arduino Uno - Product Link: amzn.to/2qPA2VY
Breadboard - Product Link: amzn.to/2qqpwmX
Jumper Cables - Product Link: amzn.to/2pIBcSV
Dot Matrix Module: - Product Link: amzn.to/2r3r5E6
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arduino max7219, arduino max7219 tutorial, arduino max7219 scrolling text code, marquee, arduino matrix, arduino led cube, arduino display tutorial, arduino led blink, arduino max7219 7 segment, EEEnthusiast, Vlad Romanov, Volodymyr Romanov
Great timing! I have one of these showing up tomorrow for a project and really had no idea where to start. Thanks so much!
I had some problems with some cheap chinese matrises, and after watching this video and changing the hardware, all those problems are gone. Thank you very much for your time and explanation.
good video, direct and to the point. Thanks.
Great! I was holding a MAX7219 to use in a project. But i was not getting how to do it. And you explained perfectly. Thanks.
Superb. Thanks for taking the time. Do you know of a source for smaller 8x8 matrix displays? The ones here (I have these already) are too large for my desired enclosure. Smaller "dots" would be necessary but I haven't seen them. Thanks.
thank you for sharing,... cheers!
What screen recording/editing software did you use to make this tutorial?
cool project will try it out
Is there a way to chain the matrices vertically as well to form a bigger display? ( say i want to connect a 5 rows x 10 columns of those display modules for example, is that possible)?
Thank you for this video...
Well done, getting ready to try my hand with a longer matrix, maybe 20-24 digits long with ESP8266 to pick up messages. Love your delivery. Keep broadcasting!!
Quick question... I want to connect 4 of the matrix modules together. But I think power will be an issue. What is the best way to power the entire set?
Version 3.0( of the MD_MAX72xx lib) has hardware select in the Arduino Sketch. So you don't need to edit the header file any more. For example, Open Parola_Scrolling --> look for line of code(line 43 or so) #define Hardware_type MC_Max72xx::Parola_HW --> change Parola_HW to FC16_HW.( cheap aliexpress version 1088AS) or change to whatever hardware version you have.
Oooh, and suddenly the text displays non-inverted! Thanks a bunch!
Brilliant. Many thanks. I've spent a long time to try and sort this out. Now it's working.
Hlo Dave, can u explain how to i can edit the library. bcouse i dont find the lib installed in my arduino software. i opend parola_scrolling, but in the Sketch there is no lin : #define Hardware_type MC_Max72xx. How i can change or ad the specific .h file? thanks in advance, Peter
@@malcolmpalmer2437 can you send code.....
Can you send code anyone please help me...i dont understand the codeerror
Your Video save me of cutting matrix. Thanks man!
You're awesome!!!!
hi!
thanks a lot
i have a question please:
how is it possible to create animations with a 32x32?
what is the program you opened at 2:30?
Great video!
however, I got a simple question: How I can display static text without flashing bespoke bitmap?
Sir, i want to ask when we connect this led matrix to arduino and then we connect them both with PC to upload program, does the matrix LED turns on automatically or not. In my case, when I'm connecting both the module with PC, some part of the LED turns on and some are off. This is my first project and i have very basic knowledge about electronic and nil about coding.
I get something on the display, but it is backwards I used fc16 in the header
amazon Cylewet MAX7219 Dot Matrix Module 4
Got it to work. I had changed the wrong file.
How do you know which MAX7219 you have? I am not sure how to figure this out.
It is very nice tutorial.
I heard you once saying you like to look for the problems which people faced it, here is one. I want to control of 3 axis Z,X AND Y . I want to keep it stable all of the time, means when the of the x,z and y change of data the motor or servo of the axis works to back stable again with other Axis while the other motors or servos of other axis be calm.
Hi M. Samaha, That's an interesting application. Have you started working on it? I'm assuming you'd need an accelerometer/gyro in order to detect the real positioning and adjust the motors to the target based on the feedback loop. I'd gladly help you further if you want to message me more details about the project.
Yes, I need your help.
I want to make stabilize for the x and y and z which mean when the sensor detect change on any axis , then give power to the axis which has change to keep the axis stable all of the time.
I would like to do it with servos. Contact me on my email mossad.samaha@gmail.com
I found Arduino 9 Axes Motion Shield, Does it fit? Or you suggest use gyro "10-DOF IMU Breakout - L3GD20 + LSM303 + BMP180" both of it has 9 Axes. I am glad to work together on it.
I have back to front text and can see potential solutions, but I cannot find any way to open the MD_MAX72xx file to find the line to edit
good explanation of using the matrix.Wondoring why print 98761, the display only display 9876 and the 1 went missing. ?.
how can i make a scrolling text display? i make a 7219 display using md parola library, my text are showing invert, how to streight that text, please help me
Can I have 20nos. Of 8x8 LED Matrix module. Can support tri-color display?
can you run 2 of these on one board? I need 500 individual leds
Enjoyed the tutorial. One question... How do you open the header file to tell the sketch which board I have?? Thanks!
Thank you for the kind comment. On a mac, you need to go into your Applications folder and locate the specific library. Inside of the library you will have to edit the header file; I used Xcode which was the default on my machine. On a Windows machine, you should be able to find the same in the Arduino/libraries/"any library" directory. Once there, just open the file in Notepad or any other editor and make the changes.
EEEnthusiast, I finally figured it out! Thank you again for the help and I now need to get more modules to hook together!!
nice
How do you make text scroll at certain time only?
Could u add a DS3231 and add clock with the custom message
SIR i am connected to 32*8 led matrix,but its runs rivarce ,plz tell me how it will be correct
hi sir
i want to make a program like this but i don't know the lunguage of the arduino i will explain the function of the program i wnt to make two diffrent text the first text is alwyas shown "wlcome " and the second text will be shown after i press a button plz help me and thnx
how exactly do i open the header file?
Do I need one MAX7219 with each 8x8 matrix? f0_o
Open the header file of the library itself. (what is its name) What is the name of the (library itself) and where would one find this. Open some header file in some library itself is a little vague.
can be use unicode font?
Can I send my sensor data on the display
how to add 10 nos MAX7219 at the same time display of 4 lines
Can u please give me the code to display serial monitor data in max7219 led matrix...
dear we need 24x64 led matrix using max7219 code ?
plz help me
Hlo, at video point 2;29 u opened an editor to open library.. how u do that?
in windows libraries are saved in documents / arduino folder. go there and open with a text editor the fileyouwant.h
i manage to get goying text scrol on unoand 72max.that was only once .that also mirro.but itryed to change the nscrol after that now icannot do that.some one can help me.
¿puedes activar subtítulos en español?, por favor.
Found the .h file and it is not like the one in the video. Seems you don't have to make the change anymore with the newer .h file. But all I got was every dot on the display was on. Maybe it don'w work on the Mega 2560
Version 3.0( of the MD_MAX72xx lib) has hardware select in the Arduino Sketch. So you don't need to edit the header file any more. For example, find
#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW in the code and change this PAROLA_HW to FC16_HW or ICSTATION_HW or GENERIC_HW, it depends of your hardware and one will work
hi anyone knows of a file that allow simplified chinese character in arduino uno. For now i've only seen the ones for LCD. It'll be a great help if anyone could help out
Give me specifications of SMPs
I don't understand where you got the header library from :(
Dave Cleand explained in his comment
OK thanks, but we don't need the lecture at the beginning extolling the value of Arduino and open source. You mention it at the end, and that's sufficient. Thanks for the video.
But where it really counts: showing us where to change for my particular hardware (header file), he glosses over and pops up a screen out of nowhere ....aaaand figure it out for yourself. Useless.
how to control 32x16 led matrix
Using those libraries is easy. But how to drive the matrix from scratch?
help you about it th-cam.com/video/-l3_-eOtcnM/w-d-xo.html
I didn't get the same library as your it didn't showed #define use_parola_hw
Dave Cleand explained in the comment
I am trying to understand why mine is inverted all the text is back to front
please give a feeback here.. were same
@glynn mason.. the problem has solve. you must install the MD_patrola with the version of 2.6.4 and the MD_MAX72xx version 2.6.0 that's the problem i've fix earlier..
The solution posted by Dave Cleland solved it for me. Basically change #define Hardware_type MC_Max72xx::Parola_HW to #define Hardware_type MC_Max72xx::FC16_HW to tell the library what hardware you have (I guess).
Sir how to control speed of scrolling text.
find "uint8_t scrollSpeed = 25;" line in the code and change this value to higher to slow down scrolling or lower to speed it up.
all my texts are sideways and scroll in reverse order ????
I want to scroll words from right to left but its as if I have them connected wrong (but I don't cause its a 4 piece premade in order and connected lol)
why dont you give wiring ? thank you
please help me I'm looking for two months how to do And I still can not do it while I try a lot of stuff please is someone can help me
this link can hep your problem th-cam.com/video/-l3_-eOtcnM/w-d-xo.html
please early replay
please write a program charecter name (Rambo)
Code