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The Retro Repairs RoundUp crew invited me to be a guest on episode 56 of their livestream. As their name implies, they discuss retro computers and, in many streams, how to repair them. We mostly discussed the Mega IIe project. Sean was another guest who talked about KansasFest 2024.

KansasFest is an Apple II conference. This year, it moved its venue to Springfield, Illinois. The name and the location might seem confusing; however, it was long held in Missouri. So, it is a case of the name sticking for historical reasons.

It was great to be on the show, especially since I recognized everyone from other aspects of the retro community. You can watch the full Retro Repairs RoundUp here.

KiCad KiCon 2019 BannerOn April 26th and 27th, the first year of KiCad KiCon kicks off in the Windy City. Join me and 26 others for talks about the open source electronics CAD tool. The list of speakers is impressive. There are many names which I follow on social media and some I recognize from the KiCad team. For example, Wayne Stambaugh is the KiCad project leader and has one of the keynote talks.

You can see the full list of KiCon talks here. And tickets are available here.

Bald Engineer’s Apple IIgs KiCon Talk

Here is the description for my KiCon talk.

While documentation exists for 1970’s and 1980’s calculators and computers, unfortunately they exist in bitmap formats. As I started converting parts of the Apple IIgs schematic to KiCad, I realized something. There are benefits to “preserving” historical schematics in a living, active, and open format. In this talk, I talk about my experiences in converting scanned PDFs into KiCad, the project behind that motivation, and to encourage help from others to preserve history with KiCad.

So what is it? Well, several months ago, I did a couple of Apple IIgs hardware live streams. I have a project in mind for the MEGA-II ASIC. But before I could move forward on the project, I wanted a modern version of the IIgs schematic.

While schematics for classic 8 (and 16-bit) computers are readily available, they are usually only in PDF format. Studying the design is like reading a book. While I am glad the PDFs are available, I would like to be able to do actions like a search.

In my talk, I’ll explain why we should be converting these classic schematics into an open format. Along the way, I’ll take the audience through my journey of using KiCad for this project. In the end, I’ll be asking for help to convert other classic computer schematics.

Where is KiCad KiCon 2019?

The location for the conference is mHUB in Chicago, IL. If you’re able to attend in person, I look forward to meeting you. If you’re not able to travel, I fully expect either a live stream or recorded versions of the talks to be available.

Learn more about KiCad KiCon 2019

high-end-oscilloscopes-evaluation engineering

The concept of high end varies depending on what you are talking about and who you talk too. In this Evaluation Engineering Evaluation Engineering article the author discusses high-end oscilloscopes. I am mentioned several times in this article as part of my day job at Rhode and Schwarz. There I am a product manager for oscilloscopes in North America. We have scopes that range from 50 MHz to 8 GHz.

For a little bit of context let me explain how this type of article works. The author, or editor, reaches out to some field experts. Each person is asked to fill out a written interview form. From there the author compiles the responses into a story like this one. This process is always nerve racking to me. I always worry I’ll misquote a specification or make a major typo. I don’t get see the article until it is published.

If you aren’t familiar with high bandwidth oscilloscopes, I think you will still find some value in reading about my favorite test tools.

Read the full article