The TM1637 4-Digit 7-Segment Display Module is an iconic interface for displaying numerical data and basic time formats. At Electrapac, we recommend this module for makers who want a classic, high-visibility digital readout without the nightmare of wiring 12+ individual pins.

Product Overview

This module features four 0.36-inch red 7-segment digits driven by the TM1637 specialized controller. While a standard 4-digit display normally requires many connections, this module uses a 2-wire serial interface (plus power), saving your microcontroller's pins for other sensors and actuators.

Key Features for Electrapac Customers

• Simple 4-Pin Connection: Only requires VCC, GND, and two data lines (CLK and DIO). This makes it perfectly compatible with Arduino, Raspberry Pi, and ESP8266.

• Integrated Clock Colon: The center colon makes it the "go-to" choice for building digital clocks, timers, and stopwatches.

• Adjustable Brightness: The TM1637 chip allows for software-based dimming, essential for projects that need to be readable both in dark rooms and bright offices.

• Low Processor Overhead: Unlike raw 7-segment displays that require constant multiplexing from your CPU, the TM1637 handles the display refresh internally.

• Compact Form Factor: The PCB includes four 2mm mounting holes, making it easy to install into a custom Electrapac project faceplate.

Pin Configuration & Connection Guide

To get your numbers glowing, follow this standard Electrapac wiring guide:

1. GND: Connect to Ground.

2. VCC: Connect to +5V or +3.3V.

3. DIO (Data I/O): Connect to any Digital Pin (Arduino D2).

4. CLK (Clock): Connect to any Digital Pin (Arduino D3).

Electrapac Pro-Tip: Use the "TM1637Display" library in the Arduino Library Manager. It includes built-in functions to display integers, clear the screen, and even show simple words like "Cool," "Heat," or "Err."

Primary Applications

• Digital Clocks: The most popular use case for this module, utilizing the center colon for HH:MM.

• Countdown Timers: Great for kitchen timers, gym workout counters, or industrial process timers.

• Temperature Readouts: Pair it with a DS18B20 sensor to display real-time room or liquid temperatures.

• Scoreboards: Keeping track of points or laps for tabletop games and RC racing.

• Counter Modules: Displaying the number of items passing a sensor on a production line.

Why Shop at Electrapac?

We source our TM1637 Modules with high-quality LED segments to ensure uniform color and brightness across all four digits. Visit us at for the digital displays that make your data easy to read at a glance.