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Lesson 25: HT16K33 4 digit display | Arduino Step by Step Course

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Please download required files for this code

Part 2: LCD, LED and OLED Screens

In this lecture we learn how to use HT16K33 4 digit display with Arduino. This is the king of all displays. you can use and display in unlimited possible way including integer like 245 or decimal value such as 25.6 or hex value such as FAB1.


  /*
 * Robojax Arduino Step By Step Course
 * Lesson 25 HT16K33 4 digits seven segment display 
 
 * This is Arduino code for HT16K33 4 digits seven segment display using with Arduino
 * This is to show full featues of HT16K33 in one sketch shown in video https://youtu.be/tEwWsbHQA5Q
 * 
 * Original code and library by Rob Tillaart https://github.com/RobTillaart/HT16K33
 * 
 * Written by Ahmad Shamshiri for Robojax Robojax.com
 * on Jan 15, 2021  in Ajax, Ontario, Canada
 
   Please watch video instruction here https://youtu.be/UZTAV2sRi9w
 This code is available at http://robojax.com/course1/?vid=lecture11
 
with over 100 lectures Free On  YouTube Watch it here http://robojax.com/L/?id=338
Get the code for the course: http://robojax.com/L/?id=339 
* 
 * Code is available at http://robojax.com/learn/arduino

 * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
 * This code has been download from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>. 

*/
//  AUTHOR: Rob Tillaart
// VERSION: 0.1.0
// PURPOSE: demo
//     URL: http://www.adafruit.com/products/1002
//     URL: https://github.com/RobTillaart/HT16K33

// connect potmeter or so to A0 and A1 for the VU tests

#include "HT16K33.h"

HT16K33  seg(0x70);
uint32_t start, stop;
uint8_t  ar[4];

void setup()
{
  Serial.begin(115200);
  Serial.println(__FILE__);

  seg.begin();
  Wire.setClock(100000);

  seg.displayOn();


  seg.setDigits(4);
  Serial.println("displayTest()");
  seg.displayTest(1);
  seg.displayOff();
  delay(1000);
  seg.displayOn();
  seg.displayColon(false);
}

void loop()
{

   seg.setDigits(1); 
   seg.displayInt(64);
   delay(5000);   

   seg.setDigits(4); 
   seg.displayInt(64);
   delay(5000);         

   seg.setDigits(1); 
   seg.displayInt(-74);
   delay(5000);

   
     
  seg.displayFloat(33.5, 1);
  delay(3000);

  seg.displayFloat(3.5, 3);
  delay(3000);

  seg.displayFloat(-12.6, 3);
  delay(3000);
  
  seg.displayFloat(333.6, 1);
  delay(3000);  

   seg.displayOff();
  delay(1000);
  seg.displayOn();     
 seg.setDigits(2);
   seg.displayFloat(-1.6, 1);
  delay(3000);    

    seg.displayTime(18, 25);
    seg.displayColon(1);
    delay(3000);
     seg.displayColon(0);
     
  seg.setDigits(1);
  for (int16_t counter = -300; counter < 300; counter += 7)
  {
    seg.displayInt(counter);
    delay(100);
  }

  seg.displayHex(0xABCF);
  delay(3000);

  for (int i = 15; i >= 0; i--)
  {
    seg.displayHex(0xABC0 + i);
    seg.brightness(i);
    delay(500);
  }
      seg.brightness(15);    
}

   

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