---
title: "Discussion on \"How a 7-Segment Display Works: Eight LEDs, One Shared Pin\" | Hashnode"
description: "Discussion on \"How a 7-Segment Display Works: Eight LEDs, One Shared Pin\". A 7-segment display is eight LEDs sharing one pin. Common anode vs common cathode, which segments make each digit, resistor values, and Arduino code."
url: "https://hashnode.com/posts/how-a-7-segment-display-works-eight-leds-one-shared-pin/6af41017b0cf023e55cd868e"
---

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# [How a 7-Segment Display Works: Eight LEDs, One Shared Pin](https://digicirq.hashnode.dev/how-a-7-segment-display-works-eight-leds-one-shared-pin?utm_source=hashnode&utm_medium=feed)

A 7-segment display is eight LEDs sharing one pin. Common anode vs common cathode, which segments make each digit, resistor values, and Arduino code.

15h ago · 5 min read · digicirq.hashnode.dev  
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Electronics, explained one circuit at a time. Written guides to every DigiCirq video.

DigiCirq is a faceless, diagram-only channel: short animated explainers on how electronics, Arduino, microcontrollers and the apps on your phone really work. Each post here is the written guide to one video, with the numbers worked out and something to try on your own bench. Videos: youtube.com/@digicirq

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