Four digit nixie tube display multi digit timing

1. • Catalog

     Preface

     One 、 A total of four anode digital tubes

     Two 、 Show numbers

     1. Display a single number

     2. Display multiple digits

     summary

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     Preface

     A total of four anode digital tube display 0-9 For a single number, you only need to control the corresponding pin level , But if you need to display multiple numbers , It is not only necessary to control the corresponding level , We also need to use the afterglow effect of human eyes , Achieve by high refresh rate .

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     One 、 A total of four anode digital tubes

     

      

         The pin of this four digit nixie tube 12、9、8、6 The corresponding ones are 1、2、3、4 Bit digital strobe signal , Pin 11、7、4、2、1、10、5、3 They correspond to digital tubes a、b、c、d、e、f、g、dp The signal of , The common anode is lit at low level .

• Two 、 Show numbers

• The main controller uses arduino nano plate , Connection table of corresponding pins .

• Position selection 1	Position selection 2	Position selection 3	Position selection 4	a	b	c	d	e	f	g	dp
  12	9	8	6	11	7	4	2	1	10	5	3
  P13	P10	P9	P7	P12	P8	P5	P3	P2	P11	P6	P4

• 1. Display a single number

• Clear all bits ：

• void clear() {
    digitalWrite(13,LOW);
    digitalWrite(10,LOW);
    digitalWrite(9,LOW);
    digitalWrite(7,LOW);
    digitalWrite(12,LOW);
    digitalWrite(8,LOW);
    digitalWrite(5,LOW);
    digitalWrite(3,LOW);
    digitalWrite(2,LOW);
    digitalWrite(11,LOW);
    digitalWrite(6,LOW);
    digitalWrite(4,HIGH);
  }

• Show numbers 0：

• void num0() {
    digitalWrite(12,LOW);
    digitalWrite(8,LOW);
    digitalWrite(5,LOW);
    digitalWrite(3,LOW);
    digitalWrite(2,LOW);
    digitalWrite(11,LOW);
    digitalWrite(6,HIGH);
    digitalWrite(4,HIGH);
  }

  Show numbers 1：

• void num1() {
    digitalWrite(12,HIGH);
    digitalWrite(8,LOW);
    digitalWrite(5,LOW);
    digitalWrite(3,HIGH);
    digitalWrite(2,HIGH);
    digitalWrite(11,HIGH);
    digitalWrite(6,HIGH);
    digitalWrite(4,HIGH);
  }

• 2. Display multiple digits

  Show numbers 10：

• void num10() {
    digitalWrite(9,HIGH);
    num1();
    delay(1);
    clear();
    delay(1);
    digitalWrite(7,HIGH);
    num0();
    delay(1);
    clear();
    delay(1);
  }

  You must add one delay Time delay , Otherwise, only numbers will be displayed 0. The delay time can be adjusted according to your own needs .

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  summary

  Only two digits are shown here , The principle of displaying three digits and four digits is the same , Display the corresponding number by controlling the strobe bit , The delay should be as small as possible , It's OK to reach the resolution that the eye can't find the refresh .