Chao at 08:36, 11 October 2022

2022-10-11T08:36:34Z

New page

== Chained Dot Matrix Display Parola ==

=== Installation Steps (Simple)===
* Take 3-set matrix display for example
{| class="wikitable sortable"
|-
! Steps !! Direction Image !! Note
|-
| Soldering dot matrix to board directly || [[File:Parola setup 1.jpg|150px]] || all silk print and dot on matrix should on same side of P1, brightness
|-
| Detailed look, all the accessories are not very necessary || [[File:Parola setup 1a.jpg|150px]] || please double check direction
|-
| Soldering a bended pin header on the end of back side || [[File:Parola setup 2.jpg|150px]] || on the another side of silk print, on right side if see front
|-
| Done || [[File:Parola setup 3.jpg|150px]] || how it looks
|-
| Test with arduino || [[File:Parola setup 4.jpg|150px]] || MAX72_xx library
|}
=== Soldering Step by Step (Complex)===

{| class="wikitable sortable"
|-
! Step !! Note !! Header text
|-
| 1 || Soldering 4 pcs of 2x5 pin header of the back side of PCB || carefully do not block the pin holes of the dot matrix during soldering, since they are very close, prepare desoldering tool in case
|-
| 2 (optional) || Soldering the dot matrix socket pin header 1x8 || This is optional, if you prefer a slim display chain, and no need to remove the dot matrix anymore
|-
| 3 || place dot matrix on the socket, or soldering directly on board || be VERY carefully if you solder it directly on board, the direction of the dot matrix should not be wrong , otherwise it will be useless board
|-
| 4 || Add jumpers on 2x5 pin headers, add signal or right of your chain display, should work now! || try with MAX_72XX -> test sketch in arduino
|}
* The dot matrix has a "dot" or print words on the side of its left, "the left side of the IC"
* The right angle pin header should be soldered on the right, "the right side of the IC"
[[File:Dot matrix direction.jpg|thumbnail]]

=== Software ===
* use library and demo code from here: https://github.com/Edragon/Arduino-main/tree/master/libraries/MD_MAX72XX

''' Wiring '''
* Connect to the right side pins of matrix (design error, both side marked with DOUT, but right side (when you face to the matrix) should be DIN)
* Find follwing part and setup in Arduino, max72xx test sketch:
#define MAX_DEVICES 5 // how many you chained
#define CLK_PIN 13 // or SCK - CLK
#define DATA_PIN 11 // or MOSI - DIN
#define CS_PIN 10 // or SS - LD (load)

== Library and Demo code ==
* Tested on arduino IDE version 1.67
* Download MAX_72XX and true random library from our dropbox page or [https://github.com/mariusrugan/MD_MAX72XX github here] and [https://code.google.com/archive/p/tinkerit/wikis/TrueRandom.wiki true random] here.
* Now you can run Max_72xx_text example to test it.
* [https://parola.codeplex.com/ Then find the parola demo code here.] or from our dropbox page.

''' Documents '''
* [http://forum.arduino.cc/index.php?topic=171056.0 Arduino forum discussion here.]

''' Demo video '''
* [https://www.youtube.com/watch?v=0ZJSnulKp58 Demo Video 1] based on parola example
* [https://www.youtube.com/watch?v=aMbxpv6vCoI Demo Video 2 based on library max_72xx_test example]
* [https://www.youtube.com/watch?v=1UoPPtZksvk Color Dot Matrix]

[[category: Dot Matrix]]

Parola - Revision history

Chao at 08:36, 11 October 2022