---
title: "Arduino with 4-digit 7-segment LED Display"  
description: "Arduino WorksIntroduction: In this circuit, we will show how to display numerals on a 4-digit 7-segment display just by directing using any Arduino mi"  
author: "Arduino Man"  
published: 2016-03-10  
updated: 2020-03-04  
canonical: https://www.mindstick.com/articles/11999/arduino-with-4-digit-7-segment-led-display  
category: "visual c++"  
tags: ["assembly"]  
reading_time: 1 minute  

---

# Arduino with 4-digit 7-segment LED Display

**//[Arduino](https://www.mindstick.com/forum/34037/how-to-use-infrared-proximity-sensor-with-arduino-using-c-plus-plus-code) Works**

[Introduction](https://yourviews.mindstick.com/view/85450/mesopotamia-introduction-to-an-ancient-civilization): In this [circuit](https://www.mindstick.com/forum/162028/what-is-circuit-breakers), we will show how to display numerals on a 4-digit 7-segment display just by directing using any Arduino [microcontroller](https://www.mindstick.com/forum/157529/what-is-microcontroller-mcu) with no other [external](https://answers.mindstick.com/qa/45347/who-is-the-minister-of-external-affairs) chips such as LED display drivers.![Arduino_works_4-digit-7-segment-LED-display-pinout](http://arduinoworks.com/wp-content/uploads/2016/02/4-digit-7-segment-LED-display-pinout-300x207.png)

![LED Digital Display](http://arduinoworks.com/wp-content/uploads/2016/02/LED_Digital_Display-300x225.jpg)

Each segment in the display module is multiplexed, meaning it shares the same anode [connection](https://yourviews.mindstick.com/view/83497/a-40-year-old-man-has-been-arrested-in-connection-with-the-abe-shooting) points. And each of the four digits in the module have their own common cathode connection point. This allows each digit to be turned on or off independently. Also, this multiplexing [technique](https://answers.mindstick.com/qa/102844/what-is-the-pomodoro-technique-and-does-it-work) turns the massive amount of microcontroller pins necessary to [control](https://yourviews.mindstick.com/view/83439/bipartisan-gun-control-bill-passed-in-us-after-decades) a display into just eleven or twelve (in place of thirty-two)

Learn More about 4-digit-7 segment display

**[Components](https://www.mindstick.com/blog/74096/understanding-the-role-of-some-integral-ac-components):**

- Arduino Uno
- 4-digit 7-segment LED display
- 4 1KΩ resistors
- 4 2N3904 NPN transistors or any other NPN transistor
- Potentiometer/[Variable](https://www.mindstick.com/blog/11493/what-is-a-variable) Resistor

**Find Code and Circuit Here....**

---

Original Source: https://www.mindstick.com/articles/11999/arduino-with-4-digit-7-segment-led-display

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