https://github.com/blackbit42/HP54542_LCD2VGA Skip to content Toggle navigation Sign up * Product + Actions Automate any workflow + Packages Host and manage packages + Security Find and fix vulnerabilities + Codespaces Instant dev environments + Copilot Write better code with AI + Code review Manage code changes + Issues Plan and track work + Discussions Collaborate outside of code + Explore + All features + Documentation + GitHub Skills + Blog * Solutions + For + Enterprise + Teams + Startups + Education + By Solution + CI/CD & Automation + DevOps + DevSecOps + Case Studies + Customer Stories + Resources * Open Source + GitHub Sponsors Fund open source developers + The ReadME Project GitHub community articles + Repositories + Topics + Trending + Collections * Pricing [ ] * # In this repository All GitHub | Jump to | * No suggested jump to results * # In this repository All GitHub | Jump to | * # In this user All GitHub | Jump to | * # In this repository All GitHub | Jump to | Sign in Sign up {{ message }} blackbit42 / HP54542_LCD2VGA Public * Notifications * Fork 1 * Star 6 Conversion of HP 54520C / 54540C oscilloscopes to VGA display(s) 6 stars 1 fork Star Notifications * Code * Issues 0 * Pull requests 0 * Actions * Projects 0 * Security * Insights More * Code * Issues * Pull requests * Actions * Projects * Security * Insights blackbit42/HP54542_LCD2VGA This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. main Switch branches/tags [ ] Branches Tags Could not load branches Nothing to show {{ refName }} default View all branches Could not load tags Nothing to show {{ refName }} default View all tags Name already in use A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch? Cancel Create 1 branch 0 tags Code * Local * Codespaces * Clone HTTPS GitHub CLI [https://github.com/b] Use Git or checkout with SVN using the web URL. [gh repo clone blackb] Work fast with our official CLI. Learn more. * Open with GitHub Desktop * Download ZIP Sign In Required Please sign in to use Codespaces. Launching GitHub Desktop If nothing happens, download GitHub Desktop and try again. Launching GitHub Desktop If nothing happens, download GitHub Desktop and try again. Launching Xcode If nothing happens, download Xcode and try again. Launching Visual Studio Code Your codespace will open once ready. There was a problem preparing your codespace, please try again. Latest commit @blackbit42 blackbit42 add README.md for github ... 06cae1d Jan 13, 2023 add README.md for github 06cae1d Git stats * 17 commits Files Permalink Failed to load latest commit information. Type Name Latest commit message Commit time fpga images pcb .gitignore .vimrc README.md View code Conversion of HP 54520C / 54540C oscilloscopes to VGA display(s) Implementation details Findings Errata PCBs Pictures README.md Conversion of HP 54520C / 54540C oscilloscopes to VGA display(s) The HP 54520C / 54540C series of oscilloscopes is equipped with color LCD displays, in contrast to their non-C predecessors which had monochrome CRT displays. While the multi-color display is nice in principle, the LCDs that were used unfortunately commonly failed. Those scopes are still quite capable by 2023 standards, hence worth preserving. The content of this repository is a conversion of the scope to VGA through a FPGA bitstream and a PCB design that is using an UPduino as a daughterboard. Pretty much the same hack has been done before by Adil Malik, though now FPGA and PCB designs are made available for other people to reproduce. Implementation details The PCB is designed to have mounting holes placed in distance to be compatible with VESA MIS-D (75x75), which allows the PCB to be mounted sturdily at the backside of the used VGA TFT inside the scope. Hirose DF13 connectors are stipulated on the PCB so that the original LCD cables don't have to be modified. The PCB and UPduino are powered from the LCD connections. The VGA TFT is powered from the scope PSU. The entire modification of the instrument is non-invasive and can be undone if desired. Findings HP decided to mount the LCD panel upside down. Probably as that was convenient is regards to the position of the connectors. An implication of that is that the internal VGGA monitor is mounted upside down as well (which doesn't make a difference really) and that an external monitor must be rotated as well. If one would desire to change that, a frame buffer must be implemented in the FPGA, which isn't hard to do but required more RAM than the UPduino has. Errata Rev.1 of the PCB design contains an error. The footprint for the UPduino is 0.2" too narrow. I fixed this with infamous offset-pinheaders of shame. Keep this in mind if you intend to get a PCB produced. Patches welcome :-) PCBs As of 10 Jan 2023 I have some spare PCBs in stock. Get in touch via the email address I've used for the commits if you want one. Pictures 1.jpeg 2.jpeg 3.jpeg 4.jpeg 5.jpeg About Conversion of HP 54520C / 54540C oscilloscopes to VGA display(s) Resources Readme Stars 6 stars Watchers 2 watching Forks 1 fork Releases No releases published Packages 0 No packages published Languages * C++ 81.6% * Makefile 12.4% * Verilog 5.8% * Vim Script 0.2% Footer (c) 2023 GitHub, Inc. Footer navigation * Terms * Privacy * Security * Status * Docs * Contact GitHub * Pricing * API * Training * Blog * About You can't perform that action at this time. You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session.