Displays

TM1637 4-Digit Display

The TM1637 4-Digit Display is a small seven-segment LED module for showing numeric values and simple symbols. It uses a 2-wire TM1637 serial interface with CLK and DIO, plus VCC and GND for power.

Width: 46 mm

Pinout — TM1637 4-Digit Display

Pin	Signal	Description
`CLK`	clock	TM1637 serial clock input from the microcontroller.
`DIO`	data	Bidirectional TM1637 serial data line to the microcontroller.
`GND`	ground	Ground reference for power and logic signals.
`VCC`	power	Positive supply for the display module, typically 3.3V or 5V.

Example wiring diagram — TM1637 4-Digit Display

From	To	Wire
`board:D2`	`x1:CLK`	green
`board:D3`	`x1:DIO`	blue
`board:5V`	`x1:VCC`	red
`board:GND`	`x1:GND`	black

Example Arduino code — TM1637 4-Digit Display

This example was written and compile-checked for the arduino-uno. Codey Online adapts it to any other supported board for you.

#include <TM1637Display.h>

const int CLK_PIN = 2;
const int DIO_PIN = 3;

TM1637Display display(CLK_PIN, DIO_PIN);

void setup() {
  Serial.begin(9600);
  display.setBrightness(7);  // 0 to 7
  display.clear();

  Serial.println("TM1637 4-digit display example");
  Serial.println("Showing a counter on the display.");
}

void loop() {
  static unsigned int counter = 0;

  display.showNumberDec(counter, false);  // no leading zeros

  Serial.print("Counter: ");
  Serial.println(counter);

  counter++;
  if (counter > 9999) {
    counter = 0;
  }

  delay(1000);
}

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