---
title: "Discussion on \"How the 555 Timer Works: Three Resistors, Two Thirds, One Capacitor\" | Hashnode"
description: "Discussion on \"How the 555 Timer Works: Three Resistors, Two Thirds, One Capacitor\". Inside the 555: three resistors set 1/3 and 2/3 thresholds, two comparators watch a capacitor, a flip-flop makes it blink. Astable and monostable with formulas."
url: "https://hashnode.com/posts/how-the-555-timer-works-three-resistors-two-thirds-one-capacitor/6af40f8d3195cb2df9c2f693"
---

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# [How the 555 Timer Works: Three Resistors, Two Thirds, One Capacitor](https://digicirq.hashnode.dev/how-the-555-timer-works-three-resistors-two-thirds-one-capacitor?utm_source=hashnode&utm_medium=feed)

Inside the 555: three resistors set 1/3 and 2/3 thresholds, two comparators watch a capacitor, a flip-flop makes it blink. Astable and monostable with formulas.

15h ago · 4 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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