Insanity 4004

Experiments with the world's first microprocessor
and other electronic explorations

Friday, December 5, 2025

FEDEVEL Advanced PCB Layout: Post Lesson 2 notes

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I finished Lesson 2 of FEDEVEL Academy 's Advanced PCB Layout course yesterday. As I expected, there ratio of review to new material (f...
Sunday, November 30, 2025

Taking FEDEVEL's Advanced PCB Layout Course

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As part of a hobby project I'm designing a PCB that will include a Xilinx Zynq-7000 System-on-Chip and a DDR3L SDRAM. Both of these come...
Saturday, November 22, 2025

A look at a vintage PC's disk storage subsystem

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I've been doing a lot of work recently with vintage PC disk storage subsystems. I'm hoping to present a talk on this topic at the VC...
Saturday, November 1, 2025

My current museum project

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Here's what I'm currently working on restoring for the System Source Computer Museum : Yes, this is an IBM System/360 Model 20 from ...
Tuesday, October 21, 2025

Computeriter Emulator wrap-up

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Okay, so it's been 5 months since I updated this blog. I have some catching up to do! Spoiler alert: I did get everything working in tim...
Friday, May 30, 2025

Heavy Metal from the 1960s

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Any time you're working with older electronics, there's a risk that some of the components may have failed as a result of age. This ...
Sunday, May 11, 2025

Computeriter Emulator Software Design

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Since the Soroban Computeriter is entirely electro-mechanical, I expected everything to operate glacially slowly. Examination of the documen...
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