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A project log for Mechanical Television - 1920s parts

Building a mechanical television with parts only from the 1920s. Focusing on simplicity.

paul-kocylaPaul Kocyla • 07/31/2026 at 16:25•3 Comments

There it is. It was hard to capture. What works is a global shutter 120fps capture with averaging.
Still a bit distorted here, but come on, it's working already :)
I'll play around a bit for beeing able to elaborate and improve on that.

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Paul McClay wrote 08/01/2026 at 03:18 • point

Bravo.

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Paul Kocyla wrote 08/03/2026 at 15:26 • point

Thanks. There will be a demo, but I still need to work on the display code a bit.
I'll post the MCU code of the video generator as soon as it's complete.
It's very easy to use, images are streamed via FTDI cable.

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Paul McClay wrote 08/06/2026 at 06:10 • point

Looking forward to the video demo!

Knowing nothing of "crater bulbs" I searched a bit. I'm lazy and didn't note sources, but the earliest mention I found was 1931 which is a little after your target period, but it seems that doesn't matter because the intended function of craters was to provide a bright point source for mechanically scanned optical projection -- and that isn't what you're doing. If correct, you wouldn't need a crater bulb specifically just any neon.  In the 20s there were "flat plate" neon bulbs that lit up a flat square. Used in and presumably made specifically for pre-crater mechanical TV. Seems like that would be the ideal for your setup. Fact check any of that before believing. Maybe you've read all of that already.

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