Arduino : Potentio Indicator Uses Led Matrix MAX7219

In the previous tutorial I've made a potentiometer indication using the RGB ring neo pixels led. you can see it in this article "Potentio Indicator Uses RGB Neopixel"

And today I will show the potentiator indicator using the MAX7219 led metric display.

Follow the steps below to make it.

Step 1: Required Components

Required Components :

Arduino nano
Potentiometer
Max7219 Led Matrix Display
Jumper Wire
Project Board
USB mini
laptop

Required Library

LedControl

Step 2: Scheme

To assemble the components see the schematic drawing above, you can also see the information below:

Arduino to Led & potentio

+5V ==> VCC & 3.Potentio

GND ==> GND & 1.Potentio

D6 ==> DataIn

D7 ==> CLK

D8 ==> CS / Load

Step 3: Programming

Use the code below to make ait:

#include "LedControl.h"
/*
 Now we need a LedControl to work with.
 ***** These pin numbers will probably not work with your hardware *****
 pin 6 is connected to the DataIn 
 pin 7 is connected to the CLK 
 pin 8 is connected to LOAD 
 We have only a single MAX72XX.
 */
 LedControl lc=LedControl(6,7,8,1);
 unsigned long delaytime=100;
 void setup() {
   lc.shutdown(0,false);
   lc.setIntensity(0,8);
   lc.clearDisplay(0);
}
void loop() 
{
   int val = analogRead(A0);
   val = map(val, 0, 1023, 0, 8);
  if(val == 1)
  {
    lc.setRow(0,0,B10000000);
 
  }
  if(val == 2)
  {
     
     lc.setRow(0,0,B10000000);
     lc.setRow(0,1,B10000000);
  }
  if(val == 3)
  {
     lc.setRow(0,0,B10000000);
     lc.setRow(0,1,B10000000);
     lc.setRow(0,2,B10000000);
  }
  if(val == 4)
  {
      lc.setRow(0,0,B10000000);
      lc.setRow(0,1,B10000000);
      lc.setRow(0,2,B10000000);
      lc.setRow(0,3,B10000000);
  }
  if(val == 5)
  {
      lc.setRow(0,0,B10000000);
      lc.setRow(0,1,B10000000);
      lc.setRow(0,2,B10000000);
      lc.setRow(0,3,B10000000);
      lc.setRow(0,4,B10000000);
  }
  if(val == 6)
  {
      lc.setRow(0,0,B10000000);
      lc.setRow(0,1,B10000000);
      lc.setRow(0,2,B10000000);
      lc.setRow(0,3,B10000000);
      lc.setRow(0,4,B10000000);
      lc.setRow(0,5,B10000000);
    
  }
  if(val == 7)
  {
          lc.setRow(0,0,B10000000);
        lc.setRow(0,1,B10000000);
      lc.setRow(0,2,B10000000);
      lc.setRow(0,3,B10000000);
      lc.setRow(0,4,B10000000);
      lc.setRow(0,5,B10000000);
      lc.setRow(0,6,B10000000);
  }
  if(val == 8)
  {
          lc.setRow(0,0,B10000000);
     lc.setRow(0,1,B10000000);
      lc.setRow(0,2,B10000000);
      lc.setRow(0,3,B10000000);
      lc.setRow(0,4,B10000000);
      lc.setRow(0,5,B10000000);
      lc.setRow(0,6,B10000000);
      lc.setRow(0,7,B10000000);
  }
  lc.clearDisplay(0);
}