TM1637 4-digit 7-segment display

There are many different display modules that use a TM1637 IC from Titan MicroElectronics.

The color, size, dots, and connection points can vary widely, but as long as they use the TM1637,

 most should work.

 

A naked  4-digit 7-segment display will use 12 pins on your arduino.

The TM1637 cuts this down to 4.

 

The 4 connections are 

VCC 5V/3.3V

GND

CLK (clock)

DIO (Data I/O)

CLK & DIO are connected to any arduino digital pins.

It's your choice.

 

Each display is actually a collection of 7 LEDs

The individual segments are labelled A to G

By setting each LED to high or low, we can turn them on/off

 

The TM1637 module includes four 0.36 segment 7-segment displays.

 

You’ll need to use a library or two.

 

Which one depends on the type of module you have.

Avishay Orpaz has written a great library for TM1637 displays, the TM1637Display library.  

 These require this compiler directive to be placed in your code:

// Include the library
#include <TM1637Display.h>

I have another TM display that uses the Grove library

https://wiki.seeedstudio.com/Grove-4-Digit_Display/

https://github.com/Seeed-Studio/Seeed_Grove_4Digital_Display_g 

You need to put this into your code:

// include the grove.seeedstudio library 

#include <TM1637.h> 

 And then define the pins

 

// Define the connections pins
#define CLK 2
#define DIO 3

Next, we need the function  

TM1637Display(). 

or

 TM1637 tm(2, 3);




This function requires two parameters:

the CLK pin and the the DIO pin.

TM1637Display display = TM1637Display(CLK, DIO);

OR 

 TM1637 tm(2, 3);

The code depends on the type of display you have.

Before you buy it, research what library it needs. 

The main functions include:

• setSegments() – Set the raw value of the segments of each digit
• showNumberDec() – Display a decimal number
• showNumberDecEx() – Display a decimal number with decimal points or colon
• setBrightness() – Set the brightness of the display
• clear() – Clear the display

 Here is a simple display sketch.

It's actually the basic example in the ARDUINO IDE. 

These TM1637 Driver examples work well.

They all use the 
#include <TM1637.h> 

//************************** 

 code 1

This refers to displays that use the  #include <TM1637.h> library

To set the brightness, pass in a value between 0-7 into tm.setBrightness(); 

tm.display(); will display a character on the display. 

You are restricted to just 4 characters. 

Simply type in any alpha-numeric characters you wish. 

//*******************

#include <TM1637.h>


// Instantiation and pins configurations
// Pin 3 - > DIO
// Pin 2 - > CLK
TM1637 tm(2, 3);

void setup()
{
    tm.begin();
    tm.setBrightness(4);
}

void loop()
{
    // Display Integers:
    tm.display(1234);
    delay(1000);

    // Display float:
    tm.display(29.65);
    delay(1000);

    // Display String:
    tm.display("PLAY");
    delay(1000);
    tm.display("STOP");
    delay(1000);
}


//*******************************************************

Links

+ https://www.makerguides.com/tm1637-arduino-tutorial/

+ https://lastminuteengineers.com/tm1637-arduino-tutorial/

+ https://www.instructables.com/Tutorial-How-to-4-Digit-Display-Interface-With-Ard/ 

+ https://create.arduino.cc/projecthub/ryanchan/tm1637-digit-display-arduino-quick-tutorial-ca8a93

+ https://www.youtube.com/watch?v=6W7tycX-F1o&t=64s 

+ https://www.youtube.com/watch?v=l6QoGsdHzfM

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+ Arduino Index 

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