micro:bit and TM1637 7 segment display example

A common display module that you can buy on the internet contain the Tm1638 driver chip, I was interested in this one which is the TM1637 which appears to be a more basic version which can only control a display, the TM1638 can also control LED’s, buttons and two displays at the same time.

This is a common anode 4-digit tube display module which uses the TM1637 driver chip; Only 2 connections are required to control the 4-digit 8-segment displays

Here is the module

Features of the module

Display common anode for the four red LED
Powered supply by 3.3V/5V
Four common anode tube display module is driven by IC TM1637
Can be used for Arduino devices, two signal lines can make the MCU control 4 8 digital tube. Digital tube 8 segment is adjustable
Here is how to hook the module up, the good news is this worked with my LOLIN32 and 3.3v



microbit and TM1637
microbit and TM1637



There is a library for this IC, you can get it from https://github.com/avishorp/TM1637 , as usual there is a built in example but here is a simple sketch

[codesyntax lang=”cpp”]

#include <TM1637Display.h>

const int CLK = 3; //Set the CLK pin connection to the display
const int DIO = 4; //Set the DIO pin connection to the display

int numCounter = 0;

TM1637Display display(CLK, DIO); //set up the 4-Digit Display.

void setup()
display.setBrightness(0x0a); //set the diplay to maximum brightness

void loop()
for(numCounter = 0; numCounter < 1000; numCounter++) //Iterate numCounter
display.showNumberDec(numCounter); //Display the numCounter value;





1pcs 4 Bits TM1637 Red Digital Tube LED Display Module & Clock for Arduino LED Free Shipping

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