Multiplexage 74HC95

7-Segment-Display-Arduino-Circuit

74HC595-Shift-Register

Vcc
Up to 6V (needs to be the same voltage as your microcontroller) – Usually 3.3 / 5v
QA to QH
Shift Register Outputs.
SER:
(Serial) Input for the next pin that gets shifted in.
SRCLK
(Serial Clock) When this pin is pulled high, it will shift the register.
RCLK
(Register Clock) Needs to be pulled high to set the output to the new shift register values, This must be pulled high directly after SRCLK has gone LOW again.
SRCLR
(Serial Clear) Will empty the whole Shift Register if pulled LOW, must be pulled High to enable.
OE
(Output Enable) This pin enables the output when tied to GND, & disabled when HIGH.

circuitDiag circuit_tyc-365gwb ledgraph ledgraph2

seg Afficheur_bb

Avec des résistances de 460 Ohms

Librairie :

https://github.com/Simsso/Shift-Register-74HC595-Arduino-Library

Pour modifier l’intensité lumineuse il suffit de relier la broche 13 du HC à une broche PWM de l’Arduino et faire varier la valeur de 0 à 255

pinMode(outputEnablePin, OUTPUT);

void setBrightness(byte brightness)

{ analogWrite(outputEnablePin, 255-brightness);}

https://learn.adafruit.com/adafruit-arduino-lesson-4-eight-leds/brightness-control

 //////////////  
 // Test d'un afficheur 7 segments à 4 chiffres  
 // Avec un interrupteur relié en PIN 22  
 ///////////////////////////////////////  
 #include <ShiftRegister74HC595.h>  
 const int SEG0 = 5;  
 const int SEG1 = 4;  
 const int SEG2 = 3;  
 const int SEG3 = 2;  
 const int numberOfShiftRegisters = 1; // number of shift registers attached in series  
 const int serialDataPin = 8; // DS  
 const int clockPin = 9; // SHCP  
 const int latchPin = 10; // STCP  
 ShiftRegister74HC595 sr (numberOfShiftRegisters, serialDataPin, clockPin, latchPin);  
 const int buttonPin = 22;   // the number of the pushbutton pin  
 int buttonState = 0, prevUpState = 0;  
 int nB = 0;  
 int tab[4];  
 //////////////////////////  
 void setup()  
 { Serial.begin(9600);  
  pinMode(SEG0, OUTPUT);  
  pinMode(SEG1, OUTPUT);  
  pinMode(SEG2, OUTPUT);  
  pinMode(SEG3, OUTPUT);  
  sr.setAllHigh(); // Eteinds all pins  
  // initialize the pushbutton pin as an input:  
  pinMode(buttonPin, INPUT);  
  Serial.println("Init...");  
 }  
 ///////////////  
 void loop() {  
  buttonState = digitalRead(buttonPin);  
  if (prevUpState != buttonState)       // has the state changed from  
  { // HIGH to LOW or vice versa  
   prevUpState = buttonState;  
   if (buttonState == HIGH)         // If the button was pressed  
   {  
    nB++;  
    tab[3] = nB % 10;  
    tab[2] = nB / 10;  
    tab[1] = nB / 100;  
    tab[0] = nB / 1000;  
    Serial.print("Nb=");  
    Serial.print(nB);  
    Serial.print(":");  
    Serial.print(tab[0]);  
    Serial.print(tab[1]);  
    Serial.print(tab[2]);  
    Serial.println(tab[3]);  
    //delay(50);  
   }  
  }  
  compte();  
 }  
 ///////////////  
 void compte()  
 {  
  for (int Digit = 1; Digit < 5; Digit++)  
  {  
   switch (Digit) {  
    case 1:  
     digitalWrite(SEG0, HIGH);  
     digitalWrite(SEG1, LOW);  
     digitalWrite(SEG2, LOW);  
     digitalWrite(SEG3, LOW);  
     Analyse(tab[0]);  
     break;  
    case 2:  
     digitalWrite(SEG0, LOW);  
     digitalWrite(SEG1, HIGH);  
     digitalWrite(SEG2, LOW);  
     digitalWrite(SEG3, LOW);  
     Analyse(tab[1]);  
     break;  
    case 3:  
     digitalWrite(SEG0, LOW);  
     digitalWrite(SEG1, LOW);  
     digitalWrite(SEG2, HIGH);  
     digitalWrite(SEG3, LOW);  
     Analyse(tab[2]);  
     break;  
    case 4:  
     digitalWrite(SEG0, LOW);  
     digitalWrite(SEG1, LOW);  
     digitalWrite(SEG2, LOW);  
     digitalWrite(SEG3, HIGH);  
     Analyse(tab[3]);  
     break;  
   }  
   delay(3);  
  }  
 }  
 void Analyse(int NbA) {  
  switch (NbA) {  
   case 1 :  
    un();  
    break;  
   case 2 :  
    deux();  
    break;  
   case 3 :  
    trois();  
    break;  
   case 4 :  
    quatre();  
    break;  
   case 5 :  
    cinq();  
    break;  
   case 6 :  
    six();  
    break;  
   case 7 :  
    sept();  
    break;  
   case 8 :  
    huit();  
    break;  
   case 9 :  
    neuf();  
    break;  
   default :  
    zero();  
    break;  
  }  
 }  
 ////////////  
 // LOW = Allumé  
 // HIGH = Eteinds  
 ///////////////  
 void un()  
 { sr.setAllHigh();  
  sr.set(0, HIGH);  
  sr.set(1, HIGH);  
  sr.set(2, LOW);  
  sr.set(3, LOW);  
  sr.set(4, HIGH);  
  sr.set(5, HIGH);  
  sr.set(6, HIGH);  
  sr.set(7, HIGH);  
 }  
 void deux()  
 { sr.setAllHigh();  
  sr.set(0, HIGH);  
  sr.set(1, LOW);  
  sr.set(2, LOW);  
  sr.set(3, HIGH);  
  sr.set(4, LOW);  
  sr.set(5, LOW);  
  sr.set(6, HIGH);  
  sr.set(7, LOW);  
 }  
 void trois()  
 { sr.setAllHigh();  
  sr.set(0, HIGH);  
  sr.set(1, LOW);  
  sr.set(2, LOW);  
  sr.set(3, LOW);  
  sr.set(4, LOW);  
  sr.set(5, HIGH);  
  sr.set(6, HIGH);  
  sr.set(7, LOW);  
 }  
 void quatre()  
 { sr.setAllHigh();  
  sr.set(0, HIGH);  
  sr.set(1, HIGH);  
  sr.set(2, HIGH);  
  sr.set(3, LOW);  
  sr.set(4, HIGH);  
  sr.set(5, HIGH);  
  sr.set(6, LOW);  
  sr.set(7, LOW);  
 }  
 void cinq()  
 { sr.setAllHigh();  
  sr.set(0, HIGH);  
  sr.set(1, LOW);  
  sr.set(2, HIGH);  
  sr.set(3, LOW);  
  sr.set(4, LOW);  
  sr.set(5, HIGH);  
  sr.set(6, LOW);  
  sr.set(7, LOW);  
 }  
 void six()  
 { sr.setAllLow();  
  sr.set(0, HIGH);  
  sr.set(1, HIGH);  
  sr.set(2, HIGH);  
 }  
 void sept()  
 { sr.setAllHigh();  
  sr.set(0, HIGH);  
  sr.set(1, LOW);  
  sr.set(2, LOW);  
  sr.set(3, LOW);  
  sr.set(4, HIGH);  
  sr.set(5, HIGH);  
  sr.set(6, HIGH);  
  sr.set(7, HIGH);  
 }  
 void huit()  
 { sr.setAllLow();  
  sr.set(0, HIGH);  
 }  
 void neuf()  
 { sr.setAllLow();  
  sr.set(0, HIGH);  
  sr.set(5, HIGH);  
 }  
 void zero()  
 { sr.setAllLow();  
  sr.set(0, HIGH);  
  sr.set(7, HIGH);  
 }

tab

Programmation
Affichage	Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Héxadecimal
0	0	1	1	1	1	1	1	0x3F
1	0	0	0	0	1	1	0	0x06
2	1	0	1	1	0	1	1	0x5B
3	1	0	0	1	1	1	1	0x4F
4	1	1	0	0	1	1	0	0x66
5	1	1	0	1	1	0	1	0x6D
6	1	1	1	1	1	0	1	0x7D
7	0	0	0	0	1	1	1	0x07
8	1	1	1	1	1	1	1	0x7F
9	1	1	0	1	1	1	1	0x6F
A	1	1	1	0	1	1	1	0x77
B	1	1	1	1	1	0	0	0x7C
C	0	1	1	1	0	0	1	0x39
D	1	0	1	1	1	1	0	0x5E
E	1	1	1	1	0	0	1	0x79
F	1	1	1	0	0	0	1	0x71