--- title: Own The OSD Chip In Your Cheap Composite Monitor | daily.dev description: A hobbyist reverse-engineered the AMT630A on-screen-display chip found in a cheap automotive reversing camera monitor, enabling custom graphics to be drawn via... canonical: https://daily.dev/posts/own-the-osd-chip-in-your-cheap-composite-monitor-s8jyjkl9g twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Own The OSD Chip In Your Cheap Composite Monitor | daily.dev og:description: A hobbyist reverse-engineered the AMT630A on-screen-display chip found in a cheap automotive reversing camera monitor, enabling custom graphics to be drawn via... og:url: https://daily.dev/posts/own-the-osd-chip-in-your-cheap-composite-monitor-s8jyjkl9g og:image: https://api.daily.dev/og/posts/s8jYjKl9G.png og:image:alt: Own The OSD Chip In Your Cheap Composite Monitor 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. # Own The OSD Chip In Your Cheap Composite Monitor **[Hackaday](https://daily.dev/sources/hackaday)** · 1 min read · 0 upvotes · 0 comments ## Summary A hobbyist reverse-engineered the AMT630A on-screen-display chip found in a cheap automotive reversing camera monitor, enabling custom graphics to be drawn via an I2C connection from an ESP32. The chip combines video switching hardware, OSD graphics, and an 8052 microcontroller core, though the 8052 itself remained inaccessible. The work was published as a GitHub repository and an Arduino library, intended for use as a navigational data display inside a homemade Robbie the Robot costume. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How can I control the AMT630A on-screen-display chip from an ESP32? The AMT630A, found in cheap automotive reversing camera monitors, can be controlled over an I2C connection from an ESP32 using a published Arduino library. The chip handles video switching and OSD graphics via an onboard 8052 microcontroller core, though direct access to that 8052 core itself was not achieved; control instead goes through the exposed I2C interface. _Developers tinkering with obscure embedded chips can find similar reverse-engineering write-ups curated on daily.dev._ ## Similar posts on daily.dev - [Reverse Engineering A Sony Car Stereo LCD](https://daily.dev/posts/reverse-engineering-a-sony-car-stereo-lcd-oux1wn4iz) · Hackaday · 1 upvotes · 0 comments - [5 ESP32 projects anyone can build with the Cheap Yellow Display](https://daily.dev/posts/5-esp32-projects-anyone-can-build-with-the-cheap-yellow-display-6yy1e2qxt) · XDA Developers · 0 upvotes · 0 comments - [A Cheap And Easy Control Screen For Home Assistant](https://daily.dev/posts/a-cheap-and-easy-control-screen-for-home-assistant-rb9h4sswz) · Hackaday · 0 upvotes · 0 comments - [Someone turned old analog gauges into real-time PC monitors using an ESP32](https://daily.dev/posts/someone-turned-old-analog-gauges-into-real-time-pc-monitors-using-an-esp32-hwl51mnkw) · XDA Developers · 1 upvotes · 0 comments - [Microchip, Marelli Target Software-Defined Vehicle Display Systems](https://daily.dev/posts/microchip-marelli-target-software-defined-vehicle-display-systems-twf79mp0a) · Embedded.com · 0 upvotes · 0 comments --- Tags: [#iot](https://daily.dev/tags/iot), [#embedded](https://daily.dev/tags/embedded), [#reverse-engineering](https://daily.dev/tags/reverse-engineering) [View this post on daily.dev](https://daily.dev/posts/own-the-osd-chip-in-your-cheap-composite-monitor-s8jyjkl9g) ```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":"Own The OSD Chip In Your Cheap Composite Monitor","url":"https://daily.dev/posts/own-the-osd-chip-in-your-cheap-composite-monitor-s8jyjkl9g","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/own-the-osd-chip-in-your-cheap-composite-monitor-s8jyjkl9g"},"datePublished":"2026-10-03T11:24:14.360Z","dateModified":"2026-10-03T11:24:31.502Z","description":"A hobbyist reverse-engineered the AMT630A on-screen-display chip found in a cheap automotive reversing camera monitor, enabling custom graphics to be drawn via...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/0ae866aad19dcdc1ce74c233d0ce9499?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/0ae866aad19dcdc1ce74c233d0ce9499?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Hackaday","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Hackaday","logo":"https://media.daily.dev/image/upload/s--JhDfhy70--/f_auto,q_auto/v1767541814/logos/hackaday","url":"https://daily.dev/sources/hackaday"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/own-the-osd-chip-in-your-cheap-composite-monitor-s8jyjkl9g","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"iot,embedded,reverse-engineering","timeRequired":"PT1M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Hackaday","item":"https://daily.dev/sources/hackaday"},{"@type":"ListItem","position":3,"name":"Own The OSD Chip In Your Cheap Composite Monitor"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/own-the-osd-chip-in-your-cheap-composite-monitor-s8jyjkl9g#faq","mainEntity":[{"@type":"Question","name":"How can I control the AMT630A on-screen-display chip from an ESP32?","acceptedAnswer":{"@type":"Answer","text":"The AMT630A, found in cheap automotive reversing camera monitors, can be controlled over an I2C connection from an ESP32 using a published Arduino library. The chip handles video switching and OSD graphics via an onboard 8052 microcontroller core, though direct access to that 8052 core itself was not achieved; control instead goes through the exposed I2C interface. Developers tinkering with obscure embedded chips can find similar reverse-engineering write-ups curated on daily.dev."}}]} ```