CODE | TM1637 4Digital 7Segment Display Module - Arduino Project 034
A standard 4-digit 7-segment display is needed for clock, timer and counter projects, but it usually requires 12 connections. The TM1637 module makes it easier by only requiring 4 connections: 2 for power and 2 for controlling the segments.
A TM1637 module typically consists of four 7-segment LEDs and a colon-shaped LED in the middle: It is ideal for displaying time in hours and minutes, or minutes and seconds, or scores of two teams.
Project 34 Interfacing TM1637 4 Digital 7 Segment Display Module
4 Digital 7 Segment Display
TM1637 4 Digital 7 Segment Display Circuit
TM1637 4 Digital 7 Segment Display Schematic
/* Coding Ron Wang
Nov.27th 2024
Autaba support for coding hardware
Project 034 TM1637 4 digit 7 segment display with Arduino.
*/
#include "TM1637Display.h"
#define CLK 2
#define DIO 3
TM1637Display display = TM1637Display(CLK, DIO); // Create display object of type TM1637 Display
const uint8_t data[] = {0xff, 0xff, 0xff, 0xff}; // Create array that turns all segments on
const uint8_t blank[] = {0x00, 0x00, 0x00, 0x00}; // Create array that turns all segments off
// You can set the individual segments per digit to spell words or create other symbols
const uint8_t DONE[] = {
SEG_B | SEG_C | SEG_D | SEG_E | SEG_G, // d
SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F, // O
SEG_C | SEG_E | SEG_G, // n
SEG_A | SEG_D | SEG_E | SEG_F | SEG_G // E
};
// Create degree Celsius symbol:
const uint8_t celsius[] = {
SEG_A | SEG_B | SEG_F | SEG_G, // Circle
SEG_A | SEG_D | SEG_E | SEG_F // C
};
void setup() {
// Clear the display:
display.clear();
delay(1000);
}
void loop() {
// Set the brightness:
display.setBrightness(7);
// All segments on:
display.setSegments(data);
delay(1000);
display.clear();
delay(1000);
// Show counter:
int i;
for (i = 0; i < 101; i++) {
display.showNumberDec(i);
delay(50);
}
delay(1000);
display.clear();
delay(1000);
// Print number in different locations, loops 2 times:
int j;
for (j = 0; j < 2; j++) {
for (i = 0; i < 4; i++) {
display.showNumberDec(i, false, 1, i);
delay(500);
display.clear();
}
}
delay(1000);
display.clear();
delay(1000);
// Set brightness (0-7):
int k;
for (k = 0; k < 8; k++) {
display.setBrightness(k);
display.setSegments(data);
delay(500);
}
delay(1000);
display.clear();
delay(1000);
// Print 1234 with the center colon:
display.showNumberDecEx(1234, 0b11100000, false, 4, 0);
delay(1000);
display.clear();
delay(1000);
int temperature = 24;
display.showNumberDec(temperature, false, 2, 0);
display.setSegments(celsius, 2, 2);
delay(1000);
display.clear();
delay(1000);
display.setSegments(DONE);
while(1);
} 
