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penguin42

@penguin42@mastodon.org.uk

Chocolate eating computer geek, Manchester, UK
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TechConnectify , an Random Englisch
@TechConnectify@mas.to avatar

Gotta new video today for ya.
It's time to make fun of RCA again!
https://www.youtube.com/watch?v=YGT1EvmDJh4

penguin42 ,
@penguin42@mastodon.org.uk avatar

@TechConnectify I wonder if they got some 'certification' thing going, along the lines of 'you use light bulbs in your system, so you can use these without having to do new certification'.
(Either that or a desperate use for the growingly redundant vacuum tube line)

zxguesser , an Random Englisch
@zxguesser@oldbytes.space avatar

Well that was frustrating. I spent most of yesterday going round and round in circles trying to understand a complex bit of decoding logic, before eventually finding the mistake on the schematic which was making all my subsequent logic terms wrong.
Thanks Acorn Computers 😩

The pinout for a 74LS86, showing that it contains four exclusive OR gates

penguin42 ,
@penguin42@mastodon.org.uk avatar

@zxguesser What's that in?

TechConnectify , an Random Englisch
@TechConnectify@mas.to avatar

Who wants to get tilted?
https://youtu.be/XeDCCNFAULk

penguin42 ,
@penguin42@mastodon.org.uk avatar

@TechConnectify I love the detail on this series, and the historical bits.
I'm kind of curious how much overlap there was between the telephone design engineers and the pinball engineers; things like uniselectors and such all seem similar tech.

zxguesser , an Random Englisch
@zxguesser@oldbytes.space avatar

I'd like to say it worked first time, but then I'd have no explanation for staying up until 4AM soldering...
First all-up test of the new feed auto start/stop circuit with the rest of the machine actually connected was successful though 😅​

A complicated mechanism prints text onto ticker tape. The ticker tape begins moving automatically at the start of the message, and stops again shortly after the message ends.

penguin42 ,
@penguin42@mastodon.org.uk avatar

@zxguesser Oh lovely - when I saw the previous posts I'd assumed it was a tape punch; I've never actually seen a hellshreiber in operation. Given that keyboard, are you going for a full enigma clone as well?

penguin42 ,
@penguin42@mastodon.org.uk avatar

@zxguesser HTH did you build that keyboard?

penguin42 ,
@penguin42@mastodon.org.uk avatar

@zxguesser I look forward to your explanation about the hellschreiber works.

penguin42 ,
@penguin42@mastodon.org.uk avatar

@zxguesser Oh that's excellent; the note about marking stuff only allowed to be opened in the field is interesting; I read in a book ages ago (I think RV Jones The most Secret war?) that the Germans tended to build stuff for untrained users, because having banned Amateur radio earlier, they had less tech people in the field.

foone , an Random Englisch
@foone@digipres.club avatar

Who is letting @NanoRaptor design ram sticks?

penguin42 ,
@penguin42@mastodon.org.uk avatar

@foone @NanoRaptor Error correcting arms!

TechConnectify , an Random Englisch
@TechConnectify@mas.to avatar

Things are really heating up in this new video:
https://youtu.be/ff04ecF9Dfw

penguin42 ,
@penguin42@mastodon.org.uk avatar

@TechConnectify My microwave also has long cycles on it's reduced power modes, and I wish it was using shorter cycles; in a microwave the effect is to switch between boiling over, and not heating and back to boiling over, rathr than a nice mid simmer.

TechConnectify , an Random Englisch
@TechConnectify@mas.to avatar

I have apparently developed a knack for going on a grocery run and loading my fridge up with stuff juuuuust before it hits a defrost cycle.

It's happened like three times this year!

penguin42 ,
@penguin42@mastodon.org.uk avatar

@TechConnectify Oh for a small light to tell you.

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