--- title: Building A Heading Sensor Resistant To Magnetic Disturbances description: Retired instrumentation engineer Don Welch built a DIY heading indicator using a Teensy 4.0 microcontroller and a BNO085 IMU. To make it immune to magnetic... canonical: https://daily.dev/posts/building-a-heading-sensor-resistant-to-magnetic-disturbances-qeuboyajz twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Building A Heading Sensor Resistant To Magnetic Disturbances | daily.dev og:description: Retired instrumentation engineer Don Welch built a DIY heading indicator using a Teensy 4.0 microcontroller and a BNO085 IMU. To make it immune to magnetic... og:url: https://daily.dev/posts/building-a-heading-sensor-resistant-to-magnetic-disturbances-qeuboyajz og:image: https://api.daily.dev/og/posts/QEUbOyaJz.png og:image:alt: Building A Heading Sensor Resistant To Magnetic Disturbances og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Building A Heading Sensor Resistant To Magnetic Disturbances **[Hackaday](https://daily.dev/sources/hackaday)** · 2 min read · 0 upvotes · 0 comments ## Summary Retired instrumentation engineer Don Welch built a DIY heading indicator using a Teensy 4.0 microcontroller and a BNO085 IMU. To make it immune to magnetic disturbances, the magnetometer data is ignored entirely, relying only on the gyroscope and accelerometer. The device displays a compass rose on a small round TFT screen, updates at 200 Hz for smooth motion tracking, and can be manually calibrated via an encoder or by pointing north at startup. It is not aircraft-certified but serves as an interesting hobbyist recreation of aviation instrumentation. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Listen to Protons With a Homemade Magnetometer](https://daily.dev/posts/listen-to-protons-with-a-homemade-magnetometer-mwnzai1wh) · Hacker News · 0 upvotes · 0 comments - [A New Kind Of Inductively-damped Compass](https://daily.dev/posts/a-new-kind-of-inductively-damped-compass-nq7kdwb8d) · Hackaday · 0 upvotes · 0 comments - [Magnetometers Power GPS-Free Indoor Positioning](https://daily.dev/posts/magnetometers-power-gps-free-indoor-positioning-6s5nkwbfj) · IEEE Spectrum · 0 upvotes · 0 comments - [Game of Drones, Part 1: How IMU Navigation Architectures Make or Break a Drone](https://daily.dev/posts/game-of-drones-part-1-how-imu-navigation-architectures-make-or-break-a-drone-xwyjs4sq7) · Embedded.com · 0 upvotes · 0 comments --- Tags: [#embedded](https://daily.dev/tags/embedded) [View this post on daily.dev](https://daily.dev/posts/building-a-heading-sensor-resistant-to-magnetic-disturbances-qeuboyajz) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Building A Heading Sensor Resistant To Magnetic Disturbances","url":"https://daily.dev/posts/building-a-heading-sensor-resistant-to-magnetic-disturbances-qeuboyajz","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/building-a-heading-sensor-resistant-to-magnetic-disturbances-qeuboyajz"},"datePublished":"2026-03-06T09:27:43.628Z","dateModified":"2026-03-06T09:28:16.394Z","description":"Retired instrumentation engineer Don Welch built a DIY heading indicator using a Teensy 4.0 microcontroller and a BNO085 IMU. 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