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The Computer-free Automation of a Jukebox (Electromechanics)

Technology Connections · Youtube · 4 HN points · 4 HN comments
HN Theater has aggregated all Hacker News stories and comments that mention Technology Connections's video "The Computer-free Automation of a Jukebox (Electromechanics)".
Youtube Summary
Ever wonder how we made all these crazy machines do all their crazy machine things before computers came along? Wonder no more as we explore the inner workings of a Wurlitzer 3400 series jukebox from 1970!

There are some links here for your enjoyment. Please enjoy these enjoyable links!

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Hacker News Stories and Comments

All the comments and stories posted to Hacker News that reference this video.
By today's standard Doom doesn't need much processing power.

You could probably find exactly the right chip that only has exactly just as many bits of RAM as you need for the lamp's functionality. But that would probably be more expensive to develop and chip than just using standard parts?

Even more radical: I suspect with a bit of cleverness you could probably do everything the lamp needs to do with some relays and transistors. But today, that would be more expensive.

Compare https://www.youtube.com/watch?v=NmGaXEmfTIo for the latter approach.

jfrunyon
Implementing wifi/RF with "some relays and transistors" doesn't sound fun.
eru
Yes. I should have been less sloppy: you'd have to rethink what the lamp needs to be able to do slightly, too.
nxpnsv
Not to you perhaps, but I’d watch the video if some patient/insane/genius built it...
moftz
You could do something very basic with discrete components for controlling wireless lighting systems but system starts to get out of hand when you need to have a bunch of lights nearby. It's much cheaper, simpler, and smaller to reduce it down to a chip and move to a digital RF system. I've got a bunch of RF controlled outlets in my house but it's just about the dumbest system you can buy. It's on par with the typical remote garage door opener. You can program the on/off buttons on the remote for each outlet but that's as far as it goes. I'd like to be able to remotely control them away from home or be able to give each light or outlet its own schedule and that requires either a central controller or each device having network access for network time and remote control.

Interestingly, a friend rented a house in college once that had a system of low voltage light switches that ran back to a cabinet filled with relays that controlled light switches and outlets. No major benefit to the user other than a control panel in the master bedroom that lets you control the exterior and some interior lights. It was a neat system but definitely outdated. I'd imagine a retrofit would be to drop all of the relays for solid state and provide a networked controller to monitor status and provide remote control.

Here's something similar that you might be interested in: https://www.youtube.com/watch?v=NmGaXEmfTIo
Jan 18, 2021 · 1 points, 0 comments · submitted by Tomte
This video made me aware of his channel a few months back and I've been hooked. I really enjoyed the multi-part one where he explained the inner workings of a jukebox[0]

[0] https://youtu.be/NmGaXEmfTIo

The computer free automation of a jukebox from the 1970s is an eye opener: (an in depth teardown and explanation) https://youtu.be/NmGaXEmfTIo
Mar 08, 2020 · 2 points, 0 comments · submitted by fortran77
Mar 08, 2020 · 1 points, 0 comments · submitted by qndreoi
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