Lesson 110: Build up to 8 digits Seven Segment display using 74HC595 Shift Register | Robojax

Lesson 110: Build up to 8 digits Seven Segment display using 74HC595 Shift Register | Robojax

Please select other codes for this lecture from the links below.

Related or required files and link to this lesson

• SunFounder 745H595 LED project
• Basic Walking LED using 74HC595 (YouTube video)
• Using Seven Segment without any chip with Arduino (YouTube video)
• Build Digital Clock with Seven Segment Display (YouTube video)
• نسخۀ فارسی این ویدیو
• Purchase Authentic Arduino UNO Amazon USA
• Purchase Authentic Arduino UNO Amazon Canada
• Purchase Authentic Arduino from all other Amazon

LED Seven Segment Display using 74HC595

This vode is to introduct the 74HC595 to driver 8 LED lights and turn them ON from 0 to 8 one by one while keeping each LED ON.

Projects in this video using 74HC595

• Project 1: Basic Shifting LED lights
• Project 2: Single Digit Seven Segment at 6:29 of video
• Project 3: Two digits dispaly at 15:28 of this video
• Project 4: Up to 8 Digits display is explaiend at 31:47
• Project 5: Adjusting delay of each digits using potentiometer at 57:32
• Project 6: Measuring DC voltage and dispalying on the LCD at 1:00:41

In Project 2: Single Digit Seven Segment Now we learn how a single digit display works. Please use the provided code below.

Timing of chapters in the video

 /*
Build up to 8 digits Seven Segment display using 74HC595 Shift Register 
Watch full video instruction on YouTube https://youtu.be/xhPXovgFhso
written and explained by Ahmad Shamshiri on https://youtube.com/@robojax

*/
/*
file:  Lesson_74HC595_1_SevenSegment
This is part of the code to learn how to run multiple seven segment displays using
74HC595 shift register IC.

Mar 16, 2024

*/
const int CLOCK_SHCP_PIN11 = 12;//SHcp pin of 74HC595 
const int CLATCH_STCP_PIN12 = 11;//STcp pin of 74HC595 
const int DATA_DS_PIN14 = 10;//ds pin of 74HC595 

byte digits[] =   {B00111111, //0
                   B00000110, //1
                   B01011011, //2
                   B01001111, //3
                   B01100110, //4
                   B01101101, //5
                   B01111101, //6
                   B10000111, //7
                   B01111111, //8
                   B01101111  //9
                  };

void setup ()
{
  //set pins to output
  pinMode(CLATCH_STCP_PIN12,OUTPUT);
  pinMode(CLOCK_SHCP_PIN11 ,OUTPUT);
  pinMode(DATA_DS_PIN14,OUTPUT);
}
void loop()
{
  for(int num = 0; num <=8; num++)
  {
    digitalWrite(CLATCH_STCP_PIN12,LOW); //ground ST_CP and hold low for as long as you are transmitting
    shiftOut(DATA_DS_PIN14,CLOCK_SHCP_PIN11 ,MSBFIRST,digits[num]);
    //return the latch pin high to signal chip that it 
    //no longer needs to listen for information
    digitalWrite(CLATCH_STCP_PIN12,HIGH); //pull the ST_CPST_CP to save the data
    delay(2000); //wait for a second
  }
}