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Linker 4-digit 7-segment module is a Four Yang digital tube display module  with 12 pins, the driver chip is TM1637, Just need 2 root signal lines can   control four digital tube through micro controller; following we will use WiringPi to drive the LED Bar:

（refer to the library, plz refer to http://learn.linksprite.com/raspberry-pi/guide-on-how-to-use-gpio-on-raspberry-pi/）[/vc_column_text][vc_tour][vc_tab title=”Hardware prepare” tab_id=”1427941865-1-41″][vc_column_text]RaspberryPi  x1

Linker ADC Base For RPi   x1

Linker 4-digit 7-segment module  x1

Linker Cable   x1[/vc_column_text][/vc_tab][vc_tab title=”Wiring Diagram ” tab_id=”1427941865-2-32″][vc_column_text]

[/vc_column_text][/vc_tab][vc_tab title=”Test code ” tab_id=”1427942481286-2-6″][vc_column_text]

#include "TM1637.h"
 
#define clk 4//pins definitions for TM1637 and can be changed to other ports       
#define dio 5
 
int setup()
{
 
  if(wiringPiSetup()==-1)
  {
     printf("setup wiringPi failed ! n");
     return 1;
  }
 
  pinMode(clk,INPUT);
  pinMode(dio,INPUT);
  delay(200); 
 
  TM1637_init(clk,dio);
  TM1637_set(BRIGHTEST,0x40,0xc0);//BRIGHT_TYPICAL = 2,BRIGHT_DARKEST = 0,BRIGHTEST = 7;
 
  printf("Digital Tube test code!n");
  printf("Using DATA = GPIO5, CLK = GPIO4.n");   
 
}
 
int main()
{
 
  int8_t NumTab[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};//0~9,A,b,C,d,E,F
  int8_t ListDisp[4];
  unsigned char i = 0;
  unsigned char count = 0;
  delay(150);
  setup();
  while(1)
  {
    unsigned char BitSelect = 0;
    i = count;
    count ++;
    if(count == sizeof(NumTab)) count = 0;
    for(BitSelect = 0;BitSelect < 4;BitSelect ++)
    {
      ListDisp[BitSelect] = NumTab[i];
      i ++;
      if(i == sizeof(NumTab)) i = 0;
    }
    TM1637_display(0,ListDisp[0]);
    TM1637_display(1,ListDisp[1]); 
    TM1637_display(2,ListDisp[2]);
    TM1637_display(3,ListDisp[3]);
    delay(500);
  }
}

[/vc_column_text][/vc_tab][vc_tab title=”Run Test ” tab_id=”1427942487551-3-7″][vc_column_text]1.Download the file: include TM1637.h/TM1637.c/Makefile（click to download： TestLibrary）

2. Unzip: copy the TM1637.h/TM1637.c/Makefile to the directory:pi@raspberrypi ~/wiringPi/wiringPi （ replace the Makerfile under the current directory) the excute pi@raspberrypi ~/wiringPi/wiringPi $ make and compile ，make then the TM1637.o file will generate at the current directory.  

3. Build a .c file and write the example code to it/save:$vi digitaltube_test.c

4.Compile the code: $ gcc digitaltube -o digitaltube ../wiringPi/TM1637.o -lwiringPi

5.Run the code: $sudo ./digitaltube

6.The result as following: 

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