View source for KS0445 keyestudio 4-digit LED Display Module


[[image:Ks0445-.png|thumb|400px|right|keyestudio 4-digit LED Display Module]]


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== Overview == 
The keyestudio 4-digit LED Display Module integrates a 0.36" 4-Digit 7-Segment Display Common Anode with 12 pins. It uses the driver chip TM1637. <br>
The module has 4 control pins of 2.54mm pitch, which can direct connect to microcontroller with jumper wires. <br>
So it’s very easy to control the matrix without tons of wiring. Available to make microcontroller control the 4-digit LED segment display via signal interface, greatly saving IO pin resource on microcontroller. <br>
The module has two 3mm fixed holes, convenient for mounting on other devices. <br>
If you've been eyeing matrix displays but hesitated because of the complexity, this is the solution you've been looking for! <br>

[[File:Ks0445-2.png|300px|right|thumb]]

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== Technical Details ==
* Operating voltage: DC 5V
* Operating temperature range: -40～+85℃
* Dimensions: 45mm*21mm*10mm
* Weight: 7.2g

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== Hookup Guide ==  
Connect the CLK pin to Digital 4, DIO pin to Digital 3, VCC pin to 5V, GNG to ground.<br>
<br>[[File:Ks0445-3.png|600px|frameless|thumb]]<br>  


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== Test Code ==
<span style=color:red> Don’t forget to place the necessary library into Arduino library directory when uploading the test code. </span><br>

<pre>
#include "TM1637.h"
#define CLK 4//pins definitions for TM1637 and can be changed to other ports       
#define DIO 3
TM1637 tm1637(CLK,DIO);
void setup()
{
  tm1637.init();
  tm1637.set(BRIGHT_TYPICAL);//BRIGHT_TYPICAL = 2,BRIGHT_DARKEST = 0,BRIGHTEST = 7;
}
void loop()
{
  //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 NumTab[] = {0,1,2,3,4,5,6,7,8,9};//0~9,A,b,C,d,E,F
  int8_t ListDisp[4];
  unsigned char i = 0;
  unsigned char count = 0;
  delay(150);
  while(1)
  {
    i = count;
    count ++;
    if(count == sizeof(NumTab)) count = 0;
    for(unsigned char 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[0]); 
    tm1637.display(2,ListDisp[0]);
    tm1637.display(3,ListDisp[0]);
    tm1637.point(POINT_ON);
    delay(100);
    }
  }
}
</pre>


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== Result == 
Done uploading the code, the 4-digit LED display will show the number from 0 to 9. <br>
The LED segment display is normally on and each segment shows the same digit.
<br>[[File:Ks0445-4.png|600px|frameless|thumb]]<br>


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==Resource==
*'''Download all the relevant info. from the link:'''<br>
https://drive.google.com/open?id=15LQf7aD4KfjFg1VJs9KbvxF9LewgxtXN


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==Buy from ==
*[ '''Official Website''']

*[https://www.aliexpress.com/store/product/keyestudio-4-digit-LED-Display-Module-TM1637-for-Arduino/1452162_33049609182.html?spm=2114.12010611.8148356.17.26ac6c0eFq90W1  ''' Shop on Aliexpress ''']


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[[category:Module]]